Which object is likely to be the coldest? The object whose light spectrum is brightest in the
A -visible light.
B -ultraviolet.
C -infrared.
D -X-rays.
Answer: D. X-rays
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Indicate whether the statement is true or false
Specific Heat: A 4.0-kg aluminum block is originally at 10°C. If 160 kJ of heat is added to the block, what is its final temperature? The specific heat capacity of aluminum is 910 J/kg ? K.
A. 24°C B. 34°C C. 44°C D. 54°C
In the future, adaptive optics will greatly enhance the resolution of the Hubble Space Telescope
Indicate whether the statement is true or false
Two sounds of the same intensity are added together. The intensity of the resulting sound is how many decibels greater than the intensity of one of the original sounds? The resulting sound
1.will have twice the decibel level as one of the original sounds. 2.will have the same decibel level as one of the original sounds. 3.will be two decibels higher than the original sound. 4.will be three decibels higher than the original sound.