If you use a stick to push an object, the muscular force acting on it is a non contact force. True or false? Explain

Which term best describes how light interacts with a lens? O A. Interference O B. Refraction C. Reflection O O D. Diffraction

Most earthquakes occur in areas close to where tectonic plates meet. There are earthquakes in San Francisco. What can be concluded from this information? A) San Francisco is far away from an area where tectonic plates meet.

How long would it take to walk 10000 miles?

Can any ideal gas power cycle have a thermal efficiency greater than 55 percent when using thermal energy reservoirs at 627∘C at 17∘C? Explain. What is the maximum possible efficiency for such an engine?

A spring with a constant of 16 N/m has 98 J of energy stored in it when it is extended. How far is the spring extended?

A stretched spring has 5184 J of elastic potential energy and a spring constant of 16,200 N/m. What is the displacement of the spring?

A block of mass 1.3 kg is resting at the base of a frictionless ramp. A bullet of mass 50 g is traveling parallel to the ramp surface at 250 m/s. It collides with the block, enters it, and exits the other side at 100 m/s.

Metals are good thermal conductors - that is, when there is a temperature difference across their ends, they transfer energy very efficiently from the higher temperature end to the lower temperature end.

Some stars are so far away that their light hasn't reached Earth yet. A million years in the future, will the sources of light we see when we look up at night be the same? Why or Why not?

A sound wave travels through water. What best describes the direction of the water particles?