A certain freezing prosess requires that room temperature be lowered from `40^oC` at the rate of `5^oC` every hour. What will be the room temperature 10 hours after the process begins?

At room temperature (27.0^(@)C) the resistance of a heating element is 100 Omega. What is the temperature of the element if the resistance is found to be 117 Omega. given that the temperature coefficient of the material of the resistor is 1.70 xx 10 ^(-4)"" ^(@)C^(-1).

The temperature at 12 noon was 10^oC above zero. If it decreases at the rate of 2^oC per hour until midnight, at what time would the temperature be 8^oC below zero? What would be the teperature at midnight?

A piece of copper and germanium are cooled from room temperature to 100 K. What happens to their resistivities ?

The following graph shows the temperature of a patient in a hospital,recorded every hour: (a)What was the patients temperature at 1 p.m? (b)When was the patient's temperature 38.5^@ C? (c)The patient's temperature was the samae two times during the period given.What were these two times? (d)What was the temperature at 1.30 p.m?How did you arrive at your answer? (e)During which periods did the patients temperature showed an upward trend?

The lower end of a capillary tube of diameter 2.00mm is dipped 8.00cm below the surface of water in a beaker. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiments is 7.30 times 10^2 Nm^-1 .1 atmospheric pressure =1.01 times 10^5 Pa density of water =1000 kg//m^3,g=9.80 ms^-2 . Also calculate the excess pressure.

A 12.5eV electron beam is used to bombard gaseous hydrogen at room temperature What series of wavelengths will be emitted.

What is the pressure inside the drop of mercury of radius 3.00mm at room temperature? Surface tension of mercury at that temperature (20^@C) is 4.65 times 10^-1 N m^-1 . The atmospheric pressure is 1.01 times 10^5 Pa . Also give the excess pressure inside the drop.