# physics chapter 21

## physics chapter 21

﻿Physics Homework Syllabus
March 21, 2014

21.1a Homework: Read section 21.1, then do the section 21.1a homework.

Due date: ________________________

21.1b Homework: Read section 21.1, then do the section 21.1b homework.

Due date: ________________________

21.1c Homework: Read section 21.1, then do the section 21.1c homework.

Due date: ________________________

21.2 Homework: Read section 21.2, then do the section 21.2 homework.

Due date: ________________________

21.3 Homework: Read section 21.3, then do the section 21.3 homework.

Due date: ________________________

Laboratory 22A: Light and Color

Due date: ________________________

22.1 Homework: Read section 22.1, then do the section 22.1 homework.

Due date: ________________________

22.2 Homework: Read section 22.2 homework, then do the section 22.2 homework.

Due date: ________________________

Laboratory 22B: Reflection and Refraction. Also read section 22.3.

Due date: ________________________

22.3 Homework: Read section 22.3, then do the section 22.3 homework.

Due date: ________________________

Physics Test 21+22 will take place on Tuesday, April 8th.
Physics Section 21.1a Homework

1. Are sound waves longitudinal or transverse waves?

2. In many science fiction movies, there are battle scenes between spaceships. If a spaceship is destroyed, why wouldn’t any observers be able to hear the explosion?

3. How fast does an airplane need to be traveling to produce a sonic boom?

4. If you are standing 2 ft away from a wall, do you expect your echo from the wall to return to you more quickly on a warm day or a cold day? Why?

5. Why is it not possible to use sonar to determine the speed of an object that is traveling faster than the speed of sound?

6. What is the speed of sound in the air outside if the temperature is C?

7. You are standing outside on a 20°C when you see the flash from a cannon. If you hear the boom of...