Why is sea-floor spreading and deep-ocean trenches similar?

You must exert a force of 4.5N on a book to slide it across a table. If you do 3.7J of work in the process, how far have you moved the book?

What is the kinetic energy of a 400kg house that is racing around a track at 17 meters per second?

A 5.0 kg object moving at 10 m/s on a frictionless surfaces collides with but does not stick to a 2.0 kg object that is initially at rest. The force on the 2 kg ball has a magnitude of 2000 N and it lasts for 0.01 s.

You are given four springs, one each of 3.5 , 6 , 8.5 , and 11 newtons per meter [N/m]. How do I find the smallest equivalent stiffness that can be made using only three of these springs?

A rock has a height of 4 cm, a length of 5 cm, and a width of 2 cm. what is the volume of the rock?

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?