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Anna71 [15]
2 years ago
7

Best exercises for these topics. (have the amount of exercises, have 4 exercises for each.)

Physics
2 answers:
Kipish [7]2 years ago
5 0

Answer:

what is the question?

Explanation:

i dont understand

yaroslaw [1]2 years ago
5 0

Answer:

follow this routine .

Explanation:

because it can build up your body fast and effectively so

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Example 2.1
tatiyna

Answer:

5 min 20 km --------

Explanation:

5 min 20 km --------

8 0
2 years ago
Global warming is threatening polar bear habitats and the bears' way of life. If trends continue, predict what will become of th
velikii [3]
It will become a stink. It will become extinct because if people keep doing what you’re doing it will get no better.
4 0
3 years ago
Calculate the amount of heat liberated (in kj) from 411 g of mercury when it cools from 88.0°c to 12.0°c.
Katen [24]
You should note that the melting point of mercury is -38.83°C, while the boiling point is at 356.7°C. Then, that means that there is no latent heat involved here. We only compute for the sensible heat.

ΔH = mCpΔT
The Cp of mercury is 0.14 J/g·°C
Thus,
ΔH = (411 g)(0.14 J/g·°C)(88 - 12°C)
<em>ΔH = 4,373.04 J</em>
5 0
3 years ago
A baseball has mass 0.147 kg. If the velocity of a pitched ball has a magnitude of 44.5 m/s and the batted ball's velocity is 55
Anit [1.1K]

Explanation:

We have,

Mass of a baseball is 0.147 kg

Initial velocity of the baseball is 44.5 m/s

The ball is moved in the opposite direction with a velocity of 55.5 m/s

It is required to find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.

Change in momentum,

\Delta p=mv-mu\\\\\Delta p=m(v-u)\\\\\Delta p=0.147\times ((-55.5)-44.5)\\\\\Delta p=-14.7\ kg-m/s\\\\|\Delta p|=14.7\ kg-m/s

Impulse = 14.7 kg-m/s

Therefore, the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat is 14.7 kg-m/s

4 0
3 years ago
If you begin with 40 grams of a radioactive isotope and end with 10 grams, how many half-lifes of the radioactive isotope have p
Rom4ik [11]
30 grams of radioactive isotope have passed.
8 0
3 years ago
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