Laws of Motion — Physics STD 11 Science — Question

Two planets are at distances R₁ and R₂ from the Sun. What will be the ratio of the squares of their periods?

An observer is stationed at x = 10cm. When a train moves in the y-axis with a velocity 10m/s, what is the apparent frequency?

Three containers have different area on the top surface and same base area. If equal volume of a liquid is put in them which will have more pressure at its base?

Is the law of commutation applicable in subtracting vectors?

For uniform circular motion does the direction of the centripetal force depend on the sense of rotation (i.e., clockwise or anti-clockwise)?

Calculate the time required to heat 20kg of water from 10°C to 35°C using an immersion heater rated 1000W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000J kg^-1 K^-1.

What is the mean translational kinetic energy of a mole of helium gas at 400K?

When a current passes through a resistor, its temperature increases. Is it an adiabatic process?

Is the value of temperature coefficient of expansion always positive?

When a bus in which passengers are travelling takes a sudden turn, why does the passenger falls outwards?