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ahrayia [7]
3 years ago
11

Which of the device has the highest resistance?

Physics
2 answers:
-BARSIC- [3]3 years ago
5 0
It would be c) Rheostat
Margarita [4]3 years ago
5 0
I think it would be c
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The mass of a certain neutron star is 2.5x10^30kg and the radius 7000m. what is the force of gravity on a 1kg object of the surf
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Answer:

3.42N

Explanation:

*not too sure bc i left my physics notes at school so it might not be 100% accurate :p*

Use the equation: F = (GMm)/(r^2)

F = force of gravity

G = gravitational constant (6.7x10^-11)

M = mass1 (2.5x10^30kg)

m = mass2 (1kg)

r = radius (7000m)

Plug it in: F = ((6.7x10^-11)(2.5x10^30)(1)) / (7000^2)

F = (1.675x10^20) / (4.9x10^7)

F = 3.4183673x10^12

F = 3.42N

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3 years ago
If a string completes 500 vibrations in one second, what is its frequency?
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Answer:

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Explanation:

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From the word compound, the compound machine is already a combination of two or more types of simple machine. Thus, the answer is letter C. Because of its complexity, it is able to perform several other functions than a simple one. 
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