Physics, 18.07.2019 02:30, coxtinam16

How are gravitational and electric force alike? how are gravitational force and electric force different?

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: They both have infinite range (1/r^2 force, 1/r potential), which implies that the quanta of both fields (photons and gravitons) are massless--and implies that there are gravitational waves (we're looking for them, but they're tough to find because gravity is weak) and electromagnetic waves (which are ubiquitous) that propagate through space at a speed c.

Differences: Gravity couples to the stress energy tensor (which mostly means mass)/ EM couples to charge. There are two varieties of charge, which an EM field will pull in opposite directions. Gravity only acts one-way. The graviton has spin of at least 2. The photon has spin 1. EM has a coupling of 1/137 to unit charges. Gravity has unit coupling to particles with planck mass. Fundamental particles have much, much less mass than this, which is why we usually say gravity is very weak

answered: Guest

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

An object is located 5.0 cm from a convex lens. the lens focuses light at a distance of 10.0 cm. wha

answered: Guest

elly's long hair:

a. if the salon only takes cash, then this isn't the problem. it doesn't matter how much she has in her checking account. she can't get a haircut until she has the cash.

b. if she has overdraft protection, then there's no problem. she can go ahead and write a check that her account can't cover, then sometime later, pay the bank some outrageous usury for loaning her a few bucks for a few days, but with beautiful hair.

c. if elly has some principles, and doesn't want to write a bad check, then now she has a problem. her desire for the new hairstyle is in conflict with her honesty and integrity.

d. if the bank will not process a check she writes, then even if she had a million $$ in her account, she couldn't use any of it. the amount she has in her account is not the problem. and if i may suggest, she might as well close her checking account, and put the money where it'll work for her. it's not doing her a bit of good in a checking account, since she can't write any checks.

justin can't pay the full balance:

a. he can't even handle the credit limit he has now. under no circumstances should he ask for a higher limit.

b. he can ask for the grace period to be extended. but that's no solution, the bank will almost certainly refuse anyway, and there are much better options. he knew the rules of his credit card when he started using it.

c. he definitely should pay the interest on the balance, plus as much of the balance as he can cover at the same time.

d. he definitely should pay the minimum otherwise they could shut down his card. he should also pay as much more as he possibly can. he should also remember the awkward situation he's in, stop buying stuff on credit that he can't afford, and avoid adding any more debt.

i'd say that justin's best best option isn't on this list of choices. what he has to do: pay as much as he can at least the minimum payment plus as much more as he can and then avoid adding more debt.

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How are gravitational and electric force alike? how are gravitational force and electric force diff...