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katrin [286]
3 years ago
8

Question 1 of 15

Physics
1 answer:
Ierofanga [76]3 years ago
8 0

Answer:

d 75 miles per hour

Explanation:

60 ÷ 20

3 × 25 = 75

hoped that helped!!

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Similarities and differences between solar power and coal.
ira [324]
Solar power is renewable, which means it can be used again. However, coal is non-renewable, meaning that once it is used, it can't be used again.
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3 years ago
A hiker throws a ball at an angle of 21.0° above the horizontal from a hill 21.0 m high. The hiker’s height is 1.750 m. The magn
nydimaria [60]

Answer:

38.8 m

Explanation:

h = -(21 + 1.75) = - 22.75 m

g = - 9.8 m /s^2

Ux = 14.004 m/s

Uy = + 5.376 m/s

Let the ball hits the ground in time t and at a distance d from the base of hill.

Use second equation of motion

h = Uyt + 0.5 at^2

- 22.75 = 5.376 t - 0.5 x 9.8 t^2

4.9 t^2 - 5.376 t - 22.75 = 0

t=\frac{5.376\pm \sqrt{5.376^{2}+4\times 4.9\times 22.75}}{9.8}

By solving

t = 2.77 second

So, horizontal distance

d = Ux t

d = 14.004 x 2.77 = 38.8 m

6 0
3 years ago
The longer the lever, the greater the
Simora [160]

Answer: The longer the lever, the greater the force on the load will be.

Explanation:

4 0
3 years ago
Conservation of energy is explained as a scientific law and not a _______ because it does not explain why energy is conserved
AURORKA [14]

Answer:

Theory

Explanation:

Conservation of energy is explained as a scientific law and not a theory because it does not explain why energy is conserved.

A law is a the statement of a scientific fact. It is a product of repeated experiment and observation through time. Most laws do not explain the reason for the logic behind their premise.

A theory on the other hand provides an explanation for an observed phenomenon. Most theories are no immutable. They are often changed when new finds are reported or made.

Laws are immutable and they stand still.

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3 years ago
An intellectual disability that is environmental in origin has a specific physical cause.
Roman55 [17]
The answer to this is T
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4 years ago
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