Q&A Hero

Q: A Doppler red shift indicates A) a shift toward lower frequencies. B) a shift toward longer wavelengths. C) that a light source is receding relative to the observer. D) all of these.

Q: A Doppler red shift indicates A) a shift toward higher frequencies. B) a shift toward shorter wavelengths. C) that a light source is approaching relative to the observer. D) none of these.

Q: The threshold of hearing is A) 0 dB. B) 180 dB. C) 200 dB. D) 70 dB. E) 1 dB.

Q: If a sound level increases by 20 dB, the intensity increases by a factor of ______________. A) one thousand B) one hundred C) ten D) ten thousand

Q: The intensity of a 70-dB whistle is quintupled. What is the new decibel level? A) 70 dB B) 55 dB C) 82 dB D) 350 dB

Q: The intensity of a 80-dB whistle is doubled. What is the new decibel level? A) 80 dB B) 77 dB C) 83 dB D) 160 dB

Q: A sound level of 19 dB is how many times as intense as one of 10 dB? A) 8 B) 9 C) 3 D) 18

Q: An increase of 50 dB increases the sound intensity by a factor of A) 10000. B) 500000. C) 100000. D) 50000.

Q: An increase of 20 dB increases the sound intensity by a factor of A) 10. B) 200. C) 100. D) 20.

Q: Which of the following sound frequencies lie(s) outside the audible range? A) 14 Hz B) 19 kHz C) 1800 Hz D) All of these

Q: Which of the following sound frequencies lie(s) outside the audible range? A) 25 Hz B) 35 kHz C) 4800 Hz D) All of these

Q: Which of the following sound frequencies lie(s) in the audible range? A) 16 Hz B) 8 kHz C) 1 MHz D) All of these

Q: Which of the following sound frequencies lie(s) in the audible range? A) 22 Hz B) 45 kHz C) 1 MHz D) All of these

Q: Which of the following sound frequencies lie(s) in the audible range?A) 29 HzB) 11 kHzC) 3500 HzD) All of these

Q: Sound is a(n) A) longitudinal wave. B) electromagnetic wave. C) transverse wave. D) standing wave.

Q: The radiation given off by the nucleus of an atom is called A) a microwave. B) a gamma ray. C) an X-ray. D) any of these.

Q: A sound with a frequency of 48 kHz is in the ______________ region of the sound spectrum. A) infrasonic B) ultrasonic C) audible D) visible

Q: A sound with a frequency of 1000 Hz is in the ______________ region of the sound spectrum. A) infrasonic B) ultrasonic C) audible D) visible

Q: A sound with a frequency of 11 Hz is in the ______________ region of the sound spectrum. A) infrasonic B) ultrasonic C) audible D) visible

Q: The region of the electromagnetic spectrum with frequencies just greater than those in the microwaves region is the ______________ region. A) infrared B) ultraviolet C) x-rays D) gamma rays E) visible

Q: The region of the electromagnetic spectrum with wavelengths just less than those in the infrared region is the ______________ region. A) visible B) x-rays C) gamma rays D) radio waves E) ultraviolet

Q: The region of the electromagnetic spectrum with frequencies just less than those in the infrared region is the ______________ region. A) microwaves B) x-rays C) gamma rays D) radio waves E) ultraviolet

Q: The region of the electromagnetic spectrum with wavelengths just greater than those in the microwaves region is the ______________ region. A) radio waves B) ultraviolet C) x-rays D) gamma rays E) visible

Q: Light waves travel fastest in A) water. B) glass. C) a vacuum. D) air. E) none of these; they travel at the same speed in all these media.

Q: A radar pulse returns 6.0 x 10-4 s after it was sent out and reflected by an object. What is the separation distance of the radar source and the object?A) 1.8 x 105mB) 9 x 104mC) 1.1 x 10"3mD) 5.6 x 10"4m

Q: Electromagnetic waves are A) longitudinal. B) reverse. C) transverse. D) a combination of these.

Q: Which of the following electromagnetic radiations has the greatest frequency? A) Ultraviolet B) Infrared C) Radio D) Visible

Q: Which of the following radiations has the greatest frequency? A) Infrared B) Visible C) Ultraviolet D) X-rays

Q: Which of the following radiations has the smallest frequency? A) Infrared B) Visible C) Ultraviolet D) X-rays

Q: Which of the following radiations has the smallest wavelength? A) Infrared B) Visible C) Ultraviolet D) X-rays

Q: Which of the following radiations has the longest wavelength? A) Infrared B) Visible C) Ultraviolet D) X-rays

Q: A disturbance in particle motion perpendicular to the wave velocity is called a A) transverse wave. B) acoustic wave. C) standing wave. D) longitudinal wave.

Q: A disturbance in particle motion parallel to the wave velocity is called a A) transverse wave. B) acoustic wave. C) standing wave. D) longitudinal wave.

Q: For a longitudinal mechanical wave, the particle motion is A) parallel to the direction of the wave velocity. B) perpendicular to the direction of the wave velocity. C) both parallel and perpendicular to the direction of the wave velocity. D) in all directions.

Q: For a transverse mechanical wave, the particle motion is A) both parallel and perpendicular to the direction of the wave velocity. B) parallel to the direction of the wave velocity. C) perpendicular to the direction of the wave velocity. D) in all directions.

Q: If a piece of ribbon were tied to a stretched string carrying a transverse wave, how would the ribbon be observed to oscillate? A) Perpendicular to the wave motion B) Parallel to the wave motion C) Neither (A) nor (B) D) Both (A) and (B)

Q: The major difference between transverse and longitudinal waves is the A) direction of the wave motion. B) phase difference. C) direction of the particle displacement with respect to the direction of wave motion. D) size of the waves.

Q: If a wave has a frequency of 8 Hz, it has a period of A) 1/8 s. B) 8.5 s. C) 8 s. D) 4 s.

Q: A series of ocean waves are moving past a surfer at a frequency of 25 waves per hour. Approximately how many waves would the surfer expect during 41 minutes? A) 1025 waves B) 17 waves C) 25 waves D) 37 waves

Q: A series of ocean waves, each 12.0 m from crest to crest and moving past an observer at a rate of 6.0 waves per second, has what speed? A) 72 m/s B) 2 m/s C) 6 m/s D) 0.5 m/s

Q: If a wave has a period of 0.100 sec, it has a frequency ofA) 1/10 Hz.B) 3.2 Hz.C) 100 Hz.D) 10 Hz.

Q: If a wave has a frequency of 12 Hz, it has a period of A) 1/12 s. B) 3.5s. C) 144 s. D) 12 s.

Q: Wave frequency could be given in A) 1/s. B) s-1 C) Hz. D) any of these.

Q: Wave amplitude is related to A) wave velocity. B) frequency. C) energy. D) wavelength.

Q: Wave velocity is inversely proportional to A) period. B) wavelength. C) amplitude. D) all of these.

Q: Wave period is the reciprocal of A) amplitude. B) frequency. C) wave velocity. D) all of these.

Q: Wave frequency is inversely proportional to A) amplitude. B) period. C) wave velocity. D) all of these.

Q: Which of the following characterize(s) a wave? A) Wavelength B) Amplitude C) Period D) All of these

Q: In measuring any temperature less than 500 Fahrenheit, which of the following scales will have the highest numeric reading? A) Fahrenheit B) Celsius C) Kelvin D) None of these

Q: Which of the following temperature scales has the smallest unit interval? A) Celsius B) Kelvin C) Fahrenheit D) None of these

Q: The Celsius degree is A) the same size as the Fahrenheit degree. B) larger than the kelvin. C) the same size as the kelvin. D) smaller than the Fahrenheit degree.

Q: A digital thermometer can make readings to the tenth of a degree at either the Celsius setting or the Fahrenheit setting. Which reading would be more precise? A) The Fahrenheit setting, since 1 degree Fahrenheit is smaller than 1 degree Celsius B) The Fahrenheit setting, since 1 degree Celsius is smaller than 1 degree Fahrenheit C) The Celsius setting, since 1 degree Fahrenheit is smaller than 1 degree Celsius D) The Celsius setting, since 1 degree Celsius is smaller than 1 degree Fahrenheit

Q: Temperature is a relative measure of A) latent heat. B) hotness and coldness. C) internal energy. D) specific heat.

Q: A temperature of "5 Kelvin is equivalent to _____ degrees Fahrenheit.A) -468.4B) 268.0C) -20.6D) -278.0

Q: A temperature of 110 Kelvin is equivalent to _____ degrees Celsius.A) 316.3B) 383.0C) 43.3D) -163.0

Q: A temperature of degrees "60 Fahrenheit is equivalent to _____ Kelvin.A) 221.9B) 213.0C) -51.1D) -333.0

Q: A temperature of degrees "95 Celsius is equivalent to _____ Kelvin.A) -630.4B) 178.0C) -70.6D) -368.0

Q: A temperature of degrees 230 Celsius is equivalent to _____ degrees Fahrenheit.A) -45.4B) 446.0C) 110.0D) -43.0

Q: A temperature of degrees 245 Fahrenheit is equivalent to _____ degrees Celsius.A) -18.4B) 473.0C) 118.3D) -28.0

Q: A quantity of ideal gas in a rigid container has a pressure of 1.00 x 106Pa at 0°C. If the pressure is increased to 1.75 x 106 Pa, what is the temperature of the gas after this is done?

Q: The piston of a cylinder containing a quantity of ideal gas is advanced so that the volume of the gas is decreased by one-half. A pressure gauge on the cylinder shows the pressure of the gas to have increased threefold in the process. By what factor does the temperature of the gas change?

Q: An ideal gas is confined to a container with an adjustable volume. If the number of molecules and the temperature are held constant, by what factor will the volume change when the pressure is tripled?

Q: The number of molecules in a container is tripled and the Kelvin temperature doubled. The volume remains unchanged. The new pressure will be how many times greater than the original pressure?

Q: A sample of gas has its number of molecules halved, its Kelvin temperature doubled, and its volume halved. What is the new pressure, relative to the original pressure?

Q: A constant volume and mass of helium gas at 27°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?

Q: How many kilocalories of heat would be needed to melt 0.12 kg of ice at 0°C and increase the temperature to 25°C?

Q: How much heat is required to melt 5.0 kg of ice at 0°C to water at 0°C?

Q: How much heat is necessary to change 20 g of ice at -10°C into water at 20°C?

Q: On a winter day the temperature drops from -5°C to -15°C overnight. If a pan sitting outside contains 0.40 kg of ice, how much heat is removed from the ice for this temperature change?

Q: An ice tray with 150 g of water at 30°C is placed in a freezer at -5°C. How much energy must be removed from the water to lower its temperature to the freezing point?

Q: A liter of water at room temperature (20°C) is heated to its boiling temperature. How many kilocalories of heat are required?

Q: When 10 kcal of heat is added to 2.0 kg of a substance, its temperature increases 20° C. What is the specific heat of the substance?

Q: To what temperature does 0F correspond on the Celsius scale?

Q: For a temperature of "40°F, what are the corresponding temperatures on thea. Celsius scale?b. Kelvin scale?

Q: It is 23°F outside.a. What is the Celsius temperature?b. If this Fahrenheit temperature were doubled, what would the new Celsius temperature be?

Q: A(n) ______________ transfers heat from a low-temperature reservoir to a high-temperature reservoir.

Q: The entropy of an isolated system always ______________ when natural processes occur.

Q: The second law of thermodynamics forbids a heat engine to have thermal efficiency of ______________.

Q: The energy balance in a thermodynamic process is expressed in the ______________.

Q: The first law of thermodynamics states that heat added to a closed system can change the internal energy of the system and/or do ______________.