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Kryger [21]
3 years ago
8

Without the sun, life on earth would not exist. There would be no warmth, no plants, no animals, no night and day. To power itse

lf, the sun is constantly generating a nuclear reaction in its core, in which hydrogen nuclei are combined to form helium. This process is known as fusion, and __________ a massive amount of energy. A) absorbs B) divides C) reflects D) releases
Physics
2 answers:
Serggg [28]3 years ago
6 0

Answer:

The correct answer is D.

Explanation:

The light and heat that we receive from the Sun is the result of nuclear fusion reactions, described by hydrogen nuclei that collide with each other, and fuse giving rise to a heavier nucleus of helium releasing a large amount of energy.

The energy released by these reactions travels to Earth in the form of electromagnetic radiation.

Have a nice day!

Ganezh [65]3 years ago
4 0
D, releases a massive amount of energy as heat Hope this helps
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A tank is filled with an ideal gas at 400 K and pressure of 1.00 atm.
bekas [8.4K]

To find the temperature it is necessary to use the expression and concepts related to the ideal gas law.

Mathematically it can be defined as

PV=nRT

Where

P = Pressure

V = Volume

n = Number of moles

R = Gas constant

T = Temperature

When the number of moles and volume is constant then the expression can be written as

\frac{P_1}{T_1}=\frac{P_2}{T_2}

Or in practical terms for this exercise depending on the final temperature:

T_2 = \frac{P_2T_1}{P_1}

Our values are given as

T_1 = 400K\\P_1 = 1atm\\P_2 = 2atm

Replacing

T_2 = \frac{(2)(400)}{1}\\T_2 = 800K

Therefore the final temperature of the gas is 800K

6 0
2 years ago
_____ are placed on dangerous machinery to detect motion, light, heat, pressure, or another stimulus. Their presence helps prote
goblinko [34]

Answer;

-Sensors

-Sensors are placed on dangerous machinery to detect motion, light, heat, pressure, or another stimulus. Their presence helps protect operators from injury while working on machines.

Explanation;

-Machinery, safety and factory floor sensors and switches help workers become more productive, efficient, and safe.

-Hazardous machines and systems are frequently equipped with safety elements (safety doors) with a locking mechanism to protect the operator. Their function is to prevent hazardous machine functions if the safety door is not closed and locked and to keep the safety door closed and locked until the risk of injury has passed.

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3 years ago
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Estimate how many electrons there are in the human's body. asssume the mass is 70 kg. (hint: most of the atoms in your body have
Karolina [17]
How about 8 X 10 to the 100th power.
8 0
3 years ago
A box slides down a frictionless incline, gaining speed. The work done by the normal force n is _______.
jeka57 [31]

The work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.

<h3>What is normal force?</h3>

The force of contact is called the normal force. When the two surfaces are in contact with each other, then the normal force acts.

This force is applied by the solid bodies on each other in order to prevent the passing through each other.

A box slides down a frictionless incline, gaining speed. For this box, the value of work done by normal force has to be found out. Let's analyze the given condition.

  • The body is gaining the speed, which means there is a change in kinetic energy.
  • The change in kinetic energy is equal to the work done.
  • The friction force is the product of coefficient of the friction and normal force.
  • The friction force for the given case is zero. Thus, the normal force must be equal to the zero.

Thus, the work done by the normal force n when the box slides down a frictionless incline and gaining speed is zero.

Learn more about the normal force here;

brainly.com/question/10941832

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2 years ago
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Stress. Being alone. having nothing
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