A bubble originating at the bottom of a lake rises to the surface within 10.0 seconds with an acceleration of 10.0 meters/second2. What is the depth of the lake?

Question

anonymous · Answer

draw me a picture! :)

anonymous · Answer

No fun... Anyway, use the first equation of motion.
Displacement, the depth of the lake, is the unknown, but you know the initial velocity (0m/s), the acceleration, and the time it took to get from the bottom of the lake to the top. Plug and chug :)

anonymous · Answer

$$d =\cancel{v_ot}^0 + \frac{1}{2}at^2
\ h = \frac{1}{2}at^2$$

anonymous · Answer

sorry i was finishing a test didnt see the notifacation i founf the answer lol ^.^ but thanks for help me medl you ^o^

anonymous · Answer

^^ thanks!

anonymous · Answer

no no biggy ^.^

anonymous · Answer

phyisics is confusing :/

anonymous · Answer

very.  Agreed; it's always easier when there's a picture methinks though.  At least then it feels like scribbling might bring about some insight >_>

anonymous · Answer

XD yes yes i completly agree ummm can you help me its a 72 question test an im only on 32 an its very very hard :(

anonymous · Answer

sure :)

anonymous · Answer

If a magnet is put inside one coil of wire, a voltage is produced. What will happen if the magnet is put inside two coils of wire?

anonymous · Answer

There will not be a change.




B.
The voltage will decrease by a factor of two.




C.
The voltage will increase by a factor of two. 




D.
The two coils of wire will cancel out the magnetic field.




E.
The voltage will be zero.