A student placed an ice cube on a table and observed it for five minutes. He noticed that the ice cube seemed to get smaller and was now surrounded by a small puddle of water. Explain what happened to the ice cube. Be sure to tell what caused the ice cube to change and how the puddle of water formed. When will the temperature of the ice cube stabilize?

A1000-kg car is moving at 30 m/s around a horizontal unbanked curve whose diameter is 0.20 km. what is the magnitude of the friction force required to keep the car from sliding?

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. what is the best explanation of the relationship between wavelength and wave energy? a) wave energy is related only to frequency, not wavelength. b) longer wavelengths have lower frequencies but higher energy. c) the shorter the wavelength, the lower the frequency and the higher the energy. d) the shorter the wavelength, the higher the frequency and the higher the energy.