Question 1

Which of the following statements best describes the difference between heat and temperature?

Accepted Answer

Heat is the energy associated with the movement of particles, while temperature measures how hot or cold an object is compared to another object.

Question 2

A sample of metal with a mass of 25.0 g absorbs 275 J of energy, causing its temperature to rise from 20.0 $$^\circC to 34.0$$ $$^\circC. $$What is the specific heat of the metal?

Accepted Answer

$$0.79 \ \mathrm{J/g\cdot ^\circ C}$$

Question 3

Which of the following is an example of potential energy?

Accepted Answer

A compressed spring

Question 4

Convert a normal body temperature of 37 $$^\circC to $$Kelvin.

Accepted Answer

$$310 \ \mathrm{K}$$

Question 5

Which process describes the direct change from a solid to a gas without passing through the liquid state?

Accepted Answer

Sublimation

Question 6

A 100.0 g sample of water is heated from 25.0 $$^\circC to 75.0$$ $$^\circC. If $$the specific heat of water is $$4.18 \ \mathrm{J/g\cdot ^\circ C}$$, how much energy is absorbed?

Accepted Answer

$$20,900 \ \mathrm{J}$$

Question 7

Which of the following best explains why coastal regions have milder climates than inland regions?

Accepted Answer

Water has a high specific heat, so it moderates temperature changes.

Question 8

Which of the following is NOT a correct unit for measuring energy?

Accepted Answer

Kilogram (kg)

Question 9

Which statement about the heat of vaporization is correct?

Accepted Answer

It is the amount of heat required to convert a liquid to a gas at its boiling point.

Question 10

Which of the following forms of radiation has the greatest penetrating power?

Accepted Answer

Gamma rays

Question 11

A food label states that a serving contains 200 Calories. How much energy is this in joules? (1 Calorie = 1 kcal = 4184 J)

Accepted Answer

$$836,800 \ \mathrm{J}$$

Question 12

Which of the following is a correct statement about radioisotopes used in medical imaging?

Accepted Answer

They have short half-lives and decay within a few months.

Question 13

Which of the following is the best example of kinetic energy?

Accepted Answer

A person swimming

Question 14

Which of the following best describes the process of deposition?

Accepted Answer

A gas changes directly to a solid.

Question 15

Which of the following is a correct method for protecting oneself from radiation exposure?

Accepted Answer

Increasing the distance from the source

Question 16

Which of the following statements about specific heat is correct?

Accepted Answer

It is the amount of heat needed to raise the temperature of 1 g of a substance by 1 $$^\circC.$$

Question 17

Which of the following is a correct conversion for temperature from Celsius to Kelvin?

Accepted Answer

$$K = ^\circ C + 273$$

Question 18

Which of the following best describes the function of a calorimeter in nutrition studies?

Accepted Answer

It measures the energy released from food by burning it and measuring the heat released.

Question 19

Which of the following is a property of alpha particles?

Accepted Answer

They have low penetrating power and can be stopped by paper.

Question 20

Which of the following is a correct statement about the biological effects of radiation?

Accepted Answer

Gamma rays cause the most damage because they penetrate deeply into tissues.

Week 7 Study Notes: Temperature, Energy, States of Matter, and Radioactivity

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