If an object has a mass of 20 kg, what is the force of gravity acting on it on earth? A. 32.67 N B. 2.04 kg C. 1.96 kg D. 196 N
2 answers:
Answer:
D. 196 N
Explanation:
The force of gravity acting on an object located at the Earth's surface is given by:
where
m is the mass of the object
g is the acceleration due to gravity
In this problem:
- m=20 kg is the mass of the object
- g = 9.81 m/s^2 is the acceleration due to gravity at Earth's surface
Substituting these data into the formula, we get
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Explanation:
Electromagnetic waves are the waves which are created as the result of the electrical waves which are perpendicular to each other and also perpendicular to the direction of propagation.
Electromagnetic spectrum is range of the frequencies and their respective wavelengths of the various type of the electromagnetic radiation.
In order of the increasing frequency and the photon energy and the decreasing wavelength the spectrum are:
radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.
The energy of the radio waves photons is the lowest of all the other waves in the electromagnetic spectrum.
Also,
Where,
h is Plank's constant having value
Thus, energy is directly proportional to the frequency. The radio waves have the lowest frequency.