Consider a collision where an object with a known mass and known speed collides with another object at rest. The objects are free to move in three dimensions. How many quantities suffice to completely determine the system’s final state (that is, the outgoing objects’ velocities and their combined change in internal energy)?
A. Zero
B. One
C. Two
D. Three
E. Four
E. Four
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A transverse periodic wave is represented by the equation y(z, t) = 2.0 cm sin(1,200 rad/s t - 20.0
z). Another transverse wave is represented by the equation y(z, t) = 2.0 cm sin(1,200 rad/s t - 20.0
z). What is the equation that represents the superposition of the two waves?
A. y(z, t) = 4.0 cm sin(1,200 rad/s t - 20.0
z)
B. y(x, t) = 4.0 cm sin(1,200 rad/s t) cos20.0x)
C. y(x, t) = +4.0 cm cos(1,200 rad/s) sin(20.0 x)
D. y(x, t) = +4.0 cm cos(1,200 rad/s) + (20.0x)
A fish weighing 16 N is weighed using two spring scales, each of negligible weight, as shown in the figure. What will be the readings of the scales?
A) The bottom scale will read 16 N, and the top scale will read zero. B) Each scale will read 16 N. C) The top scale will read 16 N, and the bottom scale will read zero. D) The scales will have different readings, but the sum of the two readings will be 16 N. E) Each scale will read 8 N.
When weight is applied to the top of a stone arch, the stone blocks in the arch undergo
A) tension. B) compression. C) expansion. D) none of the above
Two bodies of equal mass m collide and stick together. The quantities that always have equal magnitude for both masses during the collision are
A. their changes in momentum. B. the force each exerts on the other. C. their changes in kinetic energy. D. all of the above. E. only (a) and (b) above.