B. The Particles Have Less Kinetic Energy than those of..
The correct option is D.
Lumen is used to quantify the amount of total light energy that a source is putting out in all direction, thus, it refers to luminous output of a light source. Initial lumen refers to the luminosity of a light when it was first turned on; the luminosity is highest at this point.
Answer:
3 Minutes 2 seconds to 22 minutes 16 seconds
Explanation:
Lets assume the Mars to be at the closest distance to Earth. This distance (D) = 54.6 Million km
The signal travels at the speed of light, so speed of the signal (V) = 300000 km/s
So, the time (T) taken by the radio wave to reach Earth from Mars will be,


Thus, T = 182 Sec = 3 Minutes 2 seconds.
The radio wave will take minimum 03 Minutes 02 seconds to reach Earth. Here is should be noted that the distance between the two planets keep on changing as they revolve around the Sun. There will come a point when Mars is farthest from Earth and the distance (D) will be 401 Million km. Then, the time will change to ,

T = 1336.67 sec = 22.27 Minutes.
So the maximum time will be 22 minutes 16 seconds.
Answer:
It takes 0.43 seconds before the pendulum attains the maxium speed.
Explanation:
L= 0.75m
g= 9.8 m/s²
T= 2π * √(L/g)
T=1.73 sec
T(vmax) = T/4
T(vmax) = 0.43 sec
P=w/t
w=15
t=3
therefore, 5 watts (b)