Physical Science Midterm Test

Front

What is mechanical advantage?

Back

Mechanical advantage is the ratio of the output force produced by a machine to the input force applied to it. It indicates how much a machine multiplies force.

Front

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the current flowing through the wire, using more coils of wire, or using a core material with higher magnetic permeability.

Front

What happens to the pitch of a sound when the source moves away from you?

Back

The pitch of the sound appears lower when the source is moving away due to the Doppler effect.

Front

What is wavelength in the context of waves?

Back

Wavelength is the distance between two consecutive points that are in phase on a wave, such as crest to crest or trough to trough.

Front

What is frequency in wave motion?

Back

Frequency is the number of complete waves that pass a given point in one second, measured in hertz (Hz).

Front

What is amplitude in wave motion?

Back

Amplitude is the maximum displacement of points on a wave from its rest position, indicating the energy of the wave.

Front

What is the relationship between wavelength and frequency?

Back

Wavelength and frequency are inversely related; as the wavelength increases, the frequency decreases, and vice versa.

Front

What is the formula for calculating mechanical advantage in a pulley system?

Back

Mechanical Advantage (MA) = Load Force / Effort Force.

Front

What is the role of a core material in an electromagnet?

Back

The core material enhances the magnetic field produced by the electromagnet, making it stronger.

Front

What is the Doppler effect?

Back

The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.