An astronaut a long way from Earth takes a 500 g mass attaches a 1.5 m string to it and spins it around his head at a rate of 2 times a second. A. What is the speed of the mass?

B. What is the tension in the string?

What term do psychologists use to designate our personal awareness of feelings, sensations, and thoughts?

Inside of a windmill or a dam is a that is used to transform one type of energy into electrical energy. a. motor b. generator c. transformer d. power pack

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.