(A) to make it smooth and frictionless

(B) to make it rust-proof

(C) to reduce heat loss by radiation

(D) to make it more durable

(A) pascal

(B) cyne

(C) newton

(D) Jule

(A) Increase the friction between the wheel and the axle

(B) Reduce the friction between the wheel and the axle

(C) Reduce the friction between the ground and the wheel

(D) None of the above

(A)diffusion

(B) viscosity

(C) surface tension

(D) capillarity

(A) 3

(B) 2

(C) 4

(D) 1

(A)resistance

(B) charge

(C) potential

(D) charge/potential ratio

(A) total internal reflection

(B) refraction

(C) diffraction

(D) reflection and refraction

A) the surface of ice is smooth

B) ice is cold

C) the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water

D) the pressure on the ice due to skate raises its melting point

(A) Reflection of light & Refraction of light

(B) Dispersion of light

(C) Total Internal Reflection

(D) Refraction of light & Total Internal Reflection of light

(A) do not produce noise during the operation

(B) are easy to produce

(C) can produce perfectly homogeneous solutions

(D) do not produce chemical reactions in the solution