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Questions in physics

[Open]What is the opposite of sublimation?

[Open]Explain what happens to particles in diffusion. What causes diffusion?

[Open]How do bullet trains and circuit breakers work based on the magnetic effect of current?

[Open]A 50 kg box is at rest on a horizontal surface. When an 80 N force is applied to the box, it slides on the surface with a constant velocity. How will the force of friction change if an identical box is placed on top of the 50 kg box?

[Open]What is the acceleration of an 18 kg mass pushed by a 9 N force?

[Open]What's the difference between a wavelength and an amplitude?

[Open]The faster an object moves, the more ______ energy it has.

[Open]Why does a steel ship become magnetized as it is constructed?

[Open]A 1000 kg satellite travels with an orbital speed of 500 m/s around a planet at an orbital radius of 8000 km. What is the mass of the planet?

[Open]Pat found a wooden box in his grandparents’ garage. The top was nailed shut. He used a crowbar to pry off the top. What type of simple machine did Pat use?