Physics II partial test

What's temperature?

• Temperature is a measure of the speed of light in a substance or object.
• Temperature is a measure of the average kinetic energy of particles in a substance or object.
• Temperature is a measure of the amount of water in a substance or object.
• Temperature is a measure of the brightness of a substance or object.

What's heat?

• Heat is a type of matter.
• Heat is a type of force.
• Heat is a type of light.
• Heat is a form of energy.

Why thermal expansion occurs?

• Thermal expansion occurs due to the increase in temperature causing particles to vibrate more and occupy more space.
• Thermal expansion occurs due to the lack of particles in the material.
• Thermal expansion occurs due to the decrease in temperature causing particles to vibrate less and occupy less space.
• Thermal expansion occurs due to the material being compressed.

A (a)   is a measure temperature in relation to convenient and stable parameters or reference points, such as the freezing and boiling point of water. To use them ge have an instrument called​ (b)   to get the temperature of the objects.

• Temperature scales
• Thermometer
• Temperature gauge
• Heat measurer
• Cold meter

Match the following concepts

• 0th thermodynamic law

• if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other.

• 2nd thermodynamic law

• Heat does not naturally flow from a cool body to a warmer; work must be expended to make it do so

• 1st thermodynamic law

• The energy of the universe remains the same.

What does mechanical equivalent of heat stand for?

• Interchangeability of mechanical work and heat
• Transfer of electrical energy into chemical energy
• Transformation of sound waves into mechanical energy
• Conversion of light into heat energy

Match the following heat transfer types

• Thermal convection

• Transmits as an electromagnetic wave through both matter and vacuum.

• Thermal conduction

• Transfer of heat from one place to another due to the movement of fluid

• Thermal radiation

• Heat is transferred from the hotter end to the colder end of an object.

A 37 years old lady, is 168cm tall, and her weight is 72Kg. What's the amount of calories that she requires daily?

BMR= (10 x Weight) + (6.25 x height) + (5 x age) - 161

Mathematical Equivalence

ON

An aluminum flagpole is 33 m high. By how much does its length increase as the temperature increases by 15 C◦? [Use αAl = 23 × 10−6/ C◦.]

Δ L = α L Δ T

Mathematical Equivalence

ON

How much heat is absorbed by 20g granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C? (Specific heat capacity of granite is 0.1 cal/gºC)

Mathematical Equivalence

ON