Radio waves and visible light, as we perceive it, are both part of the EM spectrum. The only difference between them in terms of our perception is that we don't have receptors to 'see' radio waves. That's where radio receivers come into the picture*, to convert radio waves into sound impulses that we can hear.
Answer:
Explanation:
According to newton's law of gravitation , equal force of attraction are applied on two masses m₁ and m₂ placed at distance d . This force is given by the expression
F = G m₁ m₂ / d²
If one of the masses be earth with mass M then d = radius of earth R
Force F = G Mm₁ / R²
this force is applied on both the earth and mass m₁ in equal magnitude and in opposite direction.
In the formula F is proportional to m₁
among the given objects in the question , m₁ of object varies in the following order.
skyscraper > car > human being > basket ball
So Force F on the earth by them will also vary in the same order.
Answer:
The velocity of wave=2.5 m/s
Explanation:
We are given that
The distance between successive wave crest=
Time =
We have to find the the velocity of wave.
Frequency of wave=
The relation between frequency, wavelength and velocity is given by
Hence, the velocity of wave= 2.5 m/s
The answer is A. through fusion in stars and supernova.
