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Ksju [112]
3 years ago
13

Two protons are released from rest when they are 0.750 {\rm nm} apart.

Physics
1 answer:
Alex787 [66]3 years ago
4 0

Explanation:

Given:

m = 1.673 × 10^-27 kg

Q = q = 1.602 × 10^-19 C

r = 0.75 nm

= 0.75 × 10^-9 m

A.

Energy, U = (kQq)/r

Ut = 1/2 mv^2 + 1/2 mv^2

1.673 × 10^-27 × v^2 = (8.99 × 10^9 × (1.602 × 10^-19)^2)/0.75 × 10^-9

v = 1.356 × 10^4 m/s

B.

F = (kQq)/r^2

F = m × a

1.673 × 10^-27 × a = ((8.99 × 10^9 × (1.602 × 10-19)^2)/(0.075 × 10^-9)^2

a = 2.45 × 10^17 m/s^2.

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The chart lists the masses and velocities of four objects.

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Two parallel wires are separated by 5.60 cm, each carrying 2.65 A of current in the same direction. (a) What is the magnitude of
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Explanation:

It is given that,

The separation between two parallel wires, r = 5.6 cm = 0.056 m

Current in both the wires is 2.65 A

(a) We need to find the magnitude of the force per unit length between the wires. It can be given by :

\dfrac{F}{l}=\dfrac{\mu_o I_1I_2}{2\pi r}\\\\\dfrac{F}{l}=\dfrac{4\pi \times 10^{-7}\times 2.65\times 2.65}{2\pi \times 0.056}\\\\\dfrac{F}{l}=2.5\times 10^{-5}\ N/m

(b) As the current is in same direction, the wires will attract each other.

5 0
3 years ago
A badger is trying to cross the street. Its velocity vvv as a function of time ttt is given in the graph below where rightwards
hjlf

The badgers displacement from its position at point <em>t </em>= 2, to its position at point <em>t </em>= 3 is 25 meters

<h3>Which method can be used to calculate the displacement of the badger?</h3>

The points on the graph are;

(0, 0), (1, 5), (3, -5), (6, -5)

The point <em>t </em>= 2 is between (1, 5) and (3, -5)

The slope, <em>m</em>, of the line containing the point <em>t </em>= 2 is therefore;

  • m = (-5 - 5)/(3 - 1) = -5

The equation of the line is therefore;

v - 5 = -5•(t - 1)

v = -5•t + 5 + 5 = -5•t + 10

v = -5•t + 10

At <em>t </em>= 2, we have;

v = -5×2 + 10 = 0

The velocity at <em>t </em>= 2 is 0 m/s

The value of the acceleration is the same as the slope, <em>m </em>= a = -5

Given that the initial velocity at <em>t </em>= 2 is 0, we have;

∆x = u•t + 0.5•a•t²

At <em>t </em>= 3, the time of travel from the time <em>t </em>= 2 is 1 seconds, which gives;

∆x = 0×5 + 0.5×(-5)×1² = -2.5

The distance traveled between points,<em> </em><em>t </em>= 2 and <em>t </em>= 3 is ∆x = -2.5, which is 2.5 meters in the direction opposite to the initial direction.

Learn more about the equations of motion here:

brainly.com/question/21010554

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5 0
2 years ago
If mass 1 is 2.0 m to the right of the fulcrum and weighs 4.0 kg, and mass 2 weighs 6.0 kg, what distance will mass 2 need to be
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Explanation:

C 1.33 m to the left

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