The eyepiece of a compound microscope has a focal length of 2.50 cm and the objective has a focal length of 1.60 cm
The two lenses are separated by 15.0 cm. The microscope is used by a person with normal eyes (near point at 25 cm). What is the angular magnification of the microscope?
A) 78 x
B) 94 x
C) 195 x
D) 234 x
E) 125 x
A
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Venus is the planet closest to Earth in mass
a. True b. False Indicate whether the statement is true or false
Jupiter's "striped" appearance is a result of
A) alternating bands of rising and falling air at different latitudes. B) alternating bands of liquid and gaseous material at different latitudes. C) changes in the atmospheric composition with latitude. D) changes in the strength of Jupiter's magnetic field with latitude.
A proton moving with a velocity of 4.0 × 104 m/s enters a magnetic field of 0.20 T. If the angle between the velocity of the proton and the direction of the magnetic field is 60°,
what is the magnitude of the magnetic force on the proton? (e = 1.60 × 10-19 C) A) 1.8 × 10-15 N B) 0.60 × 10-15 N C) 1.1 × 10-15 N D) 2.2 × 10-15 N E) 3.3 × 10-15 N
A Ferris wheel with a radius of 8.00 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
A) 589 N B) 568 N C) 615 N D) 325 N E) 432 N