Units and Measurements — Physics STD 11 Science — Question

Consider the energy density in a solenoid at its centre and that near its ends. Which of the two is greater?

Answer the following :
There were two fixed points in the original Celsius scale as mentioned above which were  assigned the number 0°C and 100°C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale?

What is the number of degree of freedom of a bee flying in a room?

A hollow sphere, a solid sphere, a disc and a ring all having same mass and radius are rolled down on an inclined plane. If no slipping takes place, which one will take the smallest time to cover a given length?

Why is it easier to swim in sea water than in fresh water?

Express 60°C in °F.

An AC source is connected to a capacitor. Will the rms current increase, decrease or remain constant if a dielectric slab is inserted into the capacitor?

Four 2cm × 2cm × 2cm cubes of ice are taken out from a refrigerator and are put in 200ml of a drink at 10°C.

1. Find the temperature of the drink when thermal equilibrium is attained in it.
2. If the ice cubes do not melt completely, find the amount melted. Assume that no heat is lost to the outside of the drink and that the container has negligible heat capacity. Density of ice = 900kg-m^-3, density of the drink = 1000kg-m^-3, specific heat capacity of the drink = 4200Jkg^-1-K^-1, latent heat of fusion of ice = 3.4 × 10⁵J-kg^-1.

Acceleration due to gravity decreases more rapidly _________ earth surface.

Read each statement below carefully and state with reasons, if it is true or false:
Each component of a vector is always a scalar,