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Alexus [3.1K]
3 years ago
11

What is respiration?

Physics
1 answer:
Neporo4naja [7]3 years ago
3 0
The most accurate answer is C. B could be true, but it's not just breathing in
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Calculate the centripetal force (in N) on the end of a 57 m (radius) wind turbine blade that is rotating at 0.3 rev/s. Assume th
enot [183]

Answer:

Check image.

Explanation:

This is what my solution is, not a professional tutor so take my answer with a grain of salt and check.

5 0
3 years ago
A 2 kg rock is at the edge of a cliff 20 meters above a lake The rock becomes loose and falls toward the water below. Calculate
natima [27]

Answer:

The potential energy (P.E) at the top is 392 J

The kinetic energy (K.E) at the top is 0 J

The potential energy (P.E) at the halfway point is 196 J.

The kinetic energy (K.E) at the halfway point is 196 J.

Explanation:

Given;

mass of the rock, m = 2 kg

height of the cliff, h = 20 m

speed of the rock at the halfway point, v = 14 m/s

The potential energy (P.E) and kinetic energy (K.E) when its at the top;

P.E = mgh

P.E = (2)(9.8)(20)

P.E= 392 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the top of the cliff = 0

K.E = ¹/₂(2)(0)²

K.E = 0

The potential energy (P.E) and kinetic energy (K.E) at the halfway point;

P.E = mg(¹/₂h)

P.E = (2)(9.8)(¹/₂ x 20)

P.E = 196 J

K.E = ¹/₂mv²

where;

v is velocity of the rock at the halfway point = 14 m/s

K.E = ¹/₂(2)(14)²

K.E = 196 J.

4 0
2 years ago
A wheel rotates clockwise 6 times per second. What will be its angular displacement after 7 seconds? Answer should be rounded to
solong [7]

Answer:

The frequency of the wheel is the number of revolutions per second:

f= \frac{N_{rev}}{t}= \frac{10}{1 s}=10 Hz  

And now we can calculate the angular speed, which is given by:

\omega = 2 \pi f=2 \pi (10 Hz)=62.8 rad/s in the clockwise direction.

Explanation:

5 0
3 years ago
Read 2 more answers
Please help help help help help<br><br>I will give brainlist and I will follow you​
Feliz [49]

Answer:

1st One (The tendency of objects to keep doing what they are doing)

Explanation:

Inertia is simply the tendency of an object to keep on doing whatever it is doing. It is the natural tendency of an object to stubbornly maintain its state of motion.

Hope This Helps! (=

7 0
2 years ago
This typically occurs on the sun?<br> fusion<br> fission<br> very few chain reactions<br> half life
melisa1 [442]

Answer:

Fusion

Explanation:

The thermonuclear fusion(only occurs at extreme conditions of temperature and pressure like interiors of stars) of Hydrogen takes place in The Sun's core.

Every four hydrogen atoms combine to form a Helium atom with a release of 26.7Mev of energy.

On a large scale this amount of energy can be very huge.

It is calculated that tis proces has being going on for the past 5\times 10^{9} years and with the amount of Hydrogen left will be sufficient to keep it going for the same amount of time in the future.

After this process ends,the Sun's core which will be mostly Helium,will start to cool and collapse under its own gravity.

5 0
3 years ago
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