A plot of the temperature versus the energy per kg added to a piece of ice as it goes from below freezing at –10°C to becoming steam at 110°C consists of straight lines, some horizontal and some with an upward slope. What do the upward slopes represent?
a. specific heats
c. latent heats
b. reciprocals of specific heats
d. reciprocals of latent heats
B
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An effective way to passively cool a house is to _______
a. open all the windows b. use a light colored roofing material c. use concentrating collectors to provide air conditioning d. add more insulation on the south side of the house e. use thermal storage mass
The direction of a field line at a point in space shows the direction of the force that would act on a body placed at the point
Indicate whether the statement is true or false
A ray of light goes from one transparent material into another, as shown in the figure. What can you conclude about the indices of refraction of these two materials?
A) n1 ? n2 B) n1 > n2 C) n1 = n2 D) n2 ? n1 E) n2 > n1
The Hope Diamond weighs 44.5 carats. There are 200 mg per carat. How many kilograms does the Hope Diamond weigh?
A) 0.000890 kg B) 0.00890 kg C) 0.0890 kg D) 0.890 kg E) 8.90 kg