The Doppler Effect...
<span>It describes an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other.</span>
Answer:
C
Explanation:
Which wavelength of the electromagnetic spectrum are shorter than visible light and carry more energy
A micro
B radio
C ultraviolet
F infrared
The correct answer is C
The visible light wavelength is of 7 × 10^-7 m while the ultraviolet is of other
4 × 10^-8 m
Therefore, ultravolet is shorter than visible light and carry more energy
Therefore, the correct answer is option C.
The answer is (A) the object must be at rest.
When all of the forces acting on an object balance, the net force is zero and hence the object will not move.
Yes, the direction might also change under some special circumstances.
we have to use newtons law of gravitation which is
F=GMm/r^2
G=6.67 x 10^<span>-11N kg^2/m^2
</span>M=<span>(15kg)
</span>m=15 kg
r=(3.0m)^2<span>
</span>putting values we have
<span>=(6.67 x 10^-11N kg^2/m^2)(15kg)(15kg)/(3.0m)^2 </span>
=1.67 x 10^-9N
