GET https://kbin.spritesserver.nl/m/asklemmy@lemmy.world/t/16764/What-are-some-promising-solutions-to-solar-power-s-lack-of/comment/166243/votes/up

Response
200 OK
IP
3.22.81.96
Profiled on
Token
582b4f

Security

Token

There is no security token.

Firewall

main Name
Security enabled
Stateless

Configuration

Key Value
provider security.user.provider.concrete.app_user_provider
context main
entry_point App\Security\KbinAuthenticator
user_checker App\Security\UserChecker
access_denied_handler (none)
access_denied_url (none)
authenticators 
[
  "two_factor"
  "remember_me"
  "App\Security\KbinAuthenticator"
  "App\Security\FacebookAuthenticator"
  "App\Security\GoogleAuthenticator"
  "App\Security\GithubAuthenticator"
  "App\Security\KeycloakAuthenticator"
]

Listeners

Listener Duration Response 
Symfony\Component\Security\Http\Firewall\ChannelListener {#723
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
  -logger: Monolog\Logger {#783 …}
  -httpPort: 80
  -httpsPort: 443
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\ContextListener {#706
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage {#1017 …}
  -sessionKey: "_security_main"
  -logger: Monolog\Logger {#783 …}
  -userProviders: Symfony\Component\DependencyInjection\Argument\RewindableGenerator {#705 …}
  -dispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
  -registered: false
  -trustResolver: Scheb\TwoFactorBundle\Security\Authentication\AuthenticationTrustResolver {#780 …}
  -sessionTrackerEnabler: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage::enableUsageTracking(): void {#703 …}
}
 0.90 ms (none) 
Symfony\Component\Security\Http\Firewall\AuthenticatorManagerListener {#584
  -authenticatorManager: Symfony\Component\Security\Http\Authentication\AuthenticatorManager {#595 …}
}
 0.00 ms (none) 
Scheb\TwoFactorBundle\Security\Http\Firewall\TwoFactorAccessListener {#582
  -twoFactorFirewallConfig: Scheb\TwoFactorBundle\Security\TwoFactor\TwoFactorFirewallConfig {#842 …}
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -twoFactorAccessDecider: Scheb\TwoFactorBundle\Security\Authorization\TwoFactorAccessDecider {#581 …}
}
 0.08 ms (none) 
Symfony\Component\Security\Http\Firewall\AccessListener {#579
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -accessDecisionManager: Symfony\Component\Security\Core\Authorization\TraceableAccessDecisionManager {#937 …}
  -map: Symfony\Component\Security\Http\AccessMap {#722 …}
}
 0.00 ms (none) 
Symfony\Component\Security\Http\Firewall\LogoutListener {#786
  -tokenStorage: Symfony\Component\Security\Core\Authentication\Token\Storage\UsageTrackingTokenStorage {#1018 …}
  -options: [
    "csrf_parameter" => "_csrf_token"
    "csrf_token_id" => "logout"
    "logout_path" => "app_logout"
  ]
  -httpUtils: Symfony\Component\Security\Http\HttpUtils {#841 …}
  -csrfTokenManager: Symfony\Component\Security\Csrf\CsrfTokenManager {#1015 …}
  -eventDispatcher: Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher {#747 …}
}
 0.00 ms (none)

Authenticators

No authenticators have been recorded. Check previous profiles on your authentication endpoint.

Access Decision

affirmative Strategy
# Voter class
1 
"Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter"
2 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
3 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
4 
"Symfony\Component\Security\Core\Authorization\Voter\ExpressionVoter"
5 
"App\Security\Voter\EntryCommentVoter"
6 
"App\Security\Voter\EntryVoter"
7 
"App\Security\Voter\MagazineVoter"
8 
"App\Security\Voter\MessageThreadVoter"
9 
"App\Security\Voter\MessageVoter"
10 
"App\Security\Voter\NotificationVoter"
11 
"App\Security\Voter\OAuth2UserConsentVoter"
12 
"App\Security\Voter\PostCommentVoter"
13 
"App\Security\Voter\PostVoter"
14 
"App\Security\Voter\UserVoter"

Access decision log

# Result Attributes Object
1 DENIED ROLE_USER 
null
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
2 DENIED moderate 
App\Entity\EntryComment {#1369
  +user: Proxies\__CG__\App\Entity\User {#1370 …}
  +entry: App\Entity\Entry {#1832 …}
  +magazine: App\Entity\Magazine {#313
    +icon: Proxies\__CG__\App\Entity\Image {#294 …}
    +name: "asklemmy@lemmy.world"
    +title: "asklemmy"
    +description: """
      A Fediverse community for open-ended, thought provoking questions\n
      -----------------------------------------------------------------\n
      \n
      ---\n
      \n
      **Rules: (interactive)**\n
      ------------------------\n
      \n
      ---\n
      \n
      1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can’t say something nice, don’t say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. [Please familiarize yourself with them](https://legal.lemmy.world/tos/)\n
      \n
      ---\n
      \n
      2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?\n
      \n
      ---\n
      \n
      3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.\n
      \n
      ---\n
      \n
      4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [!asklemmyafterdark@lemmy.world](https://lemmy.world/c/asklemmyafterdark) or [!asklemmynsfw@lemmynsfw.com](https://lemmynsfw.com/c/asklemmynsfw). NSFW comments should be restricted to posts tagged [NSFW].\n
      \n
      ---\n
      \n
      5) This is not a support community.It is not a place for ‘how do I?’, type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to [Lemmy.world Support](https://lemmy.world/c/support) or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.\n
      \n
      ---\n
      \n
      Reminder: The [terms of service](https://legal.lemmy.world/tos/) apply here too.\n
      \n
      Partnered Communities:\n
      ----------------------\n
      \n
      [Tech Support](/c/techsupport@lemmy.world)\n
      \n
      [No Stupid Questions](/c/nostupidquestions@lemmy.world)\n
      \n
      [You Should Know](/c/youshouldknow@lemmy.world)\n
      \n
      [Reddit](/c/reddit@lemmy.world)\n
      \n
      [Jokes](/c/jokes@lemmy.world)\n
      \n
      [Ask Ouija](/c/askouija@lemmy.world)\n
      \n
      ---\n
      \n
      Logo design credit goes to: [tubbadu](/u/tubbadu@lemmy.world)\n
      \n
      ---\n
      \n
      ![](https://img.shields.io/lemmy/asklemmy%40lemmy.world?logo=lemmy&label=Total%20Subscribers)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1179
    +entryCommentCount: 42676
    +postCount: 3
    +postCommentCount: 67
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729583245 {#321
      date: 2024-10-22 09:47:25.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#285 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#281 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#270 …}
    +entries: Doctrine\ORM\PersistentCollection {#228 …}
    +posts: Doctrine\ORM\PersistentCollection {#186 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#248 …}
    +bans: Doctrine\ORM\PersistentCollection {#165 …}
    +reports: Doctrine\ORM\PersistentCollection {#151 …}
    +badges: Doctrine\ORM\PersistentCollection {#129 …}
    +logs: Doctrine\ORM\PersistentCollection {#119 …}
    +awards: Doctrine\ORM\PersistentCollection {#108 …}
    +categories: Doctrine\ORM\PersistentCollection {#95 …}
    -id: 49
    +apId: "asklemmy@lemmy.world"
    +apProfileId: "https://lemmy.world/c/asklemmy"
    +apPublicUrl: "https://lemmy.world/c/asklemmy"
    +apFollowersUrl: "https://lemmy.world/c/asklemmy/followers"
    +apInboxUrl: "https://lemmy.world/inbox"
    +apDomain: "lemmy.world"
    +apPreferredUsername: "asklemmy"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1729583301 {#322
      date: 2024-10-22 09:48:21.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1697177027 {#316
      date: 2023-10-13 08:03:47.0 +02:00
    }
  }
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +body: """
    The statistic you’re looking for is energy density. It’s usually expressed as Watthour per kilo(Wh/kg). Li-ion batteries are somewhere around 300Wh/kg, or about 1 megajoule though less if you’re making it into a building.\n
    \n
    Lifting a big weight provides you with Mass x 9.81 x Height amount of joules. So lifting 1 kg for 100m gives you 1x10x100~ 1 kilojoule.\n
    \n
    So, to charge my 300kg, 32.000 Wh Nissan leaf battery (130Wh/kg, what you get when you actually build batteries in the real world), you would need to lift a mass of 115tons to 100 meters. So to charge a single car, at 100% efficiency, you need to lift 72 entire cars. Just so I can drive to work and back. And real-world efficiency is far below 100%, just think of the friction.\n
    \n
    I think you’ve spotted the reason why we don’t actually build gravity batteries. Imagine lifting 115 tons to 100m, that requires a massive crane, itself weighting nearly half that. That’s why all gravity storage in existence basically consists of pumping water uphill, onto pre-existing mountains and lakes that nobody had to fabricate out of concrete and steel.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1701007830 {#1605
    date: 2023-11-26 15:10:30.0 +01:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@ProfessorGumby@midwest.social"
    "@Hypx@kbin.social"
    "@OwenEverbinde@lemmy.myserv.one"
    "@Mister_Rogers@kbin.social"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2356 …}
  +nested: Doctrine\ORM\PersistentCollection {#2355 …}
  +votes: Doctrine\ORM\PersistentCollection {#2428 …}
  +reports: Doctrine\ORM\PersistentCollection {#2436 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2490 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2409 …}
  -id: 166243
  -bodyTs: "'1':29,58,65 '100':100,109,135 '100m':61,161 '115':158 '115tons':98 '130wh/kg':77 '1x10x100':64 '300kg':71 '300wh/kg':26 '32.000':72 '72':115 '9.81':50 'actual':83,152 'amount':53 'around':25 'back':126 'basic':180 'batteri':22,76,85,155 'big':43 'build':40,84,153 'car':107,117 'charg':69,104 'concret':200 'consist':181 'crane':166 'densiti':9 'drive':122 'effici':110,131 'energi':8 'entir':116 'exist':179,189 'express':13 'fabric':197 'far':133 'friction':140 'get':80 'give':62 'graviti':154,176 'half':170 'height':52 'imagin':156 'ion':21 'joul':55 'kg':59 'kilo':17 'kilojoul':66 'lake':192 'leaf':75 'less':32 'li':20 'li-ion':19 'lift':41,57,94,114,157 'look':5 'make':36 'mass':48,96 'massiv':165 'megajoul':30 'meter':101 'mountain':190 'near':169 'need':92,112 'nissan':74 'nobodi':194 'onto':186 'per':16 'pre':188 'pre-exist':187 'provid':45 'pump':183 're':4,35 'real':88,129 'real-world':128 'reason':147 'requir':163 'singl':106 'somewher':24 'spot':145 'statist':2 'steel':202 'storag':177 'think':137,142 'though':31 'ton':159 'uphil':185 'usual':12 've':144 'water':184 'watthour':15 'weight':44,168 'wh':73 'wh/kg':18 'work':124 'world':89,130 'would':91 'x':49,51"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://sh.itjust.works/comment/5958870"
  +editedAt: DateTimeImmutable @1701668792 {#1945
    date: 2023-12-04 06:46:32.0 +01:00
  }
  +createdAt: DateTimeImmutable @1701007830 {#1368
    date: 2023-11-26 15:10:30.0 +01:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
App\Entity\EntryComment {#1369
  +user: Proxies\__CG__\App\Entity\User {#1370 …}
  +entry: App\Entity\Entry {#1832 …}
  +magazine: App\Entity\Magazine {#313
    +icon: Proxies\__CG__\App\Entity\Image {#294 …}
    +name: "asklemmy@lemmy.world"
    +title: "asklemmy"
    +description: """
      A Fediverse community for open-ended, thought provoking questions\n
      -----------------------------------------------------------------\n
      \n
      ---\n
      \n
      **Rules: (interactive)**\n
      ------------------------\n
      \n
      ---\n
      \n
      1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can’t say something nice, don’t say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. [Please familiarize yourself with them](https://legal.lemmy.world/tos/)\n
      \n
      ---\n
      \n
      2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?\n
      \n
      ---\n
      \n
      3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.\n
      \n
      ---\n
      \n
      4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [!asklemmyafterdark@lemmy.world](https://lemmy.world/c/asklemmyafterdark) or [!asklemmynsfw@lemmynsfw.com](https://lemmynsfw.com/c/asklemmynsfw). NSFW comments should be restricted to posts tagged [NSFW].\n
      \n
      ---\n
      \n
      5) This is not a support community.It is not a place for ‘how do I?’, type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to [Lemmy.world Support](https://lemmy.world/c/support) or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.\n
      \n
      ---\n
      \n
      Reminder: The [terms of service](https://legal.lemmy.world/tos/) apply here too.\n
      \n
      Partnered Communities:\n
      ----------------------\n
      \n
      [Tech Support](/c/techsupport@lemmy.world)\n
      \n
      [No Stupid Questions](/c/nostupidquestions@lemmy.world)\n
      \n
      [You Should Know](/c/youshouldknow@lemmy.world)\n
      \n
      [Reddit](/c/reddit@lemmy.world)\n
      \n
      [Jokes](/c/jokes@lemmy.world)\n
      \n
      [Ask Ouija](/c/askouija@lemmy.world)\n
      \n
      ---\n
      \n
      Logo design credit goes to: [tubbadu](/u/tubbadu@lemmy.world)\n
      \n
      ---\n
      \n
      ![](https://img.shields.io/lemmy/asklemmy%40lemmy.world?logo=lemmy&label=Total%20Subscribers)
      """
    +rules: null
    +subscriptionsCount: 1
    +entryCount: 1179
    +entryCommentCount: 42676
    +postCount: 3
    +postCommentCount: 67
    +isAdult: false
    +customCss: null
    +lastActive: DateTime @1729583245 {#321
      date: 2024-10-22 09:47:25.0 +02:00
    }
    +markedForDeletionAt: null
    +tags: null
    +moderators: Doctrine\ORM\PersistentCollection {#285 …}
    +ownershipRequests: Doctrine\ORM\PersistentCollection {#281 …}
    +moderatorRequests: Doctrine\ORM\PersistentCollection {#270 …}
    +entries: Doctrine\ORM\PersistentCollection {#228 …}
    +posts: Doctrine\ORM\PersistentCollection {#186 …}
    +subscriptions: Doctrine\ORM\PersistentCollection {#248 …}
    +bans: Doctrine\ORM\PersistentCollection {#165 …}
    +reports: Doctrine\ORM\PersistentCollection {#151 …}
    +badges: Doctrine\ORM\PersistentCollection {#129 …}
    +logs: Doctrine\ORM\PersistentCollection {#119 …}
    +awards: Doctrine\ORM\PersistentCollection {#108 …}
    +categories: Doctrine\ORM\PersistentCollection {#95 …}
    -id: 49
    +apId: "asklemmy@lemmy.world"
    +apProfileId: "https://lemmy.world/c/asklemmy"
    +apPublicUrl: "https://lemmy.world/c/asklemmy"
    +apFollowersUrl: "https://lemmy.world/c/asklemmy/followers"
    +apInboxUrl: "https://lemmy.world/inbox"
    +apDomain: "lemmy.world"
    +apPreferredUsername: "asklemmy"
    +apDiscoverable: true
    +apManuallyApprovesFollowers: null
    +privateKey: null
    +publicKey: null
    +apFetchedAt: DateTime @1729583301 {#322
      date: 2024-10-22 09:48:21.0 +02:00
    }
    +apDeletedAt: null
    +apTimeoutAt: null
    +visibility: "visible             "
    +createdAt: DateTimeImmutable @1697177027 {#316
      date: 2023-10-13 08:03:47.0 +02:00
    }
  }
  +image: null
  +parent: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +root: Proxies\__CG__\App\Entity\EntryComment {#2451 …}
  +body: """
    The statistic you’re looking for is energy density. It’s usually expressed as Watthour per kilo(Wh/kg). Li-ion batteries are somewhere around 300Wh/kg, or about 1 megajoule though less if you’re making it into a building.\n
    \n
    Lifting a big weight provides you with Mass x 9.81 x Height amount of joules. So lifting 1 kg for 100m gives you 1x10x100~ 1 kilojoule.\n
    \n
    So, to charge my 300kg, 32.000 Wh Nissan leaf battery (130Wh/kg, what you get when you actually build batteries in the real world), you would need to lift a mass of 115tons to 100 meters. So to charge a single car, at 100% efficiency, you need to lift 72 entire cars. Just so I can drive to work and back. And real-world efficiency is far below 100%, just think of the friction.\n
    \n
    I think you’ve spotted the reason why we don’t actually build gravity batteries. Imagine lifting 115 tons to 100m, that requires a massive crane, itself weighting nearly half that. That’s why all gravity storage in existence basically consists of pumping water uphill, onto pre-existing mountains and lakes that nobody had to fabricate out of concrete and steel.
    """
  +lang: "en"
  +isAdult: false
  +favouriteCount: 2
  +score: 0
  +lastActive: DateTime @1701007830 {#1605
    date: 2023-11-26 15:10:30.0 +01:00
  }
  +ip: null
  +tags: null
  +mentions: [
    "@ProfessorGumby@midwest.social"
    "@Hypx@kbin.social"
    "@OwenEverbinde@lemmy.myserv.one"
    "@Mister_Rogers@kbin.social"
  ]
  +children: Doctrine\ORM\PersistentCollection {#2356 …}
  +nested: Doctrine\ORM\PersistentCollection {#2355 …}
  +votes: Doctrine\ORM\PersistentCollection {#2428 …}
  +reports: Doctrine\ORM\PersistentCollection {#2436 …}
  +favourites: Doctrine\ORM\PersistentCollection {#2490 …}
  +notifications: Doctrine\ORM\PersistentCollection {#2409 …}
  -id: 166243
  -bodyTs: "'1':29,58,65 '100':100,109,135 '100m':61,161 '115':158 '115tons':98 '130wh/kg':77 '1x10x100':64 '300kg':71 '300wh/kg':26 '32.000':72 '72':115 '9.81':50 'actual':83,152 'amount':53 'around':25 'back':126 'basic':180 'batteri':22,76,85,155 'big':43 'build':40,84,153 'car':107,117 'charg':69,104 'concret':200 'consist':181 'crane':166 'densiti':9 'drive':122 'effici':110,131 'energi':8 'entir':116 'exist':179,189 'express':13 'fabric':197 'far':133 'friction':140 'get':80 'give':62 'graviti':154,176 'half':170 'height':52 'imagin':156 'ion':21 'joul':55 'kg':59 'kilo':17 'kilojoul':66 'lake':192 'leaf':75 'less':32 'li':20 'li-ion':19 'lift':41,57,94,114,157 'look':5 'make':36 'mass':48,96 'massiv':165 'megajoul':30 'meter':101 'mountain':190 'near':169 'need':92,112 'nissan':74 'nobodi':194 'onto':186 'per':16 'pre':188 'pre-exist':187 'provid':45 'pump':183 're':4,35 'real':88,129 'real-world':128 'reason':147 'requir':163 'singl':106 'somewher':24 'spot':145 'statist':2 'steel':202 'storag':177 'think':137,142 'though':31 'ton':159 'uphil':185 'usual':12 've':144 'water':184 'watthour':15 'weight':44,168 'wh':73 'wh/kg':18 'work':124 'world':89,130 'would':91 'x':49,51"
  +ranking: 0
  +commentCount: 0
  +upVotes: 0
  +downVotes: 0
  +visibility: "visible             "
  +apId: "https://sh.itjust.works/comment/5958870"
  +editedAt: DateTimeImmutable @1701668792 {#1945
    date: 2023-12-04 06:46:32.0 +01:00
  }
  +createdAt: DateTimeImmutable @1701007830 {#1368
    date: 2023-11-26 15:10:30.0 +01:00
  }
}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
4 DENIED moderate 
App\Entity\EntryComment {#1369
  +user: Proxies\__CG__\App\Entity\User {#1370 …}
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  +magazine: App\Entity\Magazine {#313
    +icon: Proxies\__CG__\App\Entity\Image {#294 …}
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      A Fediverse community for open-ended, thought provoking questions\n
      -----------------------------------------------------------------\n
      \n
      ---\n
      \n
      **Rules: (interactive)**\n
      ------------------------\n
      \n
      ---\n
      \n
      1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can’t say something nice, don’t say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. [Please familiarize yourself with them](https://legal.lemmy.world/tos/)\n
      \n
      ---\n
      \n
      2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?\n
      \n
      ---\n
      \n
      3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.\n
      \n
      ---\n
      \n
      4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [!asklemmyafterdark@lemmy.world](https://lemmy.world/c/asklemmyafterdark) or [!asklemmynsfw@lemmynsfw.com](https://lemmynsfw.com/c/asklemmynsfw). NSFW comments should be restricted to posts tagged [NSFW].\n
      \n
      ---\n
      \n
      5) This is not a support community.It is not a place for ‘how do I?’, type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to [Lemmy.world Support](https://lemmy.world/c/support) or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.\n
      \n
      ---\n
      \n
      Reminder: The [terms of service](https://legal.lemmy.world/tos/) apply here too.\n
      \n
      Partnered Communities:\n
      ----------------------\n
      \n
      [Tech Support](/c/techsupport@lemmy.world)\n
      \n
      [No Stupid Questions](/c/nostupidquestions@lemmy.world)\n
      \n
      [You Should Know](/c/youshouldknow@lemmy.world)\n
      \n
      [Reddit](/c/reddit@lemmy.world)\n
      \n
      [Jokes](/c/jokes@lemmy.world)\n
      \n
      [Ask Ouija](/c/askouija@lemmy.world)\n
      \n
      ---\n
      \n
      Logo design credit goes to: [tubbadu](/u/tubbadu@lemmy.world)\n
      \n
      ---\n
      \n
      ![](https://img.shields.io/lemmy/asklemmy%40lemmy.world?logo=lemmy&label=Total%20Subscribers)
      """
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  +body: """
    The statistic you’re looking for is energy density. It’s usually expressed as Watthour per kilo(Wh/kg). Li-ion batteries are somewhere around 300Wh/kg, or about 1 megajoule though less if you’re making it into a building.\n
    \n
    Lifting a big weight provides you with Mass x 9.81 x Height amount of joules. So lifting 1 kg for 100m gives you 1x10x100~ 1 kilojoule.\n
    \n
    So, to charge my 300kg, 32.000 Wh Nissan leaf battery (130Wh/kg, what you get when you actually build batteries in the real world), you would need to lift a mass of 115tons to 100 meters. So to charge a single car, at 100% efficiency, you need to lift 72 entire cars. Just so I can drive to work and back. And real-world efficiency is far below 100%, just think of the friction.\n
    \n
    I think you’ve spotted the reason why we don’t actually build gravity batteries. Imagine lifting 115 tons to 100m, that requires a massive crane, itself weighting nearly half that. That’s why all gravity storage in existence basically consists of pumping water uphill, onto pre-existing mountains and lakes that nobody had to fabricate out of concrete and steel.
    """
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    "@Mister_Rogers@kbin.social"
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    date: 2023-12-04 06:46:32.0 +01:00
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    date: 2023-11-26 15:10:30.0 +01:00
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS DENIED 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
5 DENIED edit 
App\Entity\Magazine {#313
  +icon: Proxies\__CG__\App\Entity\Image {#294 …}
  +name: "asklemmy@lemmy.world"
  +title: "asklemmy"
  +description: """
    A Fediverse community for open-ended, thought provoking questions\n
    -----------------------------------------------------------------\n
    \n
    ---\n
    \n
    **Rules: (interactive)**\n
    ------------------------\n
    \n
    ---\n
    \n
    1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can’t say something nice, don’t say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. [Please familiarize yourself with them](https://legal.lemmy.world/tos/)\n
    \n
    ---\n
    \n
    2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?\n
    \n
    ---\n
    \n
    3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.\n
    \n
    ---\n
    \n
    4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either [!asklemmyafterdark@lemmy.world](https://lemmy.world/c/asklemmyafterdark) or [!asklemmynsfw@lemmynsfw.com](https://lemmynsfw.com/c/asklemmynsfw). NSFW comments should be restricted to posts tagged [NSFW].\n
    \n
    ---\n
    \n
    5) This is not a support community.It is not a place for ‘how do I?’, type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to [Lemmy.world Support](https://lemmy.world/c/support) or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.\n
    \n
    ---\n
    \n
    Reminder: The [terms of service](https://legal.lemmy.world/tos/) apply here too.\n
    \n
    Partnered Communities:\n
    ----------------------\n
    \n
    [Tech Support](/c/techsupport@lemmy.world)\n
    \n
    [No Stupid Questions](/c/nostupidquestions@lemmy.world)\n
    \n
    [You Should Know](/c/youshouldknow@lemmy.world)\n
    \n
    [Reddit](/c/reddit@lemmy.world)\n
    \n
    [Jokes](/c/jokes@lemmy.world)\n
    \n
    [Ask Ouija](/c/askouija@lemmy.world)\n
    \n
    ---\n
    \n
    Logo design credit goes to: [tubbadu](/u/tubbadu@lemmy.world)\n
    \n
    ---\n
    \n
    ![](https://img.shields.io/lemmy/asklemmy%40lemmy.world?logo=lemmy&label=Total%20Subscribers)
    """
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    date: 2023-10-13 08:03:47.0 +02:00
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}
 
"Scheb\TwoFactorBundle\Security\Authorization\Voter\TwoFactorInProgressVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\EntryVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MagazineVoter"
 ACCESS DENIED 
"App\Security\Voter\MessageThreadVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\MessageVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\NotificationVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\OAuth2UserConsentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostCommentVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details