Which of the lens shapes given below results in a diverging lens?
a. plano concave
b. double convex
c. convex meniscus
d. None of the shapes listed will be diverging.
[Ques. 2] Four moles of nitrogen gas are contained in an enclosed cylinder with a movable piston. If the molecular mass of nitrogen is 28 u, how many grams of nitrogen are present?
a. 0.14
c. 42
b. 56
d. 112
[Ques. 3] When an image is inverted compared to the object, it is also:
a. enlarged. c. diminished. b. virtual.
d. reversed left to right.
[Ques. 4] With molar quantity and temperature held constant, by what factor does the pressure of an ideal gas change when the volume is four times bigger?
a. 16
c. 1/4
b. 4
d. 1/16
[Ques. 5] What is the image distance of an object 1.00 m in front of a converging lens of focal length 25.0 cm?
a. +25.0 cm
c. +20.0 cm
b. +33.3 cm
d. +16.7 cm
[Ques. 6] With volume and molar quantity held constant, by what factor does the absolute temperature change for an ideal gas when the pressure is three times bigger?
a. 0.3
c. 5.0
b. 3.0
d. 25.0
[Ques. 7] An object, located 90 cm from a concave lens, forms an image 30 cm from the lens on the same side as the object. What is the focal length of the lens?
a. -150 cm
c. -36 cm
b. -45 cm
d. -180 cm
[Ques. 8] A 4.00-L container holds half a mole of an ideal gas at a pressure of 18.5 atm. What is the gas temperature? (R = 0.0821 L atm/mol K)
a. 1800 K
c. 901 K
b. 1190 K
d. 450 K
[Ques. 9] A projector lens is needed to form an image on a screen 20 times the size of its corresponding object. The screen is located 8.0 m from the lens. What is the required focal length of the lens?
a. 0.32 m
c. 0.73 m
b. 0.38 m
d. 1.25 m
[Ques. 10] An ideal gas is confined to a container with adjustable volume. The number of moles and temperature are constant. By what factor will the volume change if pressure quadruples?
a. 16
c. 1/4
b. 4
d. 1/16
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