http://www.collegeboard.com/prod_downloads/ap/students/physics/ap04_frq_physics_b.pdf
Question # 4. I am studying for the AP test coming up pretty soon, and I am having a hard time with this question, waves and sound have always been a problem for me. I really don't know where to start...
ok well P = IV, P = V2 / r..
power is equal to a watt which equals a Joule/Second
600w equals 600 j/s if it goes 8.4 hours it would be 8 hours (60 minutes)+ 24 minutes (for the .4 hours) so that's 504 minutes every day, x 30 days equals 15120 minutes in 30 days. Now convert minutes to...
new Q...
A fridge uses 600w when running and operates 8.4 hours each day
a) how much energy in joules, does it use in 30 days?
b) what will it cost to operate for 30 days if it costs 8.3 cents/KwH
Alrighty i have some questions, as well as my possible answers. We have a worksheet that i hope to do correctly since the test will be here within a week or so. Anyways ill get to it
1) a resistance irreversibly converts electrical energy into
a) mechanical work
b) chemical energy
c) heat...
Im still confused on the orbital question..
would it look something like
v= √(6.67 x 10^-11)(7.36 x 10^22)
_________________________
1740km
im not sure what exactly what information to plug in... and it sucks for the last 2 questions we havn't covered how...
an elevator of mass M is suspended from a vertical cable. When the elevator is accelerating downward with an acceleration magnitude of 5.8 m/s^2, the tension in the cable is 3644N, what is the mass of the elevator?
I had a few ideas..
T - mg = ma
T = m(g + a)
T/(g+ a) = m
Or i was...