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ANTONII [103]
3 years ago
6

Two small identical balls A and B are held a distance r apart on a frictionless surface, with i very large compared with the siz

e of the balls. Ball A has a net charge of2q; ball B has a net charge of q. The balls are released at the same instant and begin to move together. Which characteristics describe the magnitudes of their accelerations over time? point Oequal and increasing Ounequal and increasing Oequal and decreasing Oequal and constant
Physics
1 answer:
iren2701 [21]3 years ago
4 0

According to the statement both bodies will experience the same force, by the effect of action and reaction, which would be the same to apply Newton's third law. By the characteristics presented both will have the same mass and the same acceleration. However, considering the sign of their charges, these being the same, they will be repelled from each other. When this movement is generated, the force will begin to decrease as the distance increases and therefore its acceleration will also decrease

Hence the correct option is equal and decreasing.

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Particles 1 and 2 each mass m fixed to the ends of a rigid massless rod of length L1 + l2 with L1 = 20cm and l2 = 80 cm. The rod
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Answer:

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3 years ago
A refrigerator is being pulled up a ramp with a horizontal force P, which acts at the top corner. The refrigerator has a mass of
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Answer:

(a) P = 459.055 N.

(b) the refrigerator tips.

Explanation:

Given, the angle of ramp is 20°.

When the weight of refrigerator is resolved in directions parallel and perpendicular to ramp, 75×g×sin(20°) and 75×g×cos(20°).

⇒ normal contact force is 75×g×cos(20°).

⇒ frictional force is 0.3×75×g×cos(20°) = 207.414 N

so, total opposite force is 207.414 + 75×g×sin(20°) = 459.055 N.

so, the force needed is P = 459.055 N

And as the moment due to both opposite force and P force are in same direction the refrigerator tips rather than just sliding.

4 0
3 years ago
The distance from the Earth to the Sun equals 1 AU. Neptune is 30 AU from the Sun. How far is Neptune from the Earth?AU
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Answer:

Depending on the relative position of the Earth the Sun and Neptune in the Earths orbit the distances are;

The closest (minimum) distance of Neptune from the Earth is 29 AU

The farthest (maximum) distance of Neptune fro the Earth is 31 AU

Explanation:

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The distance from the Earth to the Sun = 1 AU

The distance of Neptune from the Earth = 30 AU

We have;

When the Sun is between the Earth and Neptune, the distance is found by the relation;

Distance from the Earth to Neptune = 30 + 1 = 31 AU

When the Earth is between the Sun  and Neptune, the distance is found by the relation;

Distance from the Earth to Neptune = 30 - 1 = 29 AU

Therefore, the closest distance from Neptune to the Earth in the Earth's Orbit is 29 AU

The farthest distance from Neptune to the Earth in the Earth's orbit is 31 AU.

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An incident ray that passes through the vertex of a convex lens:
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The answer is refracts parallel to the axis of the lens
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Isotopes of an element differ in their number of ?
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neutrons

Explanation:

Isotopes of an element differ in their number of neutrons.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the  number of neutrons in their nucleus.

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Isotope brainly.com/question/2593342

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