A parachute attains a terminal velocity when
...A parachute attains a terminal velocity when
its density is equal to the density of air
the viscous force of the air and the upthrust completely counteract its weight
it expands as a result of reduced external pressure
the viscous force of the air is equal to the sum of the weight and upthrust
Correct answer is B
No explanation has been provided for this answer.
What flows to the positively charged conductor by connecting it to the earth? ...
Light from the Sun reaches us in nearly ...
A galvanometer has a resistance of 5Ω. By using a shunt wire of resistance 0.05Ω, the ga...
What part of the camera corresponds to the iris of the eye? ...
A galvanometer of resistance 20Ω is to be provided with a shunt that 110 of th...