Which explains the greenhouse effect? A.Greenhouse gases like water vapor and carbon dioxide release heat in the atmosphere, thereby radiating heat energy back into space.


B.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back to the surface.


C.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space.


D.Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space.

Answers

Answer 1
Answer: Since greenhouse gases are a main cause of global warming, so the answer must be B.


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The five factors of production include land, _______, capital, entrepreneurship, and _______.a. effort; educationc. energy; applicationb. knowledge; effortd. labor; knowledge
Does anyone understand the Circuit Analysis paper. I'm completely lost. If anyone can help, PLEASE DO!!!
A lake several streams and rivers that take water away from it.  Does the lake contain freshwater or saltwater?
What kind of friction exists between solid objects moving in water?

A car slams on its breaks,producing friction between the tires and the road.Into which type of energy is the mechanical energy of the car converted?

Answers

the answer is Heat Energy

its is turning into electrical energy

A coin is placed in an empty beaker. When a transparent liquid is poured into the beaker, the apparent depth of the coin is found to be 40% less than the real depth. What is the refractive index of the liquid? The options for the answer are 0.4 / 0.6 / 1.2 / 1.7

Answers

Answer:

D. 1.7

Explanation:

Refractive index can be calculated using the formula;

η =real depth/apparent depth

Assume the real depth to be-----x

Apparent depth will be : 40% less than real depth;

60/100 *x =0.6x

η = x/ 0.6 x

η = 1/0.6

η= 10/6

η = 1.66

η = 1.7

What is the frequncy of a wave that has a speed of 8m/s and a wave length of 2?

Answers

v = f \times λ

v = 8m/s

λ = 2

f = v \div λ

f = 8 \div 2

f = 4hz

Which phase of matter has a fixed volume, but variable shape?

Answers

Solids don't change their shape, and gases have no fixed volume. So the answer must be the LIQUID phase.
The phase of matter that has a fixed volume and variable shape would be solids. 

Air, liquid, and gas all have variable shapes. Air can be compressed and put inside of can, so the shape of it changes. Liquid can be poured and can take the shape of whatever type of container it is in. Gas is the same way and it can take any shape. 

Cosmic inflation refers to ____(A) the current period of cosmic acceleration.(B) stellar winds creating bubbles of gas.(C) the Universe filling up with hydrogen gas.(D) a brief early period of hyperrapid expansion of space-time. (E) the ongoing expansion of the Universe.

Answers

Answer:

(D) a brief early period of hyper rapid expansion of space-time.

Explanation:

Cosmic inflation is a theory which states that in an interval of 10⁻³⁶ seconds to around 10⁻³³ seconds after the big bang there was a massive expansion.

According to the big bang theory the universe came to be from a singularity i.e., a point of infinite gravitational field. The universe is expanding this means that according to the conservation of energy the universe was expanding from the beginning.

The star α centauri c and the star groombridge 34 b have the same apparent magnitude, but α centauri c is 1.3 pc away from earth and groombridge 34 b is 3.5 pc away. what is the luminosity of groombridge 34 b compared with α centauri c?

Answers

Answer:

It can be concluded that groombrige 34 b is more luminous than \alpha centauri c since they have the same apparent magnitude.

Explanation:

The apparent magnitude is the brightness that a star appears to have as seen from the earth.

This can variate as a consequence of the distance or radius of the star.

for example, if one of two stars has a bigger radius that a second one, the free mean path of the photons will be higher than in the smaller one, so the bigger one will be more luminous.

In the case of the distance, if for example, two motorbikes with its lights on are approaching an observer, but one of the motorbikes is at a greater distance, it will appear that is light is dimmer compared to the one that is closer. Even if both emit the same amount of light per unit of time.  

Therefore, it can be concluded that groombrige 34 b is more luminous than \alpha centauri c since they have the same apparent magnitude.