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Dvinal [7]
4 years ago
14

Describe what happens, at a microscopic level, when an object is charged by rubbing. For instance, what happens when a plastic p

ipe is rubbed with a cloth? Describe the specific case where the rod becomes negatively charged
Physics
1 answer:
olga_2 [115]4 years ago
7 0

Answer:

Explanation:

The static charges are generated due to excess or deficiency of electrons, because these are the smallest quanta of charge available at the molecular level which can get transferred with minimal energy requirement.

These charges are usually generated by friction between  the two surfaces leading to the transfer of electron from one to another.

When a plastic pipe is rubbed with a cloth then due to friction the surface of the cloth loses electron which gets stuck at the surface of the pipe making it negatively charged.

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Astronaut Rob leaves Earth in a spaceship at a speed of 0.960c relative to an observer on Earth. Rob's destination is a star sys
xxMikexx [17]

Answer:

A) 15.0 years

Explanation:

Due to the distance to the star system is in light-year units, we can compute the time by using:

t=\frac{d}{v}=\frac{14.4 l-y}{0.960}=15l-y

then, Rob will take to complete the trip about 15 light-years.

hope this helps!!

3 0
3 years ago
Two identical loudspeakers that are 5.00 m apart and face toward each other are driven in phase by the same oscillator at a freq
Lunna [17]

Answer:0.0982 m

Explanation:

Given

distance between two loudspeaker is 5 m

frequency (f )=875 Hz

speed of sound (v)=344 m/s

Let x_0 be the smallest distance moved by observer then

Position of observer w.r.t to first speaker is

x_1=\frac{L}{2}-x_0

Position of observer w.r.t to second speaker is

x_2=\frac{L}{2}+x_0

\Delta x=2x_0

For Destructive interference

\Delta x=\left (  m+\frac{1}{2}\right )\cdot lambda

For minimum m=0

and \lambda =\frac{v}{f}

2x_0=\frac{v}{2f}

x_0=\frac{v}{4f}=\frac{344}{4\times 875}=0.0983 m

8 0
3 years ago
It takes 6 seconds for a stone to fall to the bottom of a mine shaft. how deep is the shaft
Margaret [11]
You need the kinematic equation for distance as a function of acceleration:

d = [v(initial) *t] + 0.5a*t^{2}

where a = gravitational acceleration 9.8m/s^{2}
v(initial) = starting velocity
t = time of fall

if the stone started at rest then v(initial) = 0 making the equation simply 0.5a * t^{2}

Let me know if you still need further help :)
6 0
3 years ago
Why do astronauts float aboard the international space station?
lianna [129]
They’re falling toward earth & moving forward at about the same velocity. because the downward and forward forces are nearly equal, the astronauts are not pulled in any specific direction, so they float . <span>
</span>
8 0
3 years ago
Which type of force can be in the same it opposite direction?
LuckyWell [14K]

Answer:

C) unbalanced

Explanation:

Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the net force is zero.

4 0
3 years ago
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