metals are good conductor of heat
Actually the correct answer would be metals have high thermal conductivity than plastics as soon as you touch the pen your body heat is emitted onto the metal cap faster as you are cold metal cap becomes cooler.
3.3 km, 0.30 km
DISTANCE = SPEED * TIME TAKEN d1=300*5=1500 d2=300*6=1800 maximum distance=d1+d2 =1500+1800 =3300 metres=3.3km minimum distance=d2-d1 =1800-1500 =300 metres=0.3km
inversely proportional to square of
The intensity of light observed from a source of constant intrinsic luminosity falls off as the square of the distance from the object. This is known as the inverse square law for light intensity.
at a place in a valley below sea level
Because at a place valley below sea level atmospheric pressure is more so it required high temperature to boil.
All of these
Radio telescope is a device used in radio astronomy for detecting and recording radio waves coming from stars and other celestial objects.