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Trava [24]
3 years ago
13

40 POINTS

Physics
2 answers:
prohojiy [21]3 years ago
7 0

Answer:

C

Explanation:

this is because i need more space

Alenkinab [10]3 years ago
6 0

Answer:

C

Explanation:

If you flick it quickly, the coin stays in one place and then drops into the cup. An object at rest will remain at rest.

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In a parallel circuit, what’s happens to the current through each resistor when the voltage is doubled?
34kurt

Answer:

A

Explanation:

Voltage, V = Current, I x Resistance, R  (V is directly proportional to I where R is constant of proportionality)

This means that when Voltage is increased, Current increases and when voltage is decreased, current decreases (and the inverse is true). Through all this though, resistance remains constant regardless.

6 0
3 years ago
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An electron (charge −e=−1.60×10−19C−e=−1.60×10−19C) is at rest at a distance 1.00×10−10 m 1.00×10−10m from the center of a nucle
shtirl [24]

Answer:

-9.45\times10^{-16} \text{ J}

Explanation:

According to Coulomb's law, the force of attraction between two point charges, q_1 and q_2, separated by a distance d is given by

F = k\dfrac{q_1q_2}{d^2}

k is a constant with a value of 9\times10^9\text{ F/m}.

When we substitute the values from the question,

F = (9\times10^9\text{ F/m})\dfrac{(-1.60\times10^{-19} \text{ C})\times(+1.31\times10^{-17}\text{ C})}{(1.00\times10^{-10}\text{ m})^2} = -1.89\times10^{-6} \text{ N}

This value is negative because it is in a direction towards the positive charge.

The work done in moving the electron from the nucleus is

W = F\times r

W = (-1.89\times 10^{-6} \text{ N})\times(5.00\times10^{-10}\text{ m}) = -9.45\times10^{-16} \text{ J}

This is negative because work is done on the electron, not by it.

3 0
3 years ago
A uniform solid cylindrical log begins rolling without slipping down a ramp that rises 28.0° above the horizontal. After it has
Novay_Z [31]

Answer:

3.07 m/s

Explanation:

6 0
3 years ago
A car is traveling at a speed of 50 m/sec when it suddenly accelerates at a rate of 5 m/sec2. How fast will the car be going (fi
NISA [10]

Answer:

200 ms-1

Explanation:

v = u+ at

v = 50+ 5×30

v = 200 ms-1

5 0
3 years ago
What would happen if the earth stopped spinning on its axis?
Alex777 [14]

Answer: the atmosphere would still be in motion with the Earth's original 1100 mile per hour rotation speed at the equator.

Explanation:

8 0
3 years ago
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