Motion in a Straight Line — Physics STD 11 Science — Question

Each side of a cube increases by 0.01% on heating. How much is the area of its faces and volume increased?

Why does a child feel more pain when she falls down on a hard cement floor, than when she falls on the soft muddy ground in the garden?

Choose the correct alternative :
(a) If the zero of potential energy is as infinity, the total energy of an orbiting satellite is negative of its kinetic/potential energy.
(b) The energy required to launch an orbiting satellite out of earth's gravitational influence is more/ less than the energy required to project a stationary object at the same height (as the satellite) out of earth's influence.

Is reversible process possible in nature?

“All black surfaces are not good radiators.” Comment.

What is the difference between a tone and a note?

The position of a particle moving in the X-Y plane at any time t is given by; x = (3t² - 6t) meters; y = (t² – 2t) meters. Select the correct statement:

1. Acceleration is zero at t = 0
2. Velocity is zero at t = 0
3. Velocity is zero at t = 1 second
4. Velocity and acceleration of the particle are never zero

What would happen if gravity suddenly disappears?

Pick out the only vector quantity in the following list :
Temperature, pressure, impulse, time, power, total path length, energy, gravitational potential, coefficient of friction, charge.