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Arte-miy333 [17]
3 years ago
10

What is the gravitational potential energy of a two-particle system with masses 4.5 kg and 6.3 kg, if they are separated by 1.7

m? If you triple the separation between the particles, how much work is done (b) by the gravitational force between the particles and (c) by you?
Physics
1 answer:
zepelin [54]3 years ago
7 0

Answer:

7.41 x 10^-10 J

Explanation:

m = 4.5 kg

M = 6.3 kg

d = 1.7 m

The formula for the gravitational potential energy is given by

U = \frac{-GMm}{d}

Where, G is the Universal gravitational constant

G = 6.67 x 10^-11 Nm^2/kg^2

U = \frac{-6.67 \times 10^{-11}\times 6.3 \times 4.5}{1.7}

U = - 1.112 x 10^-9 J

Now the separation is tripled, d' = 3 x d = 3 x 1.7 m = 5.1 m

Let the potential energy is U'

The formula for the gravitational potential energy is given by

U' = \frac{-GMm}{d'}

Where, G is the Universal gravitational constant

G = 6.67 x 10^-11 Nm^2/kg^2

U' = \frac{-6.67 \times 10^{-11}\times 6.3 \times 4.5}{5.1}

U' = - 3.71 x 10^-10 J

the work done is equal to the change in potential energy

W = U' - U

W = - 3.71 x 10^-10 + 1.112 x 10^-9

W = 7.41 x 10^-10 J

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5ftx\frac{0.305m}{1ft}  = 1.525mx\frac{100cm}{1m} =152.5cm

then we convert the remaining 2in into cm and add it up:
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152.5cm + 5.08cm = 157.58cm or 157.6cm

Another way to do this is to convert the ft to in and add it up to the remaining 2 in then convert to cm. The answer would be more or less the same. 

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65 \frac{mi}{hr}x\frac{1.61km}{1mi} = 104.7\frac{km}{hr}

5. Now for the next one it is very straightforward because 1V = 1V no matter where you go. So if the given is 220V then that means that the converted value is also 220V. 

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The given is  70°F

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The second table is very easy, all you need to do is convert the values to scientific notation or the other way around. All you need to do is move the decimal till you have a coefficient that is between 1 to 10 and then count how many times you moved the decimal. That will be the number or the exponent of 10. 

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If you moved the decimal to the left, the exponent will be positive. 

Now the other way around. To convert scientific notation to standard form, just move the decimal the number of places indicated by the exponent of 10. If it is positive, you will move to the right and if it is negative, you will move to the left. 

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4 0
3 years ago
You are working on a laboratory device that includes a small sphere with a large electric charge Q. Because of this charged sphe
madam [21]

Answer:

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Explanation:

We can answer this exercise using Gauss's law

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3 years ago
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