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Oliga [24]
3 years ago
9

A positive point charge Q is fixed on a very large horizontal frictionless tabletop. A second positive point charge q is release

d from rest near the stationary charge and is free to move. Which statement best describes the motion of q after it is released? a. As it moves farther and farther from Q, its speed will keep increasing.b. As it moves farther and farther from Q, its speed will decrease.c. As it moves farther and farther from Q, its acceleration will keep increasing.d. Its speed will be greatest just after it is released.e. Its acceleration is zero just after it is released.
Physics
1 answer:
UNO [17]3 years ago
6 0

Answer:

As it moves farther and farther away from Q, it's speed will keep increasing.

Explanation:

This is so because the point charges are both positive charges and positive charges repel.

As the charges repel, they do so at an increasing speed.

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The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have?
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Carbon-13 will have 6 protons (because it is carbon), 6 electrons, and 7 neutrons. Isotopes have a different number of neutrons.
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What is the Sl unit for speed
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Answer: meter per second

Explanation: meter per second

Speed has the dimensions of distance divided by time. The SI unit of speed is the meter per second, but the most common unit of speed in everyday usage is the kilometer per hour or, in the US and the UK, miles per hour. For air and marine travel the knot is commonly used.

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3 years ago
Which statements best describe energy ? check all that apply
Ainat [17]

<u>The statements that describes energy best as follows: </u>

  • The total amount of energy in the universe remains constant.
  • Energy can be converted from one form to another.  
  • Energy cannot be created or destroyed.  

<u>Explanation :</u>

The Universe is a closed system of energy from where the thermodynamics first law is quoted i.e. the energy in the closed system remains constant.

The energy in the closed system can neither be created nor destroyed in the absence of external energy supply. However, it keeps on changing from one state to another. These are the absolute statements about the total energy existing in the Universe.  

There are many energy forms existing in the Universe such heat, mass, vibrations etc. that consistently change their form from one to another but the total energy amount is always constant until external energy is applied to the system.

According to the quantum theory, even an electron absorbs or emits energy while jumping from one energy band to the other. There is never a case where energy can create or destroy in a closed system.

6 0
4 years ago
5. A 5.5 x10-6 C charge is located 0.28 m from a -3.5 x 10-6 C charge.
ra1l [238]

(a) The magnitude of force that the positive charge exerts on the negative charge is - 2.209 N.

(b) If the negative charge is doubled, then the force will also get doubled.

The new force will be F = -4.418 N.

Explanation:

The force acting between two charged particles separated by a distance is termed as Coloumb's force or electrostatic force. It can be termed as electrostatic force of attraction if the the force acting between the charges are oppositely charged. And it can be termed as electrostatic force of repulsion if the charges are similar or like charges.

In the present case, there is a positive and negative charge, so electrostatic force of attraction will be acting between them. As per Coloumb's law, the electrostatic force of attraction is directly proportional to the product of charges and inversely proportional to the square of distance of separation.

F = \frac{kQq}{d^{2} }

Here, k is the constant of proportionality which is equal to 9 ×10^{9} and Q, q are the two charges, d is the distance of separation.

So here Q = 5.5 ×10^{-6} C and q = - 3.5 ×10^{-6} C and d = 0.28 m

Then, F=-\frac{9*10^{9}*5.5*10^{-6} * 3.5 * 10^{-6}  }{(0.28)^{2} } = 2209.82*10^{-3}

So the magnitude of force that the positive charge exerts on the negative charge is - 2.209 N.

(b) If the negative charge is doubled, then the force will also get doubled.

The new force will be F = -4.418 N.

3 0
4 years ago
Which of the following activities could lead to injuries?
Ipatiy [6.2K]

Answer:

Fighting

Explanation:

Fighting with someone like punch for punch can make the person bleed which an injury to the guy who you fought with and you can be arrested if the parents file a complain at the police station

6 0
3 years ago
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