A glass flask has a volume of 500 mL at a temperature of 20°C. The flask contains of mercury at
The temperature of the mercury and flask is raised until the mercury reaches the reference mark. The coefficients of volume expansion of mercury and glass are
18 × 10-5 K-1 and 2.0 × 10-5 K-1, respectively. The temperature at which this occurs is closest to
A) 122°C.
B) 112°C.
C) 102°C.
D) 110°C.
E) 132°C.
Answer: A
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The emissivity of an ideal reflector has which of the following values?
a. 0 c. 100 b. 1 d. infinity
An astronomer records the spectrum of light coming from a distant star. Describe what information the astronomer can deduce from this stellar spectrum, and what physical principles she would apply
What will be an ideal response?
Detailed measurements of the disk and central bulge region of our Galaxy suggest our Milky Way is a:
A) normal spiral galaxy. B) barred spiral galaxy. C) very flat elliptical galaxy. D) very dusty irregular galaxy. E) quasar.
A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV. What is maximum kinetic energy of the photoelectrons produced?
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