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PSYCHO15rus [73]

3 years ago

15

Calculate the electrical energy expended in a device across which the circuit voltage drops by 50 volts in moving a charge of 6

coulombs.

2 answers:

solmaris [256]3 years ago

5 0

1 volt = 1 joule per coulomb 50 volts = 50 joules per coulomb 50 joules/coulomb times 6 coulombs = 300 joules

olasank [31]3 years ago

4 0

$I=\dfrac{Q}{t} \\ \\ \\ W=VIt=V\dfrac{Q}{t}t=VQ=50\times 6=300$

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The radius of Earth is about 6450 km. A 7070 N spacecraft travels away from Earth. What is the weight of the spacecraft at a hei

Triss [41]

Answer:

(a) 1767.43 N

(b) 182.45 N

Explanation:

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mass of person, m = W / g = 7070 / 9.8 = 721.4 kg

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$g' = g\left ( \frac{R}{R+h} \right )^2$

$g' = g\left ( \frac{6450}{6450+6450} \right )^2$

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The weight of the person at such height is

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(b) h = 33700 km

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$g' = g\left ( \frac{R}{R+h} \right )^2$

$g' = g\left ( \frac{6450}{6450+33700} \right )^2$

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Zarrin [17]

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Nutka1998 [239]

Answer:

16.63min

Explanation:

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To find the period you can use one of the Kepler's law:

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By replacing you obtain:

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8 0

3 years ago