20/40=0.5 g/cm^3 becuase, mass/volume=density.
Answer:
Electric switch is commonly known as the key of an electric circuit.
Answer:
Maximum distance of image from mirror is equal to focal length of the mirror
Explanation:
As we know by the equation of mirror we have

here we know for convex mirror
object position is always negative as it will be placed behind the mirror always
while the focal length of the convex mirror is always taken positive
So here we have


so here maximum value of image distance is equal to focal length of the mirror
Answer:
B : It will avoid the distortion from the atmosphere and give scientists more accurate data
Explanation: