Physics Final Review

Front

What does the law of conservation of momentum state?

Back

The law of conservation of momentum states that the total momentum of a closed system remains constant; that is, momentum before an event equals momentum after the event.

Front

What type of signal is characterized by discrete values?

Back

Digital signal.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object and does not change regardless of location, while weight is the force exerted by gravity on that mass and can change depending on the gravitational field.

Front

What happens to an electron when it absorbs a photon of light?

Back

The electron increases its energy level.

Front

What type of signal fluctuates exactly like the original signal?

Back

Analog signal.

Front

Define momentum in physics.

Back

Momentum is the product of an object's mass and its velocity, represented by the formula p = mv.

Front

What is the formula for calculating weight?

Back

Weight (W) is calculated using the formula W = mg, where m is mass and g is the acceleration due to gravity.

Front

What is the principle of superposition in waves?

Back

The principle of superposition states that when two or more waves overlap, the resulting wave displacement is the sum of the individual displacements.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated using the formula KE = 1/2 mv².

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, commonly calculated as PE = mgh, where h is height.