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zimovet [89]
3 years ago
5

A car starts from rest and accelerates uniformly over a time of 7.25 seconds for a distance of 210 m. Determine the acceleration

of the car. What is the variable Vi equal to?
Physics
1 answer:
lara31 [8.8K]3 years ago
8 0

Answer:

Acceleration is 7.990487515m/s²

Initial velocity is 0m.s

Explanation:

s=ut+(1/2)at²

210=0(7.25)+(1/2)a(7.25²)

210=26.28125a

∴a=7.990487515m/s²

'Vi' or 'u' is the inital speed. Since it starts from rest, this equals 0.

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What happens to the particles of a liquid when energy is removed from them?
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Answer:

D: The distance between the particles decreases

Explanation:

Taking away energy slows down molecules, like how you slow down when you are cold (I think)

3 0
4 years ago
If you tried to use a diverging lens as a magnifier by placing the object at the focal point, what type of image would be produc
gladu [14]

Answer:

Upright and smaller than the object

Explanation:

Diverging lens as the name suggests that the rays diverge after the refraction and do not meet in reality. A concave lens is called diverging lens. When there is refraction of light through a concave lens then the light bends away from the principal axis and hence never meet in reality but on tracing the rays backwards the rays appear to meet leading to the formation of a virtual image, which is erect and smaller than the object for an object placed at the focus of the lens.

Similar image is formed for any case when the object is between optical center and infinity.

7 0
4 years ago
What are some methods that astronomers use to study interstellar dust?
larisa [96]

Answer:

is to observe through the telescope, study stars inside of the nebula and sometime enhance he pcture to see the real color of the nebula. hopes this helps.

6 0
3 years ago
6. Four people are trying to help push and lift a refrigerator up a series of stairs. Jim pushes
professor190 [17]

Answer:

Net force due to all on the refrigerator is 400 N

Explanation:

As we know that two people are pushing the refrigerator while other two people are lifting the refrigerator

So net push force on the refrigerator is given as

F = F_1 + F_2

F = 60 + 210

F_1 = 270 N

Similarly net lift force on the refrigerator is given as

F = F_1' + F_2'

F = 200 + 95

F_2 = 295 N

Now net force on the refrigerator is given as

F_{net} =\sqrt{F_1^2 + F_2^2}

F_{net} = \sqrt{270^2 + 295^2}

F_{net} = 400 N

4 0
4 years ago
A car accelerates from 6.0 m/s to 18 m/s at a rate of 3.0 m/s2. How far does it travel while accelerating
AlekseyPX

Answer:

48m, hope this helps :)

4 0
4 years ago
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