# Search results

1. ### Snow homework

Explain how it is possible for 30,000 kg of snow at 0 deg C to contain more heat energy than 1 mL of liquid water a 100 deg C. ( Assume a pressure of one atomsphere).
2. ### Find energy dissipated due to air friction in a thrown ball

A 0.40 kg ball is thrown vertically upward with a speed of 30 m/s. The ball reaches a height of 40 m. Assuming g= 9.8 m/s^2, the energy dissipated due to air friction is : F=mgh m=0.40kg, g=10 m/s^2, h=40m, a= 30 m/s Not sure if I set this problem up right, and since everything is...
3. ### Compressed spring and Hooke's law

It is not pre-cal, the spring is compressed that obeys Hooke's law. Thanks for the quick responses. Goku I understand what you are saying. But Halls so Ivy I did not understand how you got 200x*2= 18
4. ### Compressed spring and Hooke's law

A compressed spring that obeys Hooke's law has a potential energy of 18 J . If the spring constant of the spring is 400 N/m, find the distance by which the sping is compressed. Please correct me if I am wrong, I'm not sure how find the distace. My work: k 400 N/m x=18J = 400 N/m/18...
5. ### Wood block sliding on 25 degree angle

f=UN = 6(0.4) not sure how to begin with this problem and how to find the coefficient
6. ### Wood block sliding on 25 degree angle

A wooden block slides directly down an inclined plane, at a constant velocity of 6 m/s. How large is the coefficient of kinetic friction, if the plane makes an angle of 25 degrees with the horizontal?
7. ### Acceleration force homework

HallsofIvy Thanks again for the instruction, that made more sense to me. Thanks in advance.
8. ### Minimum stopping distance problem

Thanks PN Hey PHYSICS NOOB, I really appreciate the help. I worked the problem before coming on the forum and did'nt think that I was doing it correct. Thanks in advance again and for the fast response.
9. ### Acceleration force homework

If a force accelerates 4.5 kg at 40 m/s ^2, that same force would accelerate 18 kg how much?
10. ### Minimum stopping distance problem

A load of steel of mass 6000kg rests on the flatbed of a truck. It is held in place by metal brackets that can exert a maximum horizontal force of 8000 N. When the truck is traveling 20 m/s, what is the minimum stopping distance if the load is not to slide forward into the cab?