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mash [69]
3 years ago
14

QUESTION 9 / 10

Physics
2 answers:
enyata [817]3 years ago
5 0

AWNSER:

awnser:

C

explanation:

schepotkina [342]3 years ago
4 0

Answer:

A

Explanation:

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Doug is doing work. Without knowing exactly what he is doing, which can be said about the work he is doing?
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<h3>Answer;</h3>

<em>Energy is transferred.</em>

<h3>Explanation;</h3>
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  • Work is measured in Joules.
  • Energy on the other hand, is the ability to do work.
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Opportunity cost refers to what you have to give up to buy what you want in terms of other goods or services. When economists use the word “cost,” we usually mean opportunity cost.
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3 years ago
Researchers have estimated that what to what genes reside within the chromosomes and influence all genetic characteristics
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Researchers have estimated that ______ to ______ genes reside within the chromosomes and
influence all genetic characteristics.

a. 10,000; 15,000
b. 20,000; 25,000
c. 50,000; 70,000
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6 0
3 years ago
A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the window is 7.5 m off the ground. T
slamgirl [31]

Answer:

u=14.48m/s

Explanation:

From the question we are told that:

Height of window h=2m

Height of window off the ground h_g=7.5m

Time to fall and drop t=1.3s

 

Generally the Newton's equation motion  is mathematically given by

 s=ut+\frac{1}{2}at^2

Where

h=ut+\frac{1}{2}at^2

2=u1.3-\frac{1}{2}*9.8*1.3^2

2=u1.3-8.281

u=7.91m/s^2  

Generally the Newton's equation motion  is mathematically given by

2as=v^2-u^2

Where

-2gh_g=v^2-u^2

-2*9.8*7.5=(7.91)^2-u^2

-147=62.5681-u^2

u=\sqrt{209.5681}

u=14.48m/s

Therefore the  ball’s initial speed

u=14.48m/s

8 0
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