A thin lens of focal length 20 cm is placed in contact with a 40-diopter thin lens. What is the power of the combined lenses?
a. 1/4 diopter
b. 35.0 diopters
c. 45.0 diopters
d. 80 diopters
e. 4 diopters
c
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The force of Earth's gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes
A) half. B) three-quarters. C) one-fourth. D) none of the above
What is the Sun's outermost atmosphere called?
A. the radiative zone B. the photosphere C. the corona D. the chromosphere
4.00 moles of a monatomic ideal gas at a temperature of 340 K are compressed adiabatically from an initial volume of 70.0 L to a final volume of 30.0 L. What is the final pressure in the gas?
A) 663 kPa B) 581 kPa C) 106 kPa D) 42.1 MPa E) 2.17 MPa
The temperature of a rigid cylinder, 15 cm tall and 15 cm in radius, is used to heat its contents, a volume of Xenon (a monatomic gas) which begins at standard temperature (0oC) and pressure (1 atm). If the heat input to the box is 185 J, what is the final temperature of the gas?
a. 
b. 
c. 
d. 
e. 
f. 