A clown 2 m tall looks at himself in a full-length mirror (floor-to-ceiling). Where in the mirror must he look to see his feet?
a. 1 m from the floor
b. 50 cm from the floor
c. 25 cm from the floor
d. at the bottom of the mirror
e. 1.5 m from the floor
a
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Weight and g: An astronaut goes out for a "space-walk" at a distance above the earth equal to the radius of the earth. What is her acceleration due to gravity at that point?
A. zero
B. g
C. g/2
D. g/4
E. g/
Pseudoscience is best characterized as being
A) new age. B) an alternate view to be taken seriously. C) fake. D) all of the above
Two taut strings of identical mass per unit length are stretched with the same tension with their ends fixed, but one string is 0.330 cm longer than the other. Waves on these strings propagate at 34.0 m/s
The fundamental frequency of the shorter string is 258 Hz. What is the beat frequency when each string is vibrating at its fundamental frequency? A) 12.3 Hz B) 9.00 Hz C) 12.0 Hz D) 12.7 Hz E) 11.3 Hz
The distance between adjacent orbits in a hydrogen atom
A) varies randomly with increasing values of n. B) decreases with increasing values of n. C) remains constant for all values of n. D) increases with increasing values of n.