How much does the Earth weigh? Why does the moon appear in the daytime? ILL GIVE ANYONE WHO ANSWERS CORRECTLY OR TRY'S TO ANSWER THE BRAINLIEST AND ILL GIVE THEM EXTRA POINTS :)

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.

Aball of mass 0.3kg is released from rest at a height of 8m. how fast is it going when it hits the ground? accleration due to gravity is g=9.8m/s

Is a volume of space that is empty of matter.