Recent content by 29 clicks

I know its the first equation since i have all the information except for t, but I'm not good at rearranging question so can you help me just a bit more. Really appreciate it.

I know what you mean by if the materials are in position and not moving but i just need to know how you get the speed of sound from taking two points off (the echoes) a sound wave chart and calculating the speed of sound from that.

Can someone tell me how to calculate the speed of sound through measuring echoes. This is very new to me so I do not know where to begin. Appreciate any help. Links will help as well.

This is the second hardest question on my test, how long does it take to push a rock 10m. 50Kg rock 10 m is the distance 0.16m/s2 is the acceleration Does anyone know which kinematics equation I should use for this problem.

i got the answer now. its 0.16 m/s2 after correcting it.

ok i got 320N as my force of friction (from ff=uFn ff= 0.8x400N) then i use fnet= fapplied-ffriction to get 400-320=80 N use fnet in equation fnet=ma switch it around a= fnet/m a= 80N/50kg which equals 1.6 m/s2 am i right? correct me if I'm wrong please, appreciate it.

so do i multiply 0.8 (coefficient of friction) by 400 N?

I have this one problem solving question that confuses me. Someone pushes a 50kg rock a distance of 10m in a recent competition of strength. The coefficient of friction between the rock and the ground is 0.8 and the person exerts a force of 400 N. I've got my free body digram with my applied...

This is what i have so far. I = 200 A Car Mass = 360 kg F = 4200 N Q= ? I'm looking for the current required to lift the car. The only equation i know that can find is Q= I delta t and Q=Ne but i don't see how any of those equations would help. If you see something i can't then show me...

I have this question that I have been completely stuck on with the equations that i have and i was wondering if someone could help me with this question but what equation should i use first to get myself going. Someone drives an electromagnet at a junk yard. Normally the magnet uses 200 A...

Does anyone know where I can find information on the Left/Right Hand rule for Motor Principle, for Motor Principle not Electromagnetism because I know that one already. Appreciate any help given. Just need a link or even the concept of it.

I was wondering if someone could give me a link to a site that will discuss the left hand and right hand rule for a straight conductor and a helix.

Can someone explain to me what Law of Length because I have tried to look for it in my textbook and the Internet but have been unsuccessful, so if someone can give me a link to finding what Law of Length is or tell me what it is, it would really help.

Is the speed of a spring in a wave affected by changes in amplitude? If yes, describe. Is the speed of a spring in a wave affected by changes in frequency? If yes, describe.