Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it really is. Assume a cylindrical bottle with an inner radius of 1.0 cm and an outer radius of 2.0 cm. What percentage of the apparent volume is the real volume?
a. 95%
b. 60%
c. 80%
d. 64%
e. 75%
d
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Stellar nucleosynthesis is responsible for the existence of all elements except hydrogen
Indicate whether the statement is true or false
When you drag a toy teddy bear along the floor by a force that is parallel to the floor, the magnitude of the force of friction
A. is independent of velocity or acceleration. B. increases when the velocity increases. C. is proportional to the acceleration. D. decreases when the force parallel to the floor increases. E. increases when the force parallel to the floor increases.
An ideal spring has a spring constant (force constant) of 60 N/m. How much energy does it store when it is stretched by 1.0 cm?
A) 0.30 J B) 60 J C) 0.0030 J D) 600 J
Two speakers in an automobile emit sound waves that are in phase at the speakers. One speaker is 40 cm ahead of and 30 cm to the left of the driver's left ear. The other speaker is 50 cm ahead of and 120 cm to the right of the driver's right ear. Which of the following wavelengths is(are) in phase at the left ear for the speaker on the left and the right ear for the speaker on the right?
A. 10 cm B. 20 cm C. 650 cm D. All of the wavelengths listed above. E. Only the wavelengths listed in (a) and (b).