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Brilliant_brown [7]
3 years ago
10

Conserving energy makes which type of energy last longer?

Physics
1 answer:
xeze [42]3 years ago
7 0
Finite ones (like fossil fuels). Renewables are there whether you use them or not.
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A swimmer swims 1000 m in the pool in 8.6 minutes. What was the average speed of the swimmer in m/s?
lawyer [7]

Speed = (distance covered) / (time to cover the distance)

Speed = (1,000 meters / 8.6 minutes) x (1 minute / 60 seconds) = 1.94 m/s
                                                                                                       (rounded)
6 0
3 years ago
Read 2 more answers
1. Which object has the greatest inertia?
Digiron [165]

Answer:

1.c,2.c,3.a,4.d

Explanation:

the following answer are listed with there number

7 0
3 years ago
Will give brainliest
user100 [1]

Answer:

I believe the answer is 2.5 N.......

7 0
3 years ago
How is the atomic mass of an atom determined?​
Ipatiy [6.2K]

Answer:

Atomic mass is defined as the number of protons and neutrons in an atom

5 0
2 years ago
Suppose we hang a heavy ball with a mass 13 kg (so the weight is ) from a steel wire 3.9 m long that is 3.1 mm in diameter (radi
Katena32 [7]

Answer:

1.635×10^-3m

Explanation:

Young modulus is the ratio of the tensile stress of a material to its tensile strain.

Young modulus = Tensile stress/tensile strain

Tensile stress = Force/Area

Given force = 130N

Area = Πr² = Π×(1.55×10^-3)²

Area = 4.87×10^-6m²

Tensile stress = 130/4.87×10^-6 = 8.39×10^7N/m²

Tensile strain = extension/original length

Tensile strain = e/3.9

Substituting in the young modulus formula given young modulus to be 2×10¹¹N/m²

2×10¹¹N/m² = 8.39×10^7/{e/3.9)}

2×10¹¹ = (8.39×10^7×3.9)/e

2×10¹¹e = 3.27×10^8

e = 3.27×10^8/2×10¹¹

e = 1.635×10^-3m

The stretch of the steel wire will be

1.635×10^-3m

7 0
3 years ago
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