Questions from College Physics

Q: Two lenses, separated by a distance of 21.0 cm

Two lenses, separated by a distance of 21.0 cm, are used in combination. The first lens has a focal length of +30.0 cm; the second has a focal length of −15.0 cm. An object, 2.0 mm long, is placed 1.8...

Q: Martin caught a fish and wanted to know how much it weighed

Martin caught a fish and wanted to know how much it weighed, but he didn’t have a scale. He did, however, have a stopwatch, a spring, and a 4.90 N weight. He attached the weight to the spring and foun...

Q: You have been employed by the local circus to plan their human

You have been employed by the local circus to plan their human cannonball performance. For this act, a spring-loaded cannon will shoot a human projectile, the Great Flyinski, across the big top to a n...

Q: A converging lens with a focal length of 5.500 cm

A converging lens with a focal length of 5.500 cm is placed 8.00 cm to the left of a diverging lens with a focal length of −4.20 cm. An object that is 1.0 cm tall is placed 9.000 cm to the left of the...

Q: After being assaulted by flying cannonballs, the knights on the castle

After being assaulted by flying cannonballs, the knights on the castle walls (12 m above the ground) respond by propelling flaming pitch balls at their assailants. One ball lands on the ground at a di...

Q: A microscope has an eyepiece of focal length 2.00 cm

A microscope has an eyepiece of focal length 2.00 cm and an objective of focal length 3.00 cm. The eyepiece produces a virtual image at the viewer's near point (25.0 cm from the eye). (a) How far fro...

Q: The citizens of Paris were terrified during World War I when they

The citizens of Paris were terrified during World War I when they were suddenly bombarded with shells fired from a long-range gun known as Big Bertha. The barrel of the gun was 36.6 m long, and it had...

Q: An object is placed between a concave mirror with a radius of

An object is placed between a concave mirror with a radius of curvature of 18.0 cm and a diverging lens with a focal length of magnitude 12.5 cm. The object is 15.0 cm from the mirror and 20.0 cm from...

Q: The range R of a projectile is defined as the magnitude of

The range R of a projectile is defined as the magnitude of the horizontal displacement of the projectile when it returns to its original altitude. In other words, the range is the distance between the...

Q: An object is located at x = 0. At x =

An object is located at x = 0. At x = 2.50 cm is a converging lens with a focal length of 2.00 cm, at x = 16.5 cm is an unknown lens, and at x = 19.8 cm is another converging lens with focal length 4....