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Maurinko [17]
3 years ago
13

A train travels 98 kilometers in 4 hours, and then 99 kilometers in 1 hours. What is its average speed?

Physics
1 answer:
OverLord2011 [107]3 years ago
4 0
Distance 1=98km,time 4 hrs
distance 2=99km,time 1 hrs
total distance travelled /total time taken.
98+99=197/4+1=5
average speed=39.5km per hour
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Average acceleration of the baseball: -101 m/s^2

Explanation:

Since the motion of the baseball is a uniformly accelerated motion, we can use the following suvat equation:

v^2-u^2=2as

where

u is the initial velocity

v is the final velocity

a is the acceleration

s is the displacement of the object

For the baseball in this problem, we have:

u = 2.2 m/s is the initial velocity

v = 0 is the final velocity (it comes to a stop)

s = 24 mm = 0.024 m is the displacement of the ball while decelerating

Therefore, we can solve for a to find the acceleration:

a=\frac{v^2-u^2}{2s}=\frac{0-2.2^2}{2(0.024)}=-101 m/s^2

where the negative sign means the baseball is slowing down.

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What is your opinion on Fluorinated gases
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Answer:

\nu =1166\times 10^{20}Hz  

Explanation:

We have given the rest mass of SPARTYON = 945 times of mass of electron

We know that mass of electron =9.11\times 10^{-31}kg

So mass of SPARTYON =945\times 9.11\times 10^{-31}=8608.95\times 10^{-31}kg

Speed of light c=3\times 10^8m/sec

According to Einstein equation energy is given by

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So 77480.55\times 10^{-15}=6.6\times 10^{-34}\nu

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