# Thermal Expansion Questions and Answers

Physics

Thermal ExpansionWhen heat transfers from warmer to cooler, the molecules ______ .
(A) move closer and speed up
(B) move closer and speed up
(C)spread out and speed up
(D)move closer and slow down

Physics

Thermal ExpansionIn the laboratory a student finds that it takes 61.0 Joules to increase the temperature of 12.7 grams of solid zinc from 22.1 to 35.4 degrees Celsius. The specific heat of zinc calculated from her data is [J/g°C.

Physics

Thermal ExpansionA surveyor has a steel measuring tape that is calibrated to be 100.000 m long (.e., accurate to
+-1 mm) at 20°C.
If she measures the distance between two stakes to be 75.175 m on a 3°C day, does she need to add or subtract a correction factor to get the true distance?
She needs to add the correction factor to get the true distance.
She needs to subtract the correction factor to get the true distance.
She does not need to add or subtract the correction factor because the value shown on the measuring tape
shows the true distance.
How large, in mm, is the correction factor?
Express your answer in millimeters.

Physics

Thermal ExpansionAn aluminum rod is 23.4 cm long at 20°C and has a mass of 350 g. If 15,000 J of energy is added to the rod by heat, what is the change in length of the rod? (The average coefficient of linear expansion for aluminum is 24 x 10-6 (°C)-¹.) mm

Physics

Thermal ExpansionThe ends Q and R of two thin wires, PQ and RS, are soldered (joined) together. Initially, each of the wire has a length of 1 m 10°C. Now, the end P is maintained at 10°C, while the end S is heated and maintained at 400°C. The system is thermally insulated from its surroundings. If the thermal conductivity of wire PQ is twice that of the wire RS and the coefficient of linear thermal expansion of PQ is 1.2 × 10³ K -1 -¹,
the change in length of the wire PQ is
(a) 0.78 mm (b) 0.90 mm (c) 1.56 mm (d) 2.34 mm

Physics

Thermal ExpansionAn aluminum (a = 24 x 10-6/K) pan (diameter = 23 cm, height = 6 cm) is filled with water (B = 0.21 x 10^-3/K). The initial temperature is 19 °C. The pan (and water) is then heated to 88 °C. Calculate the volume of water that overflows the pan OR the drop in water level.
a) 23. 72 cm³
b) 2.37 cm³
c) 36.1 cm³
d) 3.61 cm³

Physics

Thermal ExpansionAn old tank can fill up to 1L of pink liquid at 15°C, but at this temperature volume of the liquid in this tank is only 0.93L. If the coefficient of volume expansion of the pink liquid is 4.8 x 10^-4/Cº and the coefficient of linear expansion of the tank is 18 x 10^-6/C°, at what temperature the pink liquid will fill the tank completely.

Physics

Thermal ExpansionA steel beam being used in the construction of a skyscraper has a length of 32.000 m when delivered on a cold day at a temperature of 12.000°F. What is the length of the beam when it is being installed later on a warm day when the temperature is 92.000°F? (Give your answer to at least five significant figures.)

Physics

Thermal ExpansionYou have a Pyrex beaker what has a volume of 3 liters. It is filled to the very top with turpentine when both the beaker and the turpentine are 150. The full beaker is then placed on a hot plate until the beaker and turpentine are both heated to 47.9º.
The linear thermal coefficient for Pyrex is 3.2x10-6 °C-1.
The volume thermal coefficient for turpentine is 9x10-4 °C-¹.
Be exact for the first answer here.
What is the value of ß for the Pyrex beaker?
°C-1
Give three significant digits for the remaining answers.
What is the change in volume for the beaker?
liters
What is the change in volume for the turpentine?
liters
How much turpentine spills out of the beaker?
liters

Physics

Thermal ExpansionA student walking to class on a cold day (T = 1 °C) find a silver ring with an inner diameter of D = 1.55 cm. The silver has a coefficient of linear expansion of a = 19.9 x 10^-6 1/C.
Part (a) Input an expression for the rings inner diameter Dh, when the student warms it to their body temperature, Tb.
Part (b) What is the change in diameter in mm if Tb= 37 °C?

Physics

Thermal ExpansionA disk between vertebrae in the spine is subjected to a shearing force of 643 N. Find its shear deformation, using the shear modulus of 1.0 x 10⁹ N/m². The disk is equivalent to a solid cylinder 0.85 cm high and 7.4 cm in diameter.
Round your answer to 9 decimal places.

Physics

Thermal ExpansionThe temperature of 250 liters of ethyl alcohol is increased from 294 K to 324 K. The coefficient of volume expansion for ethyl alcohol is 1.12 x 10-4 per Celsius degree. What is the change in volume?

Physics

Thermal ExpansionTwo rods A and B of identical dimensions are at temperature 30°C. If A is heated upto 180°C and B upto T°C, then the new lengths are the same. If the ratio of the coefficients of linear expansion of A and B is 4:3, then the value of T is
A. 270°C
B. 230°C
C. 250°C
D. 200°C

Physics

Thermal ExpansionYears ago, a block of ice with a mass of about 20 kg was used daily in a home icebox. The temperature of the ice was 0.0°C when delivered. As it melted, how much heat did a block of ice that size absorb? The latent heat of fusion of water is 3.34 x 105 J/kg. Answer in units of J.

Physics

Thermal ExpansionYou are using a Type K thermocouple to measure the temperature of a process that operates in the range of 1000°C to 1100°C. In particular, you know that the thermoelectric voltage is 42.053 mV at 1020°C and 42.440 mV at 1030°C. Having no other data in between, and no way to look up the data on thermocouple tables, what is a good approximation for the thermoelectric voltage at 1027°C?

Physics

Thermal ExpansionAn aluminum rod is 17.4 cm long at 20°C and has a mass of 350 g. If 15,000 J of energy is added to the rod by heat, what is the change in length of the rod? (The average coefficient of linear expansion for aluminum is 24 x 10-6 (°C)-¹.)