A 2,000kg car uses a braking force of 12,000 N to stop in 5 s What is the initial speed of the car?

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

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.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves