Period and Frequency Practice

The frequency of an event is 90 Hz. What does this mean?

• The event happens once every 90 seconds

• The event happens 90 times every minute

• The event happens 90 times every second.

• The event happens once every 90 minutes

Tags

NGSS.MS-PS4-1

The period of an event is 0.2 s. What does this mean? (select all correct answers)

• The event happens once every 0.2 seconds.

• The event happens 0.2 times per second.

• The event happens 5 times per second.

• The event happens once every 5 seconds.

The frequency of an event is 0.5 min^-1 (1/min). What does that mean? (select all correct answers)

• The event happens 2 times per minute.

• The event happens 0.5 times per minute.

• The event happens every 0.5 minutes.

• The event happens every 2 minutes.

A hummingbird flaps its wings quickly, beating many many times in a second. Which of the following are true? (select all correct answers)

• The period is more than 1

• The period is less than 1

• The frequency is more than 1

• The frequency is less than 1

Tags

NGSS.HS-PS4-1

A pendulum swings slowly, completing very few cycles in 10 seconds. Which are true? (select all correct answers)

• The period is more than 1

• The period is less than 1

• The frequency is more than 1

• The frequency is less than 1

The period of an event is 20 s. What is its frequency?

• 20 times per second

• 20 seconds

• 0.05 times per second

• 0.05 seconds

The frequency of an event is 0.25 Hz. What is its period?

• 0.25 seconds

• 0.25 times per second

• 4 seconds

• 4 times per second

An event occurs 5 times in 50 s. What is its period?

• 0.1 Hz

• 0.1 s

• 10 Hz

• 10 s

Tags

NGSS.HS-PS4-1

An event occurs 20 times in 100 seconds. What is its frequency?

• 5 s

• 5 Hz

• 0.2 s

• 0.2 Hz

An event occurs 10 times in 200 seconds. What is its frequency?

• 20 s

• 20 Hz

• 0.05 s

• 0.05 Hz