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.
Three 2-µF capacitors are arranged as seen in the circuit above . The effective capacitance be...
Which of the following sets of quantities is fundamental? ...
Boyle’s law may be Written as ...
A sealed flask contains 600cm3 of air at 27°C and is heated to 35°C at constant pressure. Th...
The diagram above represents a transverse travelling wave. Which two points are 180° out of phas...
One special advantage of alcohol over mercury as a thermometric liquid is its? ...