A brick of mass 5 kg is released from rest at a height of 3 m. How fast is it going when it hits the ground? Acceleration due to gravity is g = 9.8 m/s2.

A. 9.9 m/s

B. 8.1 m/s

C. 7.2 m/s

D. 7.7 m/s

What would a permanently magnetic substance be called?

Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.017 m. Water enters the hydrant through an underground pipe of radius 0.088 m. In this pipe the water has a speed of 2.7 m/s.

What distance is covered by an airplane traveling at a velocity of 660 miles per hour in 3.5 hours?

Consider the following statement: The magnitude of the buoyant force is equal to the weight of the amount of fluid that has the same total volume as the object. Under what circumstances is this statement true?

Power lines sag more between telephone poles in the summer than in winter. Explain why that is so.

What is root-mean-square current?

Which of these is an element? O carbon O air O carbon dioxide water

What could result if the liver was not working properly?

A machine gun fires 10 rounds per second. The speed of the bullets is 300 m/s. What is the distance between the flying bullets?

A runner with a mass of 75kg runs 6m/s calculate the kinetic energy stored in the runner