A pressure of 10.0 mm Hg is measured at the triple-point of water using a constant-volume gas thermometer. What will the pressure be (in mm Hg) at 50.0°C?
a. 68.3
b. 1.80
c. 31.8
d. 11.8
e. 8.50
d
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A machinist needs to remove a tight fitting pin of material A from a hole in a block made of material B. The machinist heats both the pin and the block to the same high temperature and removes the pin easily
What statement relates the coefficient of thermal expansion of material A to that of material B? A) Material B has a greater coefficient of expansion than does material A. B) The situation is not possible because heating block B will shrink the hole in the material as the material expands with increasing temperature. C) Material B has the same coefficient of expansion as does material A. D) Material A has a greater coefficient of expansion than does material B.
A car starts out when the air temperature is 288 K. The air pressure in the tires is 500 kPa. After driving a while, the temperature of the air in the tires increases to 298 K
What is the pressure in the tires at that point, assuming the volume remains constant? A) 129 kPa B) 483 kPa C) 507 kPa D) 517 kPa E) 532 kPa
The image formed by a single concave lens
A) is always real. B) is always virtual. C) could be real or virtual, depending on whether the object distance is smaller or greater than the focal length. D) could be real or virtual, but is always real when the object is placed at the focal point. E) is always inverted.
Describe the image formed by a convex lens when the object is closer to the lens than its focal length