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Igoryamba
3 years ago
14

Which of the following statements about rest and physical activity is NOT true?

Physics
1 answer:
Marta_Voda [28]3 years ago
8 0

Answer: Option (a) is the correct answer.

Explanation:

Physical activity is an activity in which work is done by our body. When we take rest, then our body feels refreshed and as a result, the efficiency to do more work is achieved by our body.

Hence, it is required to take some rest while training or workouts etc to regain the strength and avoid any kind of injury.

Whereas when we take little rest then our body feels exhausted. As a result, we should take adequate rest in order to work properly.

Thus, we can conclude that the statement you should rest as little as possible because it interferes with training is NOT true about rest and physical activity.

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Two water jets are emerging from a vessel at a height of 50 centimeters and 100 centimeters. If their horizontal velocities at t
givi [52]
For t1:

t1 = square root of 2h1 / g = square root of 2 * 0.5 / 9.8 = 0.319 sec

For t2:

t2 = sqaure root of 2h2 / g = square root of 2 * 1.0 / 9.8 = 0.451 sec

Wherein:
t = time(s) for the vertical movement
h= height
g = gravity (using the standard 9.8 m/sec measurement)

d1 = 1*0.319 = 0.319 m
d2 = 0.5 * 0.451 = 0.225 m

Where:

d = hor. distance

ratio = d1:d2
= 0.319 : 0.225
=3.19 : 2.25

The answer is 3.19 : 2.25
8 0
3 years ago
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Which of the following values represents an index of refraction of an actual material?
Airida [17]

The answer is <em>B. 5/4</em> or <em>1.25</em>

3 0
3 years ago
How many grams of ice at 0°c will melt if 1.50 kj of heat are added? (the molar heat of fusion of water is 6.01 kj/mol.) 4.49 g
Nata [24]
The computation would be:moles = mass/ Molar Mass, but we are looking for the mass, so rearranging, will give us: mass = moles x MM 
Q = moles x Hf 
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7 0
3 years ago
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According to Newton's first law of motion, what is required to make an object slow down? Enter your answer in the space provided
LenaWriter [7]

<u>Answer:</u>

According to newton's first law of motion, friction is required to make an object slow down.

<u>Explanation:</u>

According to the Newton's first law of motion, for an object to change its velocity (either a change in the magnitude or the direction), there must be a cause to it which is defined as a net external force.

For example, an object which is sliding across a table or floor slows down due to the net force of friction that is acting on that object.

5 0
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How do units of work and power compare
timurjin [86]

Answer:

Jule

Explanation:

They each have the same units which is jule

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