Asurface by a 15.7 kg 72.2 n block is dragged over a rough, horizontal force acting at 21 ° above the horizontal. , and the coefficient of kinetic the block is displaced 4.5 m friction is 72.2 n force. (d) what is the increase in internal energy of the block surface system due to friction? (e) find the total change in the block's kinetic energy

Now that the first three steps have been explained, identify the next three steps, in order. calculate the magnitude of r sum vector components calculate a and b magnitudes calculate the direction of r, calculate x, y components step 4 step 5 step 6

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.

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