A bumper has a non negligible mass. After a collision with an ideal spring, the spring is compressed to a distance of 90% of the value of its distance when the bumper's mass was negligible. Give a reasonable explanation for this decrease.

State Newton's third law of motion.

Give two reason why the priority has been given for the use biogas energy in nepal.

When demand for electric power is high, power company sometimes reduced the voltage, thereby producing a "brown-out." What is being saved?

How do simple machines make work easier? A. They reduce the speed of work. B. They increase the force needed to work. C. They increase the distance over which a force is applied. D. They add energy to the work.

A certain dielectric, with a dielectric constant 26, can withstand an electric field of 5 * 107 V/m. Suppose we want to use this dielectric to construct a 0.3 µF capacitor that can withstand a potential difference of 2000 V.

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.

How are electromagnetic waves different from matter waves?

A dc generator is the same as a (n) a. electric motor. b. ac generator. c. armature. d. electric current.

Which of the following best describes scientific knowledge A.) Durable B.) Absolute and never changing C.) Frequently varies