If a box is on a ramp and is motionless, what is true about the forces acting on the box? a. they are all equal. b. their net value is zero. c. they all add up to the weight of the box. d. the vertical forces are equal and opposite, and the forces up and down the ramp are equal and opposite.

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

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.

Question 1 of 15 2 points when doing science as inquiry, you should have some idea of what you think the final result will be. o a. true o b. false submit