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mylen [45]
3 years ago
10

A student touches sphere x and moves it close to, but not touching sphere y. What are the natures of the charges left on the two

sphere?
Sphere X Sphere Y
A.positive positive
B.no charge no charge
C.positive negative
D.negative positive
Physics
1 answer:
e-lub [12.9K]3 years ago
7 0
No charge I know this because
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andrezito [222]

Answer:

centripetal acceleration of the ball is 6.9 m/s/s

tangential speed of the ball is 2.2 m/s

Explanation:

As we know that ball complete 5 rotations in 10 seconds

so frequency of rotation of ball is given as

f = \frac{5}{10} = 0.5 Hz

now we know that angular frequency is given as

\omega = 2\pi f

\omega = 2(\pi)(0.5)

\omega = \pi rad/s

Now centripetal acceleration is given as

a_c = \omega^2 R

a_c = \pi^2 (0.7)

a_c = 6.9 m/s^2

now the velocity of the ball at this angular frequency is given as

v = R\omega

v = 0.7 (\pi)

v = 2.2 m/s

4 0
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7. A runner increases his velocity from 0 m/s to 20 mis in 2 What is the runner's average acceleration?
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Answer:

w o r k*

Explanation:

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What is the formula of gravity force with its meaning ​
tester [92]

Answer:

he formula for the gravitational force includes the gravitational constant, which has a value . The unit of the gravitational force is Newtons (N). Fg = gravitational force between two objects ( ) G = gravitational constant ( ) m1 = mass of the first object (kg)

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3 years ago
Which is not one of the three forms of energy that travels to earth
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Is there options for this??
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A helicopter ambulance flew from one hospital to another in a straight line. The pilot had to change speed several times due to
Olenka [21]

Answer:

Explanation:

All the rest of the information is extraneous. The only 2 things you have to know are

d = 20 km

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Note: you have not specified what units the speed is. I suppose you could answer 20/8 = 2.5 km/min

4 0
3 years ago
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