According to the principle of superposition, when two waves meet l, they

Reflect

Refract

Diffract

Interfere

Which activity can be termed as an economic activity?

The universal law of gravitation, written by Isaac,

A 50.0kg cheetah has a kinetic energy of 18,000J. how fast the cheetah running?

An elevator has a massif 1000 kg what is the tension force on its cables when it is stationary

The school is about 1500 m away. you run toward the school with an average velocity of 3 m per sec. how long did it take you to get to school in seconds

The height a ball bounces is less than the height of the previous bounce due to friction. The heights of the bounces form a geometric sequence. Suppose a ball is dropped from one meter and rebounds 95 % of the height of the previous bounce.

Five-gram samples of copper and aluminum are at room temperature. Both receive equal amounts of energy due to heat flow. The specific heat capacity of copper is 0.09 cal/g°C, and the specific heat capacity of aluminum is 0.22 cal/g°C.

A bullet travels at 870 m/s. How long will it take a bullets to go 1 m?

A 2.50 * 105 W motor is used for 26.4 s to pull a boat straight toward shore. How far does the boat move toward shore if a force of 4.20 * 104 N is applied by the motor?

Which type of wave experiences a change in speed when entering a new medium? a) only sound waves b) both sound and light waves c) only light waves d) neither sound or light waves