1st Semester Science Final Exam 100 Questions

Front

What is the speed of light compared to sound?

Back

Light waves are electromagnetic waves that travel much faster than mechanical waves, such as sound.

Front

What are electromagnetic waves?

Back

Electromagnetic waves are waves that can travel through a vacuum and do not require a medium, such as light.

Front

What is kinetic energy (KE)?

Back

Kinetic energy is the energy an object possesses due to its motion.

Front

What is potential energy (PE)?

Back

Potential energy is the stored energy of an object due to its position or state.

Front

What happens to potential and kinetic energy when a ball falls?

Back

Gravitational potential energy decreases, and kinetic energy increases.

Front

What is diffraction in terms of sound waves?

Back

Diffraction is the bending of waves around obstacles or through openings, allowing sound to be heard around corners.

Front

What is the relationship between kinetic energy and speed?

Back

Kinetic energy increases with the square of the speed of an object.

Front

What is the formula for kinetic energy?

Back

KE = 1/2 mv², where m is mass and v is velocity.

Front

What is the formula for gravitational potential energy?

Back

PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the difference between mechanical waves and electromagnetic waves?

Back

Mechanical waves require a medium to travel through, while electromagnetic waves do not.