3 years ago

A person walks 40. m east, then 20. m west. He then

Physics

1 answer:

Angelina_Jolie [31]3 years ago

3 0

Answer:

Explanation:

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A convex mirror with a focal length 20 cm creates a virtual image 10cm away from the mirror. What is the position of the object?

nikdorinn [45]

Answer:

$20$ cm

Explanation:

$d_{o}$ = distance of the object = ?

$f$ = focal length of the convex mirror = - 20 cm

$d_{i}$ = distance of the image = - 10 cm

Using the lens equation

$\frac{1}{d_{o}} + \frac{1}{d_{i}} = \frac{1}{f}$

$\frac{1}{d_{o}} + \frac{- 1}{10} = \frac{- 1}{20}$

$d_{o} = 20$ cm

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What is the voltage drop across the 30 ohm resistor?

Jlenok [28]

B - the voltage drop is 60 V

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3 years ago

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stiks02 [169]

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Explanation:

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3 years ago

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What is the power of a machine that transfers 15,000J of energy in 1 minute?

____ [38]

Answer:

answer is 250 W

Explanation:

W=P * t

t=60s

W= 15000J

15000= P * 60

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P= 250W. (SI unit of power Watt)

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3 years ago

Which describes the molecular motion of a solid nickel marble rolled across the floor?

Gemiola [76]

I can't decide between A and B, but B seems more likely to me. Even though the molecules don't look like they're moving, the area of contact is slightly more compressed.

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4 years ago