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3 years ago

10

Head gear is required for many sports and can be the most important piece of safety equipment you can have. Question 2 options:

True False

2 answers:

Crank3 years ago

6 0

Answer:true

Explanation:

bija089 [108]3 years ago

4 0

It’s true because head injuries can be the most harmful, and possible fatal, therefore it is the most important area to protect

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Answer:

Heat energy required (Q) = 3,000 J

Explanation:

Find:

Mass of water (M) = 200 g

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Find:

Heat energy required (Q) = ?

Computation:

Q = M × ΔT × C

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Because weight is a measurement of the amount of gravity pulling on an object, weight is considered a ______. Question 18 option

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2 years ago

A 1.50x103-kilogram car is traveling east at 30 meters per second.

frez [133]

Answer:

$39000\ \text{kg m/s}$

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Explanation:

m = Mass of car = $1.3\times 10^{3}\ \text{kg}$

t = Time = 9 seconds

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v = Final velocity = 0

Impulse is given by

$J=m(v-u)\\\Rightarrow J=1.3\times 10^3(0-30)\\\Rightarrow J=-39000\ \text{kg m/s}$

The magnitude of the total impulse applied to the car to bring it to rest is $39000\ \text{kg m/s}$ .

The direction is towards west as the sign is negative.

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3 years ago