Would anyone pls help me on these questions Thanks

Physics

2 answers:

Karolina [17]3 years ago

5 0

Number 1 is 0, number 2 is moving, number 3 is Joules, number 4 is a thermometer, number 5 is gas, number 6 is more, number 7 is specific heat. Hope this was helpful

Alenkinab [10]3 years ago

3 0

1. 0°C
2. Motion
3. Joules
4. Thermometer
5. Gas
6. Less
7. Temperature

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Part 2) Maximum speed equals 39.66 m/s.

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The final speed of the train when it completes half of it's journey is given by third equation of kinematics as

$v^{2}=u^2+2as$

where

'v' is the final speed

'u' is initial speed

'a' is acceleration of the body

's' is the distance covered

Applying the given values we get

$v^2=0+2\times 1.30\times \frac{1210}{2}\\\\v^{2}=1573\\\\\therefore v=39.66m/s$

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Since the deceleration is same as acceleration hence the time to stop in the same distance shall be equal to the time taken to accelerate the first half of distance

Thus total time of journey equals $T=2\times 30.51\approx61seconds$