Atmospheric pressure is approximately
A) 1.01 × 102 Pa
B) 1.01 × 103 Pa
C) 1.01 × 104 Pa
D) 1.01 × 105 Pa
E) 1.01 × 106 Pa
D
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The objective and the eyepiece of a microscope have focal lengths of 4.00 mm and 25.0 mm, respectively. The objective produces a real image 30 times the size of the object
The final image is viewed at infinity, and the near point of the microscope user is at 25.0 cm. What is the distance between the object and the focal point of the objective? A) 0.13 mm B) 0.18 mm C) 0.23 mm D) 0.28 mm E) 0.33 mm
The light that comes from a ruby laser has a wavelength of 694.3 nm.
(a) What is the color of the laser light? (b) What is the energy of a photon from a ruby laser in air in joules and in electron volts?
Which of the following stars will certainly end its life in a supernova?
A) the Sun B) a red giant star C) a 10-solar-mass star D) a neutron star
The density of copper at 
and its linear expansion coefficient is 
Consider a hot cube of copper that is 1.0cm on a side when its temperature is 1356 K. What is the cube’s mass?
A. 8.80 g B. 8.46 g C. 8.78 g D. 8.38 g E. 8.94 g