A 2.00 kg mass is connected to a spring with a spring constant of 900 N/m. The displacement is given by the expression x(t) = 12.0 cm sin
What is the frequency of the simple harmonic motion?
A. 5.02 Hz
B. 4.21 Hz
C. 3.38 Hz
D. 2.56 Hz
E. 2.05 Hz
C. 3.38 Hz
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Which of the following has the highest frequency?
a) Ultraviolet b) Microwaves c) X-rays d) Radiowaves
The maximum mass of a white dwarf is ________
A) limitless; there is no theoretical limit to the maximum mass of a white dwarf B) about the mass of our Sun C) about 1.4 times the mass of our Sun D) about 3 times the mass of our Sun
Two converging lenses, the first with focal length 25 cm and the second with focal length 20 cm, are separated by 30 cm. A 4.0 cm tall object is placed 50 cm in front of the first lens. Where is the final image?
A. 20 cm after the second lens B. 20 cm before the second lens C. 10 cm after the second lens D. 10 cm before the second lens E. 50 cm after the second lens
The Observable Universe: How does the age of the universe (estimated at 14 billion years) introduce the concept of the "observable universe?" Suppose you feel, as do many astronomers, that the universe is much larger than the observable universe
Do you think there is any way to obtain direct evidence for this larger universe?