181.
The process of heat transfer from object to another because of molecular motion and interaction is called:
A
Convection
B
Conduction
C
Radiation
D
Induction
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The process of heat transfer from object to another because of molecular motion and interaction is called:
Convection
Conduction
Radiation
Induction
A silver tea spoon is placed in a cup filled with hot tea. After some time, the exposed end of the spoon becomes hot even without a direct contact with the liquid. This phenomenon can be explained by:
Thermal expansion
Conduction
Convection
Radiation
Mechanical equivalent is associated with:
Newton
Kelvin
Joule
Boltzmann
An ideal gas with an internal energy U initially at 0 °C is heated to 273 °C. What is the new internal energy in terms of U?
U
1/2U
1/4U
2U
A sample of ideal gas has an internal energy U and is then compressed to one-half of its original volume while the temperature stays the same. What is the new internal energy of the ideal gas in terms of U?
U
1/2U
1/4U
2U
Kinetic Theory is based on an ideal gas model. The following statements about the ideal gas are true EXCEPT:
The average molecular kinetic energy is directly proportional to the absolute temperature
All molecules move with the same speed
All molecules make elastic collisions with each other and the walls of the container
The attractive force between the molecules can be ignored
The average molecular kinetic energy of a gas depends on:
Pressure
Volume
Temperature
Number of moles
The absolute temperature of an ideal diatomic gas is quadrupled. What happens to the average speed of molecules?
Quadruples
Doubles
Triples
Increases by a factor of 1.41
A container with rigid walls filled with a sample of ideal gas. The absolute temperature of the gas is doubled. What happens to the pressure of the gas?
Doubles
Quadruples
Triples
Decreased to one-half
A container filled with a sample of an ideal gas at the pressure of 1.5 atm. The gas is compressed isothermally to one-fourth of its original volume. What is the new pressure of the gas?
3 atm
4 atm
5 atm
6 atm
Which of the following temperature scales doesn't have negative numbers?
Celsius
Kelvin
Reaumur
Fahrenheit
An aluminum plate has a circular hole. If the temperature of the plate increases, what happens to the size of the hole?
Increases
Decreases
Stays the same
Increases the top half of the hole
What is the name of the following statement: "When two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium with each other"?
First Law of Thermodynamics
Second Law of Thermodynamics
Mechanical equivalent of heat
Zeroth Law of Thermodynamics
Sounds above 20000Hz are called
ultracool
ultrasound
infra-audio
infrasound
The part of the ear that responds to sound waves like a microphones diaphragm is the
lobe
eardrum
bones of the middle ear
fluid in the inner ear
Hitting a drum harder makes the sound
higher
lower
louder
softer
An animal that can hear sound frequencies higher than a human child is
a human adult
a cod fish
a bat
an eagle
Which of the following does not describe a sound wave?
transverse wave
longitudinal wave
compression wave
push-pull wave
Sound travels fastest in
a vacuum
the sea
the atmosphere
a broom stick
Another name for the unit Hertz is
cycles per second
seconds per cycle
metres per second
decibels