When an ambulance drives by your house with sirens blaring, the sound waves of the sirens are (space) as it approaches and (space) as it sppeds away

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus