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2 years ago

Galileo _____.

Physics

2 answers:

Reptile [31]2 years ago

6 0

Answer: C believed that friction kept objects in motion

Explanation: Galileo wold say that due to inertia, the ball would keep moving forever, if it were not slowed to a stop by friction.

Hope it helps!

AnnZ [28]2 years ago

5 0

Answer:

friction help to slow motion in other word it oppose motion, but in a frictionless environment object would move with difficult stopping point.

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1. Aunt Minnie gives you $10 per second for 4 seconds. How much money do you have after 4 se

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3 years ago

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A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 3.84 m/s

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Answer:

the train is moving at the speed of v = 1.79 m/s

Explanation:

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2 years ago

Which statement explains why a red rose does not appear to be orange?

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2 years ago

A 35-mm single lens reflex (SLR) digital camera is using a lens of focal length 35.0 mm to photograph a person who is 1.80 m tal

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Answer:

a) 35.44 mm

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u = Object distance = 3.6 m

v = Image distance

f = Focal length = 35 mm

$h_u$ = Object height = 1.8 m

a) Lens Equation

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}-\frac{1}{u}=\frac{1}{v}\\\Rightarrow \frac{1}{v}=\frac{1}{35}-\frac{1}{3600}\\\Rightarrow \frac{1}{v}=\frac{713}{25200} \\\Rightarrow v=\frac{25200}{713}=35.34\ mm$

The CCD sensor is 35.34 mm from the lens

b) Magnification

$m=-\frac{v}{u}\\\Rightarrow m=-\frac{35.34}{3600}$

$m=\frac{h_v}{h_u}\\\Rightarrow -\frac{35.34}{3600}=\frac{h_v}{1800}\\\Rightarrow h_v=-\frac{35.34}{3600}\times 1800=-17.67\ mm$

The person appears 17.67 mm tall on the sensor

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2 years ago