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3 years ago

A string vibrates at a frequency of 20Hz. what is its period?

Physics

1 answer:

Andreas93 [3]3 years ago

7 0

We know, Period = 1/frequency = 1/20 sec.

So, your final answer is 0.05 sec

Hope this helps!

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Calculate the energy of a photon of electromagnetic radiation whose frequency is 2.94 x 10 to the 14th xbox one

DIA [1.3K]

Answer:

$1.95\cdot 10^{-19} J$

Explanation:

The energy of a photon is given by:

$E=hf$

where

$h=6.63\cdot 10^{-34}Js$ is the Planck constant

$f=2.94\cdot 10^{14} Hz$ is the frequency of the photon

Substituting the numbers into the equation, we find:

$E=(6.63\cdot 10^{-34} Js)(2.94\cdot 10^{14} Hz)=1.95\cdot 10^{-19} J$

3 0

2 years ago

g A simple pendulum (consisting of a point mass suspended by a massless string) on the surface of the earth has a period of 1.00

leonid [27]

Answer:

Explanation:

The formula for time period of a pendulum is given as follows :

T = 2π $\sqrt{\frac{l}{g} }$

l is length of pendulum and g is acceleration due to gravity .

So time period of pendulum is not dependent on the mass of the pendulum . If time period is same and length is also the same then acceleration due to gravity will also be the same . Hence the acceleration due to gravity at distant planet will be same as that on the earth.

5 0

3 years ago

1. A change in an object's speed has a(n) _________ effect on its kinetic energy than a change in its mass.

vredina [299]

A change in an object's speed has a(n) _________ effect on its kinetic energy than a change in its mass = <span>A greater effect.</span>

4 0

3 years ago

Read 2 more answers

What is a wave? Use the terms wavelength and frequency in your definition.

adelina 88 [10]

Explanation:

A wave is a disturbance in a medium. For example, when some pebbles are thrown in water, the water particles gets disturbed. A wave is characterized by the following parameters i.e.

Frequency

Wavelength etc

The number of oscillations or vibrations in a medium is called the frequency of a wave.

Also, the distance between two consecutive crests and troughs is called the wavelength of a wave. The relationship between the wavelength and the frequency of a wave is given by :

Speed of wave = frequency × wavelength

8 0

3 years ago

If a car is moving to the left with constantvelocity, one can conclude thatthere mustbe no forces applied to the car.the netforc

Allisa [31]

Answer:

the net force applied to the car is zero.

Explanation:

According to Newton's second law, the acceleration of an object (a) is directly proportional to the net force applied (F):

$a=\frac{F}{m}$

where m is the object's mass.

In this problem, the car is moving with constant velocity: this means that the acceleration is zero, a = 0. Therefore, according to the previous equation, the net force must also be zero: F = 0. So, the correct answer is

the net force applied to the car is zero.

3 0

3 years ago