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3 years ago

13

On a trip to Italy, Cheyne rented a car to tour the country. As he turned onto the highway, he noticed that the speed limit was

95 km/h. How fast can Cheyne drive in mph?

1 answer:

KATRIN_1 [288]3 years ago

6 0

1 mile = 1.609344 km
x miles = 95 km
x = 95 : 1.609344 = 59.03
Answer: 53.09 mph

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How much heat is absorbed by 41 g iron skillet when its temperature varies from 9°C. to 20°C

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3 years ago

awhite billiard ball with mass mw = 1.47 kg is moving directly to the right with a speed of v = 3.01 m/s and collides elasticall

pochemuha

Answer:

speed of white ball is 1.13 m/s and speed of black ball is 2.78 m/s

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Explanation:

Since there is no external force on the system of two balls so here total momentum of two balls initially must be equal to the total momentum of two balls after collision

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momentum conservation along x direction

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$m_1v_{1i} + m_2v_{2i} = m_1v_{1y} + m_2v_{2y}$

now plug in all values in it

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so we have

$0 = 0.927v_1 - 0.375v_2$

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now from 1st equation we have

$3.01 = 0.375 v_1 + 0.927(2.47 v_1)$

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so speed of white ball is 1.13 m/s and speed of black ball is 2.78 m/s

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3 years ago