Other Physics Answers

At an amusement park,the pirate ship swingsback and forth every 20 seconds.

Period:

Frequency:

A. Narrow bridge oscillated up and down 5 times per second.

Period:

Frequency:

B. A tuning fork has a frequency of 252 Hz.

Period:

Frequency:

1. A very tall skycraper sways back and forth every 4.0 seconds.

Period:

Frequency:

2. A pendulum takes 0.5 second to complete one cycle.

Period:

Frequency:

1. A speaker vibrates at 200 cycles per second.

Period:

Frequency:

2. A smoke alarm battery is beeping 2 times per minute.

Period:

Frequency:

The focal point of a hyperopic eye is [Best

answer]

(A) on the retina.

(B) behind the retina.

(C) on the fovea.

(D) in front of the retina.

Converging lens can [ Best answer ]

(A) produce a magnified upright real image of an

object.

(B) be used to correct the myopia.

(C) be used to correct the astigmatism vision

defect.

(D) be used to correct the hyperopia.

A mass of 2.3 kg is initially moving at 5 m/s. A constant force of 15N is applied to the mass for 6 seconds. Find (a) the initial momentum, (b) final momentum.

A cheering squad is made up of three members: Lynne of 50kg moving at 3 m/sNorth. Angie of mass 58kg moving eastward at 3 m/s and Mercy of mass 6 kg moving at 3 m/s south. What is the combined momentum of the squad?

Use Kami in completing this activity.

The Sun has a mass of 2.0 x 10 to the power of 30 kg. Its

radius is 7.0 x 10 to the power of 8 meters. The gravitational

force between the sun and a section of the sun's surface is

470 N. What is the mass of this section?

If G one earth is 3kN. How much is m and G on the moon if the gravity there is 1.62m/s²