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suter [353]
3 years ago
12

Which of the following is not considered an alternative source of energy?

Physics
1 answer:
SCORPION-xisa [38]3 years ago
3 0
The answer is d. Natural gas
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Astronomers determine that a certain square region in interstellar space has an area of approximately 2.4 \times 10^72.4×10 ​7 ​
mafiozo [28]

Answer:

1.5 × 10³⁶ light-years

Explanation:

A certain square region in interstellar space has an area of approximately 2.4 × 10⁷² ​​ (light-years)². The area of a square can be calculated using the following expression.

A = l²

where,

A is the area of the square

l is the side of the square

l = √A = √2.4 × 10⁷² ​​ (light-years)² = 1.5 × 10³⁶ light-years

5 0
3 years ago
A student claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only
Fofino [41]

if heat transferred to any phase that phase has had a heat transfer

8 0
3 years ago
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The force of gravity pulls down on your school with a total force of 400,000 newtons. The force of gravity pulling down on your
-BARSIC- [3]

Answer:

A

Explanation:

Force of gravity can be expressed as:

F = GMM/R^2

Where

F = gravitational force

M = mass

R = distance

Also, W = mg

From the above equation, we can deduce that force of gravity actually depends on mass and not volume.

The correct answer is therefore A.

Had twice as much mass

Therefore, the force of gravity pulls down on your school with a total force of 400,000 newtons. The force of gravity pulling down on your school would be exactly twice as much if your school Had twice as much mass

3 0
3 years ago
A__________is a small particle that is a building block of matter.
ch4aika [34]
Atom is the correct answer.
6 0
4 years ago
A 0.45 kg ball is moving horizontally with a speed of 5.3 m/s when it strikes a vertical wall. The ball rebounds with a speed of
qaws [65]

Answer:

1.31Kgms-1

Explanation:

∆p = m∆v

Where:

∆p= change in momentum

m= mass of the ball

∆v= change in velocity of the ball= (5.3-2.4)= 2.9ms-1

Therefore, substituting appropriately with the values above:

∆p= 0.45×2.9= 1.31Kgms-1

6 0
4 years ago
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