Все публикации

0:05:35

A logic chip used in a computer dissipates 3 W of power in an environment at 120°F, and has a heat t

0:07:09

A 15-cm-diameter aluminum ball is to be heated from80°C to an average temperature of 200°C. Taking t

0:21:25

A fabric used in air-inflated structures is subjected to a biaxial loading that results in normal st

0:02:52

When walking toward a concave mirror you notice that the image flips at a distance of 0.50 m. What i

0:05:04

How far from a concave mirror (radius 24.0 cm) must an object be placed if its image is to be at inf

0:07:16

Two plane mirrors meet at a 135 angle, Fig. 32-45. If light rays strike one mirror at 38' as shown,

0:12:44

The block of glass (n = 1.5) shown in cross section in Fig. 32-51 is surrounded by air. A ray of lig

0:01:48

The speed of light in ice is 2.29 X 10^8 m/s, What is the index of refraction of ice?

0:05:33

A light beam coming from an underwater spotlight exits the water at an angle of 56.0'. At what angle

0:12:56

A light beam strikes a 2.0-cm-thick piece of plastic with a refractive index of 1.62 at a 45 angle.

0:05:00

A flashlight beam strikes the surface of a pane of glass(n = 1.56) at a 63' angle to the normal. Wha

0:05:04

A diver shines a flashlight upward from beneath the water at a 38.5° angle to the vertical. At what

0:03:48

A helium-filled balloon escapes a child's hand at sea level and 20.0 C. When it reaches an altitude

0:10:03

It is observed that 55.50 mL of water at 20' C completely fills a container to the brim. When the co

0:06:29

What is the pressure inside a 38.0-L container holding 105.0 kg of argon gas at 20.0'C?

0:18:52

A police car sounding a siren with a frequency of1280 Hz is traveling at 120.0 km/h. (a) What freque

0:06:58

Two automobiles are equipped with the same single frequency horn. When one is at rest and the other

0:07:08

A bat at rest sends out ultrasonic sound waves at50.0 kHz and receives them returned from an object

0:04:51

The predominant frequency of a certain fire truck's siren is 1350 Hz when at rest. What frequency do

0:08:03

At a rock concert. a dB meter registered 130 dB when placed 2.2 m in front of a loudspeaker on the s

0:07:06

A person standing a certain distance from an airplane with four equally noisy jet engines is experie

0:08:28

If two firecrackers produce a sound level of 95 dB when fired simultaneously at a certain place, wha

0:02:34

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff

0:05:52

A mass resting on a horizontal, frictionless surface is attached to one end of a spring; the other e