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4 years ago

Most responsible for the formation of a star is what force

Physics

1 answer:

Westkost [7]4 years ago

6 0

The correct answer is GRAVITATIONAL force.

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When you swim in a pool, Select one: a. rolling friction occurs. b. fluid friction occurs. c. sliding friction occurs. d. static

Oduvanchick [21]

Answer:

b. fluid friction occurs

Explanation:

Water is a liquid and both going through air gas and liquid cause fluid friction.

5 0

3 years ago

An unpolarized beam of light with an intensity of 4000 W/m2 is incident on two ideal polarizing sheets. If the angle between the

erastova [34]

Answer:

The intensity is $I_2 = 1654 \ W/m^2$

Explanation:

From the question we are told that

The intensity of the unpolarized light is $I_o = 4000 \ W/m^2$

The angle between the ideal polarizing sheet is $\theta = 0.429 \ rad = 0.429 * 57.296 = 24.58^o$

Generally the intensity of light emerging from the first polarizer is mathematically represented as

$I_2 = \frac{I_o}{2}$

substituting values

$I_1 = \frac{4000}{2}$

$I_1 = 2000 \ W/m^2$

Then the intensity of incident light emerging from the second polarizer is mathematically represented by Malus law as

$I_2 = I_1 cos^2 (\theta )$

substituting values

$I_2 = 2000 * [cos (24.58)]^2$

$I_2 = 1654 \ W/m^2$

4 0

4 years ago

Describe a scenario when you could use energy but not do any work.

Harlamova29_29 [7]

Answer:

When you don't move, you still use energy. This energy is called potential energy, or, stored energy.

When you don't move or do work, you can use energy.

4 0

3 years ago

Determine the value of V3 in volts where Vs = 15V, V1 = 5V, and V2 = 3V. Put the value of V3 in the box below without the units.

marshall27 [118]

Answer:

The value of V₃ is 7 V

enter value =7

Explanation:

Given that,

Source voltage $V_{s}=15 V$

First voltage $V_{1}=5V$

Second voltage $V_{2}=3V$

According to figure,

We need to calculate the value of third voltage

Using Kirchhoff voltage law

$V_{s}+V_{1}+V_{2}+V_{3}=0$

$-15+5+3+V_{3}=0$

$v_{3}=7\ V$

Hence, The value of V₃ is 7.

4 0

3 years ago

Newton observed the action of a prism on white and on red light. Because he did or did ot control the event, this investigation

MrRa [10]

Newton observed the action of a prism on the white light and on red light. Because he did not control the event, this investigation of light was an observational study.

3 0

3 years ago

Read 2 more answers