A 0.005kg bullet is fired at 400m/s east at a 12kg block at rest. If the bullet bounces off the block and travels at 150m/s west, what is the velocity of the block?

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

What is the temperature in degrees celsius of a substance with a tempature of 49k

The ozone hole appears in antarctica during