Maand 35. A 10-kg rubuer blocks pulled horizontally at con-
stant velocity across a sheet of ice. Calculate the
magnitude of the force of friction acting on the block.
[Show all work, including the equation and substitu-
tion with units.]
lokg

What is the frequency of a light wave with a wavelength of 620nm

Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.

Name three different units of energy used to measure heat and describe what type of situations each is usually used.