I've heard of radio telescopes before on tv, I think they emit waves and measure how they are refracted/diffracted.
Thanks,
Gavin M George
Answer:

Explanation:
= Density of water = 
= Change in volume = 
= Time elapsed = 1 minute = 60 seconds
Mass flow rate is given by

The mass flow rate is
.
Answer:
v = 23.87 m/s
Explanation:
Given that,
The radius of wheels, r = 0.380 m
The wheels rotate once every 0.1 s
We need to find the linear velocity of the wheels. The linear velocity of a wheel is given by :

So, the required linear velocity of the wheel is equal to 23.87 m/s.
Answer:
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
Answer:
Explanation:
a = F / m
where a is acceleration , F is thrust and m is mass
taking log and differentiating
da / a = dF / F - dm / m
(da / a)x 100 = (dF / F)x100 - (dm / m) x100
percentage increase in a = percentage increase in F - percentage increase in m
= percentage increase in acceleration a = 39 - 13 = 26 %
required increase = 26 %.