Waves — Physics STD 11 Science — Question

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.

of the three Young's modulus of elasticity, Bulk modulus and shear modulus is possible in all the three states of matter (solid, liquid and gas)?

Write the expression for distance covered in n^th second by a uniformly accelerated body.

Answer the following:
The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy required for burning obtained? The rocket or the atmosphere?

Name at least two prominent phenomena which provide conclusive evidence of molecular motion.

Can the direction of velocity change while keeping the value of acceleration constant?

Why the amplitude of the vibrating pendulum should be small?

Two springs of force constant k₁ and k₂ are joined in parallel. What is the force constant of the combination?

When can liquid be in equilibrium?