Heavy-water molecules have a mass number of
A) 18.
B) 3.
C) 12.
D) 10.
E) 20.
E
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Which of the following devices make use of the photoelectric effect?
a. digital cameras b. photocopiers c. laser printers d. solar cells e. all of the above
The focal lengths of the objective and the eyepiece in a microscope are 0.290 cm and 2.50 cm, respectively
An object is placed 0.300 cm from the objective. The image of this object is viewed with the eyepiece adjusted for minimum eyestrain (image at the far point of the eye) for a person with normal vision. What is the distance between the objective and the eyepiece? A) 11.2 cm B) 11.5 cm C) 9.85 cm D) 10.4 cm E) 10.1 cm
What is the gauge pressure if the absolute pressure is 300 kPa?
A) 97 kPa B) 101 kPa C) 199 kPa D) 150 kPa E) 300 kPa
A satellite is in a circular orbit 600 km above the Earth's surface. The acceleration of gravity is 8.21 m/s2 at this altitude. The radius of the Earth is 6 400 km. Determine the speed of the satellite, and the time to complete one orbit around the Earth