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RideAnS [48]
3 years ago
14

100 POINTS Please answer this ASAP!!!!

Physics
2 answers:
Slav-nsk [51]3 years ago
8 0

The answer is B and D. As speed decreases, the temperature of the reaction decreases. Also, remember that kinetic is energy that it possesses due to its motion, so when we decrease the motion, we decrease the average kinetic energy.

I hope this helps! :)

damaskus [11]3 years ago
4 0

Answer:

I would say the average kinetic energy and the temperature.

Explanation:

Hope this helps:) Good luck!!

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a boat sailing against the current experiences an acceleration of -11 m/s^2 if the boats initial velocity is 44 m/s upstream, ho
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He drives 150 meters in 18 seconds. Assuming constant speed, what is his speed in meters per second?
ira [324]

Answer:

Explanation:

Givens

d = 150 meters

t  = 18 seconds

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3 years ago
A ball attached to a string is whirled around in a horizontal circle having a radius R. If the radius of the circle is changed t
ivanzaharov [21]

Answer:

twice the original speed

Explanation:

the centripetal force is the force of an object moving in a circle of turning and it is given by the expression

F=\frac{mv^{2} }{r}

where f = force of the object

          m = mass

         v = velocity

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first we need to know what the orignal speed will be then we can tell what will happen if the radius of the circle is changed to 4R.

from the expression for the centripetal force, we need to make the velocity subject of the formula

F = \frac{mv^{2} }{r} \\cross multiplying\\Fr =mv^{2} \\dividing both sides by m\\\frac{Fr}{m}=v^{2}   \\taking the square root of both sides\\v=\sqrt{\frac{Fr}{m} }

now, if the radius is changed to 4R

in the expression for v above i will need to just insert 4R in place of r

v=\sqrt{\frac{4rF}{m} } \\

the square root of 4 is 2,

therefore

v=2\sqrt{\frac{rF}{m} }

we can see that this is just twice of what the original speed was.

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4 years ago
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