A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 kg and is under a tension of 2000 N
(a) What is the speed of the wave on the wire?
(b) Find the frequency of this wave.
What will be an ideal response?
(a) 200 m/s (b) 400 Hz
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If a 60 kg person absorbed a dose of 1.7 rem of radiation with a quality factor of 1.1, what was the total energy absorbed in joules?
A. 1.7 B. 1.5 C. 0.93 D. 0.015 E. 0.26
A sphere is constructed of two concentric pieces. The inner part is a solid sphere of radius 10.0 cm made of a material with density 4000 kg/m3. The outer part is a spherical shell with inner radius 10.0 cm and outer radius 20.0 cm
The outer shell has a density 9000 kg/m3. (a) What is the mass of this sphere? (b) What is the average density of this sphere?
Collisions in Two Dimensions: A 1500-kg car traveling at 90 km/h toward the east suddenly collides with a 3000-kg car traveling at 60 km/h toward the south. The two cars stick together after the collision. What is the direction of motion of the cars after collision?
A. 36.9° S of E B. 36.9° E of S C. 53.1° S of E D. 53.1° E of S
As the ideal gas expands from pressure P1 and volume V1 to pressure P2 and volume V2 along the indicated straight line, it is possible that:
a.
the temperature stays constant.
b.
the internal energy decreases.
c.
the gas is changing state.
d.
all of the above are impossible for this particular graph.