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3 years ago

A grandfather clock works by swinging a pendulum back and forth with a

Physics

1 answer:

allochka39001 [22]3 years ago

8 0

Answer:

For example, a wave with a time period of 2 seconds has a frequency of

1 ÷ 2 = 0.5 Hz.

Explanation:

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Can You Answer This

Alex Ar [27]

Think the answer is c

7 0

3 years ago

A plane monochromatic light wave is incident on a double slit as illustrated in Figure 37.1.

Juli2301 [7.4K]

Explanation:

The separation between the interference fringes on the screen increases because the distance of the screen from the slit is increased. Therefore option (a) is correct.

The separation between the interference fringes on the screen increases because the distance of the screen from the slit is increased, which is contradictory. Therefore option (b) is incorrect.

The separation between the interference fringes on the screen increases because the distance of the screen from the slit is increased, which is contradictory. Therefore option (c) is incorrect.

The separation between the interference fringes on the screen increases because the distance of the screen from the slit is increased, which is contradictory. Therefore option (d) is incorrect.

The separation between the interference fringes on the screen increases because the distance of the screen from the slit is increased, which is contradictory. Therefore option (e) is incorrect.

7 0

3 years ago

12) A horizontal force of 200 N is applied to move a 55-kg cart (initially at rest) across a 10 m level surface. What is the fin

WINSTONCH [101]

Hi there!

We can use the following:

W = ΔKE = F · d

Find the work done on the cart:

W = 200 · 10 = 2000 J

Now, this is equal to the change in kinetic energy of the object. Its initial kinetic energy is 0 J since it starts from rest, so:

2000J = KEf - KEi

KE is given as:

$KE = \frac{1}{2}mv^2$

2000J = 1/2(55)v²

4000 = 55v²

√(4000/55) = 8.53 m/s

3 0

3 years ago

The current in the electron beam of a typical video display terminal is 200 µa. How many electrons strike the screen each minute

noname [10]

The number of electrons strike the screen each minute when thee current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

<h3>How to calculate electric charge?</h3>

Electric charge is equal to the product of electricity current flowing and the total time. It can be given as,

$q=It$

Here, I is current and t is time.

The current in the electron beam of a typical video display terminal is 200 µa for one minute. Thus, the total charge is,

$q=200\times10^{-6}\text{ A}\times(60\text{ s})\\q=0.012\rm \;C$

The number of electron flow is the ratio of total charge to the charge of one electron. The charge on one electron is 1.6×10⁻¹⁹ C. Thus, the number of electron is,

$n=\dfrac{0.012}{1.6\times10^{-19}}\\n=7.5\times10^{16}$

Thus, the number of electrons strike the screen each minute when the current in the electron beam of a typical video display terminal is 200 µa is 7.5×10¹⁶.

Learn more about the electric charge here;

brainly.com/question/2373424

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3 0

3 years ago

Is the mechanical form of power different from the electrical form?

Artemon [7]

Yes there is a difference.

8 0

3 years ago