Example: 1. A heating coil is immersed in a 100. g sample of liquid water which boils at 99.61°C in an open
insulated beaker on a laboratory bench at 1.0 x 10^5 Nm-2 pressure. In this process, 10 % of the liquid is
converted to the gaseous form at a pressure of 1.0 x 10 ^5Nm-2. A current of 2.00 A flows through the heater
from a 12.0 V battery for 1 x 10s to effect the transformation. The densities of liquid and gaseous
water under these conditions are 997 and 0.590 kg m-3, respectively. Calculate q and w for the process
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What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒