3 years ago

What are some similarities between electricity and gravity?

Physics

1 answer:

kow [346]3 years ago

5 0

Similarity : inverse square law for strength of force compared with distance.

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A solid nonconducting sphere of radiusRcarries a chargeQdistributed uniformly throughout itsvolume. At a certain distancer1(r1&l

lara [203]

Answer:

$E' = \frac{1}{8} E$

Explanation:

Given data:

first case

Distance of electric field from center of sphere is r_1 <R

Electric field at r_1< R

$E = \frac{kQr_1}{R^3}$

second case

Distance of electric field from centre of sphere is r_1 < 2R

Electric field at r_1< 2R

$E' = \frac{kQr_1}{8R^3}$

so, we have

$E' = \frac{1}{8} E$

3 0

3 years ago

A skier starts from rest at the top of a 40.8 m hill, skis down a 30 degree incline into a valley, and continues up a 32.5 m hig

Volgvan

Answer:

a. 28.27 m/s

b. 12.75 m/s

c. No

Explanation:

The bottom

Ek = Ep

¹/₂ * m * v² = m * g * h₁

v = √ 2 * g * h₁ = √ 2 * 9.8 * 40.8 m

v = 28.27 m/s

At the top

Ek = Ep

¹/₂ * m * v² = m * g * h₁

v = √ 2 * g * h₁ = √ 2 * 9.8 * (40.8 - 32.5) m

v = 12.75 m/s

No in this case the axis is the same of the motion so, the angle doesn't affect the result

3 0

3 years ago

A Cambra pouce car traveling at 28 m/s slow

natka813 [3]

Answer:

t = 7.8 seconds

Explanation:

Given that,

The initial speed of the car, u = 28 m/s

Acceleration of the car, a = 3.6 m/s²

We need to find the time taken for the police car to come to Stop. When it stops, its final speed is equal to 0. So, using the equation of kinematics to find it i.e.

$v=u+at\\\\0=28+3.6t\\\\t=\dfrac{28}{3.6}\\\\t=7.8\ s$

So, the required time is 7.8 seconds.

7 0

3 years ago

Help! xoxo thank you

mrs_skeptik [129]

Like charges repel and opposite charges attract.

7 0

2 years ago

The net forced experienced by a box is 500 N. If the force of friction opposing the motion is 100 N, what is the force exerted b

Alexeev081 [22]

The force exerted by the person is 600 N because to find the original force you would add back 100 from friction

8 0

3 years ago