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3 years ago

11

What is the difference in average speed between a car that traveled 150 kilometers in 5 hours and another that traveled 130 kilo

meters in the same time? Just write the number.

1 answer:

Morgarella [4.7K]3 years ago

5 0

I think it’s 1,150 but if i’m wrong i’m sorry

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Explain how the magnitude of the gravitational force between the earth and the sun changes as the earth moves from position 'A'

Lina20 [59]

Answer:

Explanation:

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As gravity varies with the inverse of the square of the distance (F = GMm/d²), the force at the closer distance will be greater than the force at the longer distance.

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3 years ago

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kolezko [41]

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4 years ago

A ball took 0.45s to hit the ground 0.72m from the table. What was the horizontal velocity of the ball as it rolled off the tabl

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4 years ago

Nimfa-mama [501]

<h2>C. 20 T</h2>

The strength of the magnetic field is equal to 20 Tesla.

<h3>Explanation:</h3>

Given:

Induced potential difference = V = 12 V

Length of wire = L = 0.20 m

Speed of the moving wire = V = 3.0 m/s

Magnetic field strength = B = ?

A conductor, placed in a uniform magnetic field; when moved at a constant speed with respect to the field, leads to a changing magnetic flux, generating an electromotive force (EMF). Using, Faraday's law of magnetic induction, a moving conductor's induced EMF in terms of the magnetic field strength is given by :

$E = L\times V\times B$ ......................(1)

where

E = Induced potential difference (EMF)

L = Length of the conductor

V = Speed of the conductor moved with respect to the magnetic field

B = Strength of uniform magnetic field

Rewriting equation (1) for B, we get

$B = \frac{E}{L\times V} = \frac{12}{0.2\times 3} = \frac{12}{0.6} = 20\ T$

The strength of magnetic field is equal to 20 Tesla.

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4 years ago

1. A boulder fell from a small cliff and accelerated towards a car below at 9.8 m/s^2. The

natita [175]

Answer:

Mass = 10102.04 kilograms.

Explanation:

Given the following data;

Acceleration = 9.8m/s²

Force = 99000N

To find the mass;

Mass = force/acceleration

Mass = 99000/9.8

Mass = 10102.04 kilograms.

Therefore, the mass of the boulder is 10102.04 kilograms.

3 0

3 years ago