Physical Science Semester Exam 24-25

Front

What causes a feather to fall more slowly than a brick?

Back

Air resistance is the force that opposes the motion of an object through air, causing lighter objects like feathers to fall more slowly than heavier objects like bricks.

Front

How does energy from the sun travel to Earth?

Back

Energy from the sun travels to Earth as radiant energy, which is a form of electromagnetic radiation.

Front

What is the relationship between power (P), current (I), and voltage (V)?

Back

The relationship is given by the formula P = I × V, where power is the product of current and voltage.

Front

What is an example of a nonrenewable source of energy?

Back

Coal is an example of a nonrenewable source of energy, as it cannot be replenished in a short time frame.

Front

When will two objects attract one another?

Back

Two objects will attract one another when they have opposite charges.

Front

What is gravity?

Back

Gravity is the force that attracts two bodies towards each other, commonly experienced as the force that pulls objects towards the Earth.

Front

Define terminal velocity.

Back

Terminal velocity is the constant speed that a freely falling object eventually reaches when the resistance of the medium prevents further acceleration.

Front

What is radiant energy?

Back

Radiant energy is energy that travels in waves and can move through space, such as light from the sun.

Front

What is the formula for calculating power in an electrical circuit?

Back

The formula for calculating power is P = I × V, where P is power, I is current, and V is voltage.

Front

What are renewable energy sources?

Back

Renewable energy sources are energy sources that can be replenished naturally in a short period, such as solar, wind, and hydro energy.