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Orlov [11]
3 years ago
10

A spelunker is surveying a cave. She follows a passage 180 m straight west, then 210 m in a direction 45° east of south, and the

n 280 m at 30° east of north. After a fourth displacement, she finds herself back where she started. Calculate the magnitude and direction of the fourth displacement.
Help me to solve itttttt
Physics
1 answer:
Maksim231197 [3]3 years ago
7 0

got this from assignmentexpert

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a body weights 28N at a height of 3200km from the earth surface.What will be the gravitational force on that body if its lies on
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Answer:

The object would weight 63 N on the Earth surface

Explanation:

We can use the general expression for the gravitational force between two objects to solve this problem, considering that in both cases, the mass of the Earth is the same. Notice as well that we know the gravitational force (weight) of the object at 3200 km from the Earth surface, which is (3200 + 6400 = 9600 km) from the center of the Earth:

F_G=G\,\frac{M_E\,m}{d^2} \\28\,\,N=G\,\frac{M_E\,m}{9600000^2}

Now, if the body is on the surface of the Earth, its weight (w) would be:

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Now we can divide term by term the two equations above, to cancel out common factors and end up with a simple proportion:

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A lamp that uses 100.0 watts of power requires a voltage of 210.0 volts. What is the resistance of the lamp?
alexandr402 [8]
Resistance = Voltage/Current
Wattage = Voltage * Current

<span> <span> </span> </span> That means the current drawn by the lamp is equal to 100 watts divided by 210 volts.

Resistance =\frac{210}{ \frac{100}{210} }


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Explanation:

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