The chemical composition of stars can be determined from lines in their spectra
Indicate whether the statement is true or false
T
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The technique called _______ uses a high-speed computer to monitor atmospheric distortion and adjust the optics of a telescope to partially compensate for the seeing
a. photometry b. chromatic aberration c. active optics d. spherical aberration e. adaptive optics
100 grams of molten lead (600°C) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21°C), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g×°C; the latent heat of fusion and the melting point of lead are 2.45 × 10^4 J/kg and 327°C.)
a. -145 b. -252 c. -302 d. -429 e. -100
Antiprotons and positrons are examples of ______________, which are not ordinary matter
Fill in the blank(s) with correct word
Three identical resistors are connected in series to a 12-V battery. What is the voltage across any one of the resistors?
A) 12 V B) 3 V C) 36 V D) 0 V E) 4 V