In an extremely simplified explanation,
What happens is that the steam (heat) that is generated by the burning of coal is used to rotate the motor of the steam engine.
Answer:
See the explanation below.
Explanation:
This analysis can be easily deduced by means of Newton's second law which tells us that the sum of the forces or the total force on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = total force [N]
m = mass [kg]
a = acceleration [m/s²]
We must clear the acceleration value.

We see that the term of the mass is in the denominator, so that if the value of the mass is increased the acceleration decreases, since they are inversely proportional.
Answer:
0.80 c
Explanation:
The computation of speed is shown below:-
Here, The speed of the captain ship A report for speed of the ship B which is

where
indicates the speed of the ship A
indicates the speed of the ship B
and
C indicates the velocity of life
now we will Substitute 0.40c for A and 0.60 for B in the equation which is

after solving the above equation we will get
0.80 c
So, The correct answer is 0.80c
the father has to sit 0.5meter away from the kid because he is a 3/4 heavier that the kid
Answer:
2.92682 m

250000000000 Hz

0.21126 m
0.12244 m
Explanation:
c = Speed of light = 
= Wavelength
f = Frequency
Wavelength is given by

The wavelength is 2.92682 m
Frequency is given by

The frequency is 

The frequency is 250000000000 Hz

The wavelength is 

The wavelength is 0.21126 m

The wavelength is 0.12244 m