In the setup shown, a student pulls a string attached to a block with a force of F. The string applies a force with a magnitude of 21,1 N the block in the upward direction . The block has a weight of 19.6

What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.