What is a blackbody?
a. a perfect emitter and a perfect absorber of light b. a perfectly opaque object
c. a dense object having a temperature above absolute zero d. All of the other choices are correct.
d
You might also like to view...
Specific Heat: A 6.5-g iron meteor hits the earth at a speed of 295 m/s. If its kinetic energy is entirely converted to heat in the meteor, by how much will its temperature rise? The specific heat of iron is 113 cal/kg ? C°, and 1 cal = 4.186 J.
A. 92.0 C° B. 57,100 C° C. 0.147 C° D. 384 C°
A resistor R is connected across a battery of negligible internal resistance. If the resistance of R is cut in half, the power dissipated in R will ________ (indicate change, if any).
Fill in the blank(s) with the appropriate word(s).
If the decimal point is shifted to the right in a number expressed in powers-of-10 notation, the exponent, or power of 10, is ______________
Fill in the blank(s) with correct word
Addition by Components: You walk 53 m to the north, then you turn 60° to your right and walk another 45 m. Use components to determine the direction of your displacement vector. Express your answer as an angle relative to east.
A. 63° N of E B. 50° N of E C. 57° N of E D. 69° N of E