a golf ball of mass 50g travels at 70 m/s hits a persons head (stopping in 0.05 second), what is the impact force

5. For what purpose do bats use ultrasonic waves? O Doppler effect O sonar O echolocation O ultrasound

Blocks A (mass 2.00 kg) and B (mass 10.00 kg, to the right of A) move on a frictionless, horizontal surface. Initially, block B is moving to the left at 0.500 m/s and block A is moving to the right at 2.00 m/s.

Which of the following is likely to happen at a location that has fractured and porous rocks? Aquifers may form due to flowing river. Dunes may form due to glacial movement. Dunes may form due to erosion and deposition.

A wave moving with a speed of 3.0 m/s has a frequency of 9 Hz. What is the wavelength of the wave? A. 0.33 m B. 3.0 m C. 12 m D. 18 m

What is the difference between nuclear energy and light energy?

Which of the following is evidence that groundwater causes erosion and deposition?

Changing the direction of current will or will not affect the strength of an electromagnet

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter