A convex spherical mirror with a focal length of magnitude 25 cm has a 4.0-cm tall flower placed 100 cm in front of it. What is the height of the image of the flower?
A) 0.80 cm
B) 20 cm
C) 4.0 cm
D) 1.6 cm
E) 8.0 cm
A
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The theory of matter waves was first developed by
a) Heisenberg b) Einstein c) Schrödinger d) de Broglie
It takes 6400 years for one gram of radium to decay away to only 1/16—one-sixteenth—of a gram. The half-life of radium is
A) not possible to determine from this information. B) 1600 years. C) 400 years. D) 3200 years. E) 800 years.
What is the length of the shortest pipe closed on one end and open at the other end that will have a fundamental frequency of 0.060 kHz on a day when the speed of sound is 340 m/s?
A) 1.24 m B) 1.42 m C) 2.14 m D) 4.12 m
Velocity: A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)
A. 9.46 × 1012 mi B. 9.46 × 1015 mi C. 5.88 × 1012 mi D. 5.88 × 1015 mi