Iona Prep Physics Problems from the textbook

Ch 15 - Page 425

# 49 Two flutists are tuning up. If the conductor hears the beat frequency increasing, are the two flute frequencies getting closer together or father apart?

# 52 You hear the sound of the firing of a distant cannon 5.0 seconds after seeing the flash. How far are you from the cannon?

# 53 You shout across a canyon and hear the echo 3.0 seconds later. How wide is the canyon?

# 54 A sound wave has a freqauency of 4700 Hz and travels along a steel rod. If the distance between compressions (regions of high pressure) is 1.1 m, what is the speed of the wave?

#55 The sound emitted by bats has a wavelength of 3.5 mm. What is the sound's frequency?

#79 Two instruments are playing musical note "A" (440 Hz). A beatnote with a frequency of 2.5 Hz is heard. Assuming that one instrument is playing the correct pitch, what is the frequency of the pitch played by the second instrument?

Ch 16 Fundamentals of light

Page 447

#14 What is the frequency of oxygen's spectral line if its wavelength is 513 x10^-9 m ?

Ch 17 - Reflection and Mirrors

Page 460

#2 If the angle of incidence of a ray of light is 42 deegrees, what is each of the following? (a) angle of reflection (b) angle the incident ray makes with the mirror (c) the angle between the incident ray and the reflected ray.

Page 469

# 14 A 3.0 cm tall object is 20.0 cm from a 16.0 cm radius concave mirror. Determine the image position and image height.

#15 A concave mirror has a 7.0 cm focal length. A 2.4 cm tall object is 16.0 cm from the mirror. Determine the image height.

#16 An object is near a concave mirror of 10.0 cm focal length. The image is 3.0 cm tall, inverted, and 16 cm from the mirror. What are the object position and object height?

Page 472

# 21 A 1.8 m tall girl stands 2.4 m from a store's security mirror. Her image appears to be 0.36 m tall. What is the focal length of the mirror?

Page 479

#53 A ray of light strikes a mirror at an angle of 38 degrees to the normal. What is the angle that the reflected ray makes with the normal?

#54 A ray of light strikes a mirror at an angle of 53 degrees to the normal. (a) What is the angle of reflection? (b) What is the angle between the incident ray and the reflected ray?

#55 A ray of light incident upon a mirror makes an angle of 36 degrees with the mirror. What is the angle between the incident ray and the reflected ray?

#56 A person is standing 1.2 m in front of a plane mirror and wants to take a picture of the image. At what distance should the camera lens be focused?

# 61 A concave mirror has a focal length of 10.0 cm. What is its radius of curvature?

#65 Light from a star is collected by a concave mirror. How far from the mirror is the image of the star if the radius of curvature is 150 cm?

#69 A dentist uses a small mirror with a radius of 40 mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 16 mm from the tooth, what is the magnification of the image?

#70 A 3.0 cm tall object is 22.4 cm from a concave mirror. If the mirror has a radius of curvature of 34.0 cm, what are the image position and height?

#72 Sunlight falls on a concave mirror and forms an image that is 3.0 cm from the mirror. An object that is 24 mm tall is placed 12.0 cm from the mirror. Find the image location and size.

#76 An object is located 4.4 cm in fromt of a concave mirror with a 24.0 cm radius. Locate the image.

#79 A convex mirror is needed to produce an image one-half the size of an object and located 36 cm behind the mirror. What focal length should the mirror have?

#80 A convenience store uses a surveillance mirror to monitor the store's aisles. Each mirror has a radius of curvature of 3.8 m. What is the image position of a customer who stands 6.5 m in front of the mirror?

#84 A 1.6 m tall person is 3.2 m from a convex mirror. What is the focal length of the mirror if her image appears to be 0.28 m tall?