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3 years ago

8

An autographed baseball rolls off of a 0.91 m high desk and strikes the floor 0.84 m away from the desk. How fast was it rolling

on the desk before it fell off? The acceleration of gravity is 9.81 m/s2 .

1 answer:

Rudik [331]3 years ago

4 0

The initial velocity (its speed before falling off) is approximately 1.95 m/s

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You are driving a car with an automatic transmission; the shifter is mounted on the steering column. When you press down on the

castortr0y [4]

Answer:

From the narrative in the question, there seem to have been a break failure and the ordered step of response to this problem is to

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3 years ago

The three main types of nuclear radiation are alpha, beta, and gamma

valkas [14]

Answer:

Gamma beta alpha

Explanation:

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3 years ago

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What do we call the bright, sphere-shaped region of stars that occupies the central few thousand light-years of the milky way ga

Law Incorporation [45]

Answer: The galaxy's bulge

Explanation:

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2 years ago

Two identical satellites are in orbit about the earth. One orbit has a radius r and the other 2r. The centripetal force on the s

velikii [3]

Answer:

the centripetal force on the satellite in the larger orbit is _one fourth_ as that on the satellite in the smaller orbit.

Explanation:

Mass of satellite, m

orbit radius of first, r1 = r

orbit radius of second, r2 = 2r

Centripetal force is given by

$F= \frac{mv^{2}}{r}$

Where v be the orbital velocity, which is given by

$v=\sqrt{gr}$

So, the centripetal force is given by

$F= \frac{mgr}}{r}}=mg$

where, g bet the acceleration due to gravity

$g=\frac{GM}{r^{2}}$

So, the centripetal force

$F= \frac{GMm}}{r^{2}}}$

Gravitational force on the satellite having larger orbit

$F= \frac{GMm}{4r^{2}}$ .... (1)

Gravitational force on the satellite having smaller orbit

$F'= \frac{GMm}{r^{2}}$ .... (2)

Comparing (1) and (2),

F' = 4 F

So, the centripetal force on the satellite in the larger orbit is _one fourth_ as that on the satellite in the smaller orbit.

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3 years ago

I need help with this

lisabon 2012 [21]

A. Condensation

Hope this helps!!!

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2 years ago