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KonstantinChe [14]
4 years ago
6

A positive charge is placed within the sphere without touching it. You grounded the sphere by touching it with your finger. Then

you first removed your finger and then pulled the charge from inside the sphere, again without touching it. What is the remaining charge on the sphere?
Physics
1 answer:
zhuklara [117]4 years ago
3 0

Answer:

Negative

Explanation:

If a negatively charged object is used to charge a neutral object by induction, then the neutral object will acquire a positive charge. And if a positively charged object is used to charge a neutral object by induction, then the neutral object will acquire a negative charge:

We have a neutral sphere

1) Electrons are attracted to the positive charge

2) Electrons enter the sphere from ground, attrated to the + charge in the sphere

3) The sphere has an excess of e- having entered from the ground

4) Electrons redistribute uniformly

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Consider a bicycle wheel to be a ring of radius 30 cm and mass 1.5 kg. Neglect the mass of the axle and sprocket. If a force of
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To solve the problem it is necessary to apply the Torque equations and their respective definitions.

The Torque is defined as,

\tau = I \alpha

Where,

I=Inertial Moment

\alpha = Angular acceleration

Also Torque with linear equation is defined as,

\tau = F*d

Where,

F = Force

d= distance

Our dates are given as,

R = 30 cm = 0.3m

m = 1.5 kg

F = 20 N

r = 4.0 cm = 0.04 m

t = 4.0s

Therefore matching two equation we have that,

d*F = I\alpha

For a wheel the moment inertia is defined as,

I= mR2, replacing we have

d*F= \frac{mR^2a}{R}

d*F= mRa

a = \frac{rF}{ mR}

a = \frac{0.04*20}{1.5*0.3}

a=1.77 m/s^2

Then the velocity of the wheel is

V = a *t \\V=1.77*4 \\V=7.11 m/s

Therefore the correct answer is D.

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3 years ago
How does the height of a ramp affect the time it takes for an object to move down the ramp? please explain each one below:
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The greater the height of a ramp, the shorter the time it takes for an object to move down the ramp.

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An increase in volume of water increases the time it takes to boil and vice versa.

Increase in the length of the paper airplane, the farther it will fly.

Jumping Jack increases the heart rate.

<h3>How does the height of a ramp affect the time it takes for an object to move down the ramp?</h3>

A ramp is an inclined plane which is a form of simple machine that is used to lift heavy objects off the floor or to lower heavy objects down.

The greater the height of a ramp, the shorter the time it takes for an object to move down the ramp due to increased acceleration.

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The addition of solutes to pure solvent raises the boiling point of the solute.

Therefore, the greater the amount of salt, the In addition the larger the longer it takes water to boil.

<h3>How does the volume of water affect how long it will take to boil?</h3>

The mass of water increases with increase in volume of water.

Therefore, an increase in volume of water increases the time it takes to boil and vice versa.

<h3>How does the length of a paper airplane affect how far it will fly?</h3>

For a paper airplane the larger its wings, the greater the lift generated.

The greater the lift, the farther the paper airplane will fly.

Therefore, an increase in the length of the paper airplane, the farther it will fly.

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7 0
1 year ago
The force exerted on the tires of a car that directly accelerate it along a road is exerted by the
azamat

The force exerted on the tires of a car that directly accelerate it along a road is exerted by the road friction.

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Force is defined as the product of mass and acceleration of an object.

Friction is defined as the force that resists the movement of an object over another.

Therefore, the force exerted on the tires of a car that directly accelerate it along a road is exerted by the road friction.

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7 0
2 years ago
A ship is towed through a narrow channel by applying forces to three ropes attached to its bow. Determine the magnitude and orie
Y_Kistochka [10]

This question is solved using an available similar problem as data provided for the forces was not given.

Repeat the same steps outlined for your problem.

Regards.

Answer:

F = 1.598 KN , Q = 90 degree (+ y-axis)

Explanation:

Sum of Forces in x-direction to the left (+)

2 cos (30) + 3cos (60) + F*cos (Q) = F_a   ..... 1

Sum of Forces in y-direction to the up (+)

2 sin (30) + F*sin (Q) - 3 sin (60)  ...... 2

Using Eq 2 and solve:

F*sin (Q) = 1.598 KN

F_min when sin (Q) is max, max possible value of sin(Q) = 1 @ Q = 90 degrees.

Hence,

F_min = 1.598 KN

Using Eq 1 @ Q = 90 degrees and F = 1.598 KN:

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3 years ago
One end of the nail is made pointed why​
Sati [7]
Because it helps the nail to enter an object
4 0
4 years ago
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