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Alex17521 [72]
3 years ago
7

The red rocky planet with polar ice caps is __________.

Physics
1 answer:
gladu [14]3 years ago
5 0
The answer is D so mars hope i helped
:)
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Calculate the force generated by a car that hits the wall at an
Makovka662 [10]

This is a defective question. It was WRITTEN by someone who is unclear on the concepts.  DON'T try and answer it.

It's trying to get us to use Newton's second law ... F = m • a.

But that only tells us how much force must act ON THE CAR in order to accelerate it. (45 kg) • (4 m/s^2) = 180 newtons.

This is NOT the force exerted BY the car when it hits something. THAT force depends on its speed WHEN it hits, AND how long it takes for the wreckage to actually come to rest, AND how hard or soft the wall is.

DON'T try to answer this question. Your answer will be wrong, you won't understand why, and the teacher you try to argue with probably won't either.

============================================

More explanation:

Think about jumping off of a ladder in your back yard.  Several times.

Your mass is the same every time.  Your acceleration is the same every time . . . 9.8 m/s² down, the acceleration of Earth gravity, every time.

BUT ...

-- I'll bet you would rather land on wood than on concrete. The force of landing would be less.

-- I'll bet you would rather land on dirt than on wood. The force of landing would be less.

-- I'll bet you would rather land on grass than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a pile of blankets than on dirt. The force of landing would be less.

-- I'll bet you would rather land on a trampoline than on a pile of blankets. The force of landing would be less.

-- I'll bet you would rather jump from a short ladder than from a tall one.  Your speed would be less when you landed, and the force of landing would be less.

==> Your mass is the SAME every time, and your acceleration is the SAME every time.  But the force when you hit is DIFFERENT every time.

The mass and acceleration of the car DON'T tell us the force of the hit when the car hits a wall.  

6 0
3 years ago
Reactions
Lelechka [254]

Explanation:

                  H₂ + Cl₂→ 2HCl    chemical reaction

In a chemical reaction, a chemical change occurs when new kinds of products are formed. The products contains the atoms that are combining together and they obey the law of conservation of matter.

In a chemical reaction, elements, compounds and molecules are involved.

The reaction depicted is a typical combination or synthesis reaction in which two species reacts to form products. New compounds are formed

                   H + H → He + n     nuclear reaction

In a nuclear reaction, nuclides combines or they are disintegrated due to their instability.

The above reaction is a typical nuclear fusion reaction in which light hydrogen atoms combines to form a heavy nuclide of helium. The reaction involves the transmutation and production of new element.

Learn more:

chemical reaction brainly.com/question/3953793

Transmutation brainly.com/question/3433940

#learnwithBrainly

8 0
3 years ago
Hello people ~<br>Sound cannot travel through<br>(a) air<br>(b) water<br>(c) air<br>(d) vacuum​
SVETLANKA909090 [29]

Answer:

Vaccum

Explanation:

  • Sound travels through the particles of different matter
  • In vaccum there is no air so no matter and so no particles .
  • So sound can't travel through vaccum.

You can test it .

  • Take a speaker and keep it inside a bottle ,close it .
  • You won't hear any sound
7 0
2 years ago
Read 2 more answers
Which elements do hydrogen fuel cells combine to produce electricity?
Fynjy0 [20]

Answer:

Hydrogen and Oxygen i believe

Explanation:

7 0
3 years ago
Read 2 more answers
Find the three longest wavelengths (call them λ1, λ2, and λ3) that "fit" on the string, that is, those that satisfy the boundary
zepelin [54]
If you have a string that is fixed on both ends the amplitude of the oscillation must be zero at the beginning and the end of the string. Take a look at the pictures I have attached. It is clear that  our fundamental harmonic will have the wavelength of:
\lambda_1=\frac{L}{2}
All the higher harmonics are just multiples of the fundamental:
\lambda_n=n\lambda_1\\ \lambda_n=n\frac{L}{2}
Three longest wavelengths are:
n=3; \lambda_3=\frac{3L}{2}\\&#10;n=2; \lambda_2=L\\&#10;n=1; \lambda_=\frac{L}{2}\\&#10;

6 0
3 years ago
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