The mass equivalent of energy from an antenna radiating 10 K-watt for 24 hours is : [Mrt. 2016 (a) 9.6 x 10-9 kg (b) 8.6 x 10-8 kg (c) 10 kg (d) None of these
Answers
We have to find the mass equivalent of energy from an antenna radiating 10 kg watt for 24 hrs.
solution : Power, P = 10 kilo watt = 10,000 watt
time , t = 24 hrs = 24 × 3600 sec
now Energy , E = power × time
= 10,000 × 24 × 3600 J
From mass energy equation, E = mc²
m = E/c² , where c is speed of light in vacuum
so, m = (10,000 × 24 × 3600)/(3 × 10^8)² kg
= (24 × 36 × 10^6)/(9 × 10^16) kg
= 96 × 10^-10 kg
= 9.6 × 10^-9 kg
Therefore the mass equivalent of energy from an antenna radiating 10 kilo watt for 24 hrs is 9.6 × 10^-9 Kg
also read similar questions : If the sun radiates energy at the rate of 3.6 x 10 to power 33 ergs/sec the rate at which the sun is loosing mass is giv...
https://brainly.in/question/23206685
which of the following charges can exist on an oil drop( in millikan oil drop experiment).
(a)3.2 x 10^-19 C
(b)8.3 x ...
https://brainly.in/question/4581042
9.6x10^-9Answer:
Explanation:E=delta m xc^2
10*1000*24*60*60/c^2= 9.6x10^-9