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2 years ago

11

Which of the following would double the amount of current flowing through a piece of metal wire?

1 answer:

adelina 88 [10]2 years ago

7 0

Considering the answers.
1. Halve the voltage across it
2. Quarter the voltage across it
3. Double the voltage across it
4. Quadruple the voltage across

The appropriate answer would be 3. Double the voltage. According to ohms law the current through a conductor between two points is directly proportional to the voltage across the two points at a constant resistance. Therefore a increase in voltage causes a corresponding increase in the current.

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The gravitational force between two spheres in outer space is 1000 n. how large would this force be if the mass of each sphere w

kipiarov [429]

The force will remain same if the mass of each sphere is doubled and the distance between them is doubled as well.

The force of gravitation between two spheres is given by

$f=\frac{G m1 m2}{r^{2}}$

m1= mass of first object

m2= mass of second object

r= distance between the masses

Now if each mass is doubled and the distance r is doubled as well

$F'= \frac{G (2m1)(2m2)}{(2r)^{2}}$

$F'= \frac{4 G m1 m2}{4r^{2}}$

F'= $\frac{G m1 m2 }{r^{2}}$

so F'= F

so the force remains same and is equal to 1000 N.

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2 years ago

How long will it take for a radioactive isotope with a decay constant of 0.15 (which means a half life of 4.6 days ) to decay to

jek_recluse [69]

Radioactive decay is given by:
N = No x e^(-λt)
We know that N/No has to be 0.05
λ = 0.15
0.05 = e^(-0.15t)
t = ln(0.05)/(-0.15)
t = 19.97 days

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3 years ago

Which is a unit to measure air pressure?

nata0808 [166]

Answer:

c) cubic centimetre is it's answer..

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2 years ago

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If it takes Ashley 3 seconds to run from the batters box to first base at an average speed of 6.5 meters per second, what is the

Sidana [21]

19.5 meters because 6.5*3 is 19.5

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Consider a skateboarder who starts from rest at the top of ramp that is inclined at an angle of 18.0 ∘ to the horizontal.

kotegsom [21]

Answer:

Explanation:

v= u + at

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2 years ago