a force of 20 N acted on a ball thereby imparting an impulse of 70 Ns to the ball. For how long did the force act on the ball?

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

Which of the following statements proves that scientific knowledge changed due to the discovery of the fossil of a hadrosaur in North Dakota? Hadrosaurs were better runners than earlier thought.

A major difference between AC and DC electricity is that A) the current in AC electricity varies in magnitude and direction. B) the current in DC electricity varies in magnitude and direction.

A curve has a radius of 50 meters and is banked 5 degrees. The road is covered with ice and is frictionless. What is the maximum speed, in mph, a car can travel and negotiate the curve? A.) 15.65mph B.) 25.00mph C.) 65.00mph D.) 6.55mph E.

A patient is given 40.00 mg of iodine-131 (131I) 131 53 The half-life of 53 I is 8 days. How many milligrams of the 131I remains in the patient after 32 days?

Does exists the friction force in space? If yes, tell an full example

Why are the transverse waves produced by an earthquake known as secondary wave?

The unit for measuring electric power is the A. volt. B. ampere. C. watt. D. ohm.

Which one of Newton's Laws fits this statement: More mass means more force need to accelerate?

What type of relationship occurs when one variable decreases while the other variable increases?