At what distance of separation, r, must two 3.20 x 10-9 Coulomb charges be positioned in order for the repulsive force between them to be 83.4 N?

Answers

Answer 1

Answer: F = q₁*q₂* C / r²

F =83.4
q₁ = q₂ = 3.2 * 10⁻⁹
C couloumb constant 8.9 * 10⁹

solve for r

Answer 2

Answer: I'm not 100% sure but I think the answer is 60.4, because you multiply 3.20 by 10, to get 32 - 9 = 23, then subtract 23 from 83.4. Hope this helps you, and good luck!!!

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Who was the powerful and ruthless leader of the soviet union from 1929-1953 who also ordered the great purge in which he had his real and imagined enemies arrested?

Answers

Answer:

The correct answer is Joseph Stalin.

Explanation:

Joseph Vissarionovich Stalin was a Soviet politician who led the soviet union from 1929 - 1953. Stalin self declared himself as the dictator by 1930s. He was the person behind the Great Purge or "Great Terror" in which around a million were imprisoned and some 750,000 were executed. This campaign was led just to execute all those who were a threat to his party.

A ball is thrown straight up. At the top of its path its acceleration isa. 0 m/s2.
b. about 5 m/s2.
c. about 10 m/s2.
d. about 20 m/s2. E. about 50 m/s2.

Answers

We have that From the Question a ball is thrown straight up. At the top of its path its acceleration is

0 m/s2.

Option A

From the question we are told

A ball is thrown straight up. At the top of its path its acceleration is

a. 0 m/s2.

b. about 5 m/s2.

c. about 10 m/s2.

d. about 20 m/s2.

E. about 50 m/s2.

Generally

For a Ball thrown straight up at the top of its path where The gravitational force equals the force of the thrown,the Point where the ball is at equilibrium the Velocity of the ball is zero

Therefore

From the Question

A ball is thrown straight up. At the top of its path its acceleration is

a. 0 m/s2.

Option A

For more information on this visit

brainly.com/question/21811998

C. Acceleration is the rate of change of velocity. So at the top of the path, while the velocity is zero, the CONSTANT GRAVITATIONAL ACCELERATION is about 10 m/s^2 (9.8)

Which wavelength region is most useful for investigating dense cores inside giant molecular clouds?

Answers

Infrared wavelengths

A scientist noticed that a dark-colored peppered moth is more visible on a light-colored background than a light-colored peppered moth. He wonders, “Does this difference in visibility affect the survival rate of dark moths?” Which part of the scientific method does he need to carry out next?

Answers

Answer: Form a hypothesis

A scientific way to investigate a problem involves mainly five steps.

→A question or problem must be formulated in the first step.

→After gathering the background information, A hypothesis must be made.

→Third step would be to design an experiment.

→Fourth step would include collection and recording of data.

→Fifth step would include the conclusions drawn from the experiment and communication of hypothesis and its results.

When the scientist notices that a dark colored peppered moth over light colored background, he formulates a question: whether the difference in visibility affects the survival rate of dark moths or not? Therefore, next step in the scientific method would be to gather more information on the subject and formulate a hypothesis.

Answer:

the correct simple answer is B

Explanation:

Using this equation: LaTeX: v\:=\frac{\Delta x}{\Delta t}v = Δ x Δ t, solve for LaTeX: \Delta tΔ t Group of answer choices LaTeX: \Delta t\:=\frac{v}{\Delta x} Δ t = v Δ x Δ t = v Δ x LaTeX: \Delta t\:=\Delta x\:.\:v Δ t = Δ x . V Δ t = Δ x . V LaTeX: \Delta t\:=\frac{\Delta x}{v} Δ t = Δ x v LaTeX: \Delta t\:=\Delta x-v

Answers

Answer:

$\Delta t = (\Delta x)/(v) \n\n$

Explanation:

Given the expression $v\:=(\Delta x)/(\Delta t)$ , we are to find the value of Δt from the expression. To find Δt, we will make Δt the subject of the formula from the given expression as shown;

$v\:=(\Delta x)/(\Delta t)\n\ncross\ multiply\n\nv*\Delta t = \Delta x\n\nDivide \ both\ sides \ of\ the \ resulting \ equation \ by \ v\n\n(v*\Delta t)/(v) = (\Delta x)/(v) \n\n\Delta t = (\Delta x)/(v) \n\n$

Hence the equivalent expression for $\Delta t = (\Delta x)/(v) \n\n$ .

What is the mass of a falling rock if it produces a force of 147 n?
F=
M=
A=

Answers

F=147N;

Acceleration=9.8m/s2;

Mass=15kg

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