3 years ago

Thanks+BRAINLIST

Physics

1 answer:

Fynjy0 [20]3 years ago

3 0

Answer:

it change speed

Explanation:

its because when light passes through one medium to another (rarer to denser)its velocity change and its speed also changes

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4. The blades on a fan have a frequency of 15 Hz.

vichka [17]

Answer:

a) 4500 cycles b) 0.0667s c) 6.67s

Explanation:

a) 15 Hz= 15 cycles/ s

5 mins= 300s

15 cycles/s * 300s= 4500 cycles

b) Period= 1/ frequency

Period= 1/ 15 cycles/s

Period= 0.0667s

c) Period * number of revolutions= time

0.0667 * 100= 6.67s

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3 years ago

What services do plants provide? Select the three that apply.

Irina18 [472]

The answer to this is B, C, and D. hope this helped

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3 years ago

Which of the following is the name for matter made up of only one type of atom?

kolbaska11 [484]

Answer: <u>Element </u>

Explanation:

A chemical element is a substance which contain only one type of atom and it may be in the form solid, liquid and gas. On more the smallest particle of element is the atom.

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3 years ago

Read 2 more answers

Help please I’ll mark as brainliest

kirza4 [7]

Answer:

yes

Explanation:

6 0

3 years ago

PLEASE HELP

Gennadij [26K]

Answer:

3.675 m

Explanation:

$a_{x} =0$ $v_{xo}=100$ $a_{y} =-g$ $v_{yo}=0$

X-direction | Y-direction

$R=x_{o}+ v_{xo} t$ | $y=y_{o}+v_{yo}t+\frac{1}{2}a_{y}t^2$

$75=100t$ | $y=0+0+\frac{1}{2} (9.8)(0.75)$

$\frac{75}{100} =t$ | $y=3.675 m$

$0.75s=t$

Hope it helps

3 0

3 years ago