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nekit [7.7K]
3 years ago
7

Please dont delete this question......

Physics
2 answers:
Juli2301 [7.4K]3 years ago
8 0

Answer:

c

Explanation:

rjkz [21]3 years ago
6 0

Answer:

C.

Explanation:

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This is the Doppler effect.

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Explain why wet clothes that are hung on a washing line dry best
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Because the sun evaporates the water out of the clothes
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2 years ago
A 5.31 kg object is swung in a vertical circular path on a string 2.99 m long. The acceleration of gravity is 9.8 m/s 2 . If the
11111nata11111 [884]

Answer:

T = 120.3 N

Explanation:

Since, the tension in the rope is acting against both the centripetal force and the weight of the stone. As both act downward towards center of the circle and tension acts towards point of support that is upward. So, tension will be equal to the sum of centripetal force and weight of the stone:

Tension = Centripetal Force + Weight of Stone

T = mv²/r + mg

where,

m = mass of stone = 5.31 kg

r = radius of circle = length of string = 2.99 m

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Therefore,

T = (5.31 kg)(6.2 m/s)²/(2.99 m) + (5.31 kg)(9.8 m/s²)

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4 0
2 years ago
A car speeds over a hill past point A, as shown in the figure. What is the maximum speed the car can have at point A such that i
Lubov Fominskaja [6]

Answer:

11.8 m/s

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At the top of the hill, there are two forces on the car: weight force pulling down (towards the center of the circle), and normal force pushing up (away from the center of the circle).

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∑F = ma

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v = √(9.8 m/s² × 14.2 m)

v = 11.8 m/s

3 0
2 years ago
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