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Vaselesa [24]
3 years ago
7

Would a positive test charge released fromrest move toward a region of higher or lower electric potential(compared to the electr

ic potential at the point where it isreleased)?The answer is lower electric potentialNow imagine that the sign of our testparticle is changed from positive to negative, but the electricpotential remains the same. Which of the following statements iscorrect?
A. Thedirection of the force will change and it will point to regions ofhigher potential energy.B. Thedirection of the force will not change and it will point to regionsof higher potential energy.C. Thedirection of the force will not change and it will point to regionsof lower potential energy.D. Thedirection of the force will change and it will point to regions oflower potential energy.
Physics
1 answer:
Salsk061 [2.6K]3 years ago
5 0

Answer:

D. The direction of the force will change and it will point to regions of lower potential energy.

Explanation:

Direction will change because now you will have the opposite charge. It will still move to the lower potential because of the law of conservation of energy.

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a stone attached to 1m long string is moving with the speed of 5ms in a circle find the centripetal acceleration of the stone​
Dafna1 [17]

Answer:

The centripetal acceleration of the stone is 5 m/s²

Explanation:

The length of the string to which the stone is attached, r = 1 m

The speed with which the string is rotated, v = 5 m/s

The centripetal acceleration, a_c, is given as follows;

a_c = \dfrac{v^2}{r}

Therefore, the centripetal acceleration of the stone found as follows;

a_c = \dfrac{(5 \ m/s)^2}{1 \ m} = 5 \ m/s^2

The centripetal acceleration of the stone, a_c = 5 m/s².

5 0
3 years ago
How much pressure is created when you apply a
Alekssandra [29.7K]
Pressure
= Force/Area

Area = π(d^2)/4
= π(0.4^2)/4
=0.126 m2
Pressure
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5 0
2 years ago
A ball is dropped from an upper floor, some unknown distance above your apartment. As you look out of your window, which is 1.50
laila [671]

Answer:

The ball is dropped at a height of 9.71 m above the top of the window.

Explanation:

<u>Given:</u>

  • Height of the window=1.5 m
  • Time taken by ball to cover the window height=0.15

Now using equation of motion in one dimension we have

s=ut+\dfrac{at^2}{2}

Let u be the velocity of the ball when it reaches the top of the window

then

1.5=0.15u+\dfrac{9.8\times0.15^2}{2}\\u=3.96\ \rm m/s\\

Now u is the final velocity of the ball with respect to the top of the building

so let t be the time taken for it to reach the top of the window with this velocity

3.96=gt\\t=0.4\ \rm s\\

Let h be the height above the top of the window

h=\dfrac{gt^2}{2}\\\\h=\dfrac{9.8\times 0.4^2}{2}\\h=9.71\ \rm m

3 0
3 years ago
Can anybody helppp me with this
KonstantinChe [14]

Answer:

Salt dissolving

Explanation:

Dis solving salt in water doesn't change it's chemical composition

4 0
3 years ago
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Which wave property changes when two waves interfere in the same medium?
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<span>When two waves of same frequency travel in a medium simultaneously in the same direction then, due to their superposition, the resultant intensity at any point of the medium is different from the sum of intensities of the two waves. At certain points the intensity of the resultant wave has a large value while at some points it has a very small or zero. This is called wave interference.</span>
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3 years ago
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