In which type of collision is the most kinetic energy lost?
A. A perfectly elastic collision
B. A perfectly inelastic collision
C. A partially inelastic collision
D. Kinetic energy is always conserved
B. A perfectly inelastic collision
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A person's face is 30 cm in front of a concave shaving mirror. If the image is an erect image 1.5 times as large as the object, what is the mirror's focal length?
A) 20 cm B) 30 cm C) 50 cm D) 70 cm E) 90 cm
A flat coil has a maximum flux 
through it as its area is perpendicular to a uniform magnetic field. When the coil is rotated 60 
(so that its normal makes a 60
angle with the field), what is the flux through it?
A. 
B. 
C. 
D. 
E. 
When a fixed amount of ideal gas goes through an isothermal expansion
A) its internal (thermal) energy does not change. B) the gas does no work. C) no heat enters or leaves the gas. D) its temperature must decrease. E) its pressure must increase.
It is July and you are in your hometown. As you travel northward toward the north pole, how does the number of daylight hours vary? How does the number of daylight hours vary as you travel southward toward the south pole?