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Ghella [55]
3 years ago
13

An overhead projector lens is

Physics
1 answer:
Inessa [10]3 years ago
6 0

Answer: 34.9 cm

Explanation:

You are given the following parameters;

Object distance U = 32 cm

Magnification M = - 12.0

According to formula for magnification;

M = V/U

Where V = image distance.

Substitute V and M into the formula

-12 = V/32

Cross multiply

V = -12 × 32

V = - 384

You can use the formula

1/f = 1/V + 1/U

Where f = focal length

Substitute V and U into the formula

1/f = - 1/384 + 1/32

Find the lowest common factor of the denominator at Left hand side

1/f = ( -1 + 12 ) / 384

1/f = 11/384

Reciprocate both sides

F = 384/11

F = 34.9 cm

He should therefore use the focal length of 34.9 cm

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A skateboarder starts up a 1.0-m-high, 30° ramp at a speed of 7.6 m/s . The skateboard wheels roll without friction. At the top,
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Answer:

t = 1.084 s

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Explanation:

given,

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v_y =8.79\times sin 30^0

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t = 1.084 s

then horizontal distance

s =v_x \times t

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2 years ago
A book rests on a wooden table is an example of
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Answer:

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btw, congratulations for turning into an expert.

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