Answer: Option (B) is the correct answer.
Explanation:
The radiation in which waves of electromagnetic field travel or propagate through the space and carries electromagnetic radient energy is known as electromagnetic radiation.
The relation between energy and frequency is as follows.
............ (1)
where, E = energy
h = plank's constant
= frequency
Therefore, the frequency of the emitted radiation is directly proportional to its energy.
Also, frequency is proportional to c over wavelength. The relation is as follows.
........ (2)
where, = frequency
c = speed of light
= wavelength
Placing the value of frequency from equation (2) to equation (1) as follows.
Thus, the wavelength of the emitted radiation is inversely proportional to its energy.
Answer:
The answer is "512 J".
Explanation:
bullet mass
initial speed
block mass
initial speed
final speed
Let will be the bullet speed after collision:
throughout the consevation the linear moemuntum
The kinetic energy of the bullet in its emerges from the block
Answer:
Mirages happen when the ground is very hot and the air is cool.
Explanation:
They happen when light passes through two layers of air with different temperatures. The desert sun heats the sand, which in turn heats the air just above it. The hot air bends light rays and reflects the sky.
When you see it from a distance, the different air masses colliding with each other act as a mirror.
Answer:
Distance between centre of Earth and centre of Moon is 3.85 x 10⁸ m
Explanation:
The attractive force experienced by two mass objects is known as Gravitational force.
The gravitational force is determine by the relation:
....(1)
According to the problem,
Mass of Moon, m₁ = 7.35 x 10²² kg
Mass of Earth, m₂ = 5.97 x 10²⁴ kg
Gravitational force experienced by them, F = 1.98 x 10²⁰ N
Universal gravitational constant, G = 6.67 x 10⁻¹¹ Nm²kg⁻²
Substitute these values in equation (1).
d = 3.85 x 10⁸ m