Physics-
General
Easy
Question
A balloon rises from rest with a constant acceleration 
. A stone is released from it when it has risen to height 
. The time taken by the stone to reach the ground is
The correct answer is:
The velocity of balloon at height , 
When the stone released from this balloon, it will go upward with velocity, 
(Same as that of balloon). In this condition time taken by stone to reach the ground
Related Questions to study
Physics-
Two cars 
are moving with same speed of 
along same direction. If a third car 
coming from the opposite direction with a speed of 
meets two cars in an interval of 5 min, the distance of separation of two cars should be (in km)
Two cars are moving with same speed of along same direction. If a third car coming from the opposite direction with a speed of meets two cars in an interval of 5 min, the distance of separation of two cars should be (in km)
Physics-General
Physics-
The wind appears to blow from the north to a man moving in the north-east direction. When he doubles his velocity the wind appears to move in the direction 
east of north. The actual direction of the wind is
The wind appears to blow from the north to a man moving in the north-east direction. When he doubles his velocity the wind appears to move in the direction east of north. The actual direction of the wind is
Physics-General
Physics-
A body falls from a height 
(at New Delhi). The ratio of distance travelled in each 
during 
to 
second of the journey is
A body falls from a height (at New Delhi). The ratio of distance travelled in each during to second of the journey is
Physics-General
Physics-
A man throws balls with the same speed vertically upwards one after the other at an interval of two seconds. What should be the speed of the throw so that more than two balls are in the sky at any time (Given 
)
A man throws balls with the same speed vertically upwards one after the other at an interval of two seconds. What should be the speed of the throw so that more than two balls are in the sky at any time (Given )
Physics-General
Physics-
The displacement- time graph for two particles 
and 
are straight lines inclined at angles of 
and 
with the time axis. The ratio of velocities of 
is
The displacement- time graph for two particles and are straight lines inclined at angles of and with the time axis. The ratio of velocities of is
Physics-General
Physics-
The velocity-time relation of an electron starting from rest is given by 
where 
. The distance traversed in first 3 s is
The velocity-time relation of an electron starting from rest is given by where . The distance traversed in first 3 s is
Physics-General
Physics-
Two trains are moving with equal speed in opposite directions along two parallel railway tracks. If the wind is blowing with speed 
along the track so that the relative velocities of the trains with respect to the wind are in the ratio 
, then the speed of each train must be
Two trains are moving with equal speed in opposite directions along two parallel railway tracks. If the wind is blowing with speed along the track so that the relative velocities of the trains with respect to the wind are in the ratio , then the speed of each train must be
Physics-General
Physics-
Look at the graphs [a] to [d] carefully and indicate which of these possibly represents one dimensional motion of a particle
Look at the graphs [a] to [d] carefully and indicate which of these possibly represents one dimensional motion of a particle
Physics-General
Chemistry-
Physical adsorption
Physical adsorption
Chemistry-General
Chemistry-
Adsorption is multilayer in the case of
Adsorption is multilayer in the case of
Chemistry-General
Chemistry-
In physical adsorption, the gas molecules are held on solid surface by
In physical adsorption, the gas molecules are held on solid surface by
Chemistry-General
Chemistry-
When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid
When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid
Chemistry-General
Chemistry-
Point out the wrong statement :Physical adsorption is characterised by
Point out the wrong statement :Physical adsorption is characterised by
Chemistry-General
Chemistry-
A solid acts as an adsorbent because it has
A solid acts as an adsorbent because it has
Chemistry-General
Chemistry-
When the temperature is raised, the viscosity of liquid decreases, this is because
When the temperature is raised, the viscosity of liquid decreases, this is because
Chemistry-General
