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0
votes
What does the given equation: x = Asin(ky+wt+a) represent?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
The gravitational potential energy of a body at a distance “r” from the centre of the earth is V. Its weight at a distance “2r” from the centre of the earth is _____
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
The velocity with which an object should be projected from the surface of the earth such that it reaches a maximum height equal to “n” time the radius of earth “R” is _____
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
The value ofthe gravitational field in a region is given by g = 2i + 3j. What is the change in gravitational potential energy of a particle of mass 5kg when it is taken from the origin O(0,0) to a point P(10, -5)?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
The satellites orbiting the earth, eventually fall to the earth when they are left unsupervised or unattended because _____
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
Two satellites of masses 50 kg and 100 kg revolve around the earth in circular orbits of radii 9R and 16R. What is the ratio of speeds of the two satellites?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
Most waves used for communication purposes rely on geostationary satellites because _____
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
A geostationary satellite seems to be fixed in the sky because it does not orbit the earth.
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
A geosynchronous satellite always appears fixed in the sky.
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
A completely elastic solid body partially regains its shape after removal of external force. True or False?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
Stress in a solid body is defined as ___________ per unit area.
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
A car containing a beaker of water is moving horizontally on a level road. Consider two points, A & B, inside the water such that they are on the same horizontal level and are separated by a distance L.
answered
Oct 3, 2021
in
Class X
cbse
0
votes
Temperature is absolute. True or False?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
At a given temperature a body emits energy of a single wavelength corresponding to that temperature. True or False?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
Two bodies in thermal equilibrium can have different pressures. True or False?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
A block of mass 1kg is given a velocity of 5m/s on a horizontal flat surface. What will be the change in internal energy of the block-surface system,
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
The behavior of real gases approaches that of ideal gas in which of these following conditions?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
What is the ratio of densities of 2 gases, O2 & N2, having partial pressures in the ratio 2:3?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
Boyle’s law can be deduced from kinetic theory. True or False?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
0
votes
What is the ratio of specific heats for a monatomic gas?
answered
Oct 3, 2021
in
Class-XI-PHYSICS
cbse
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