If the atmospheric pressure is 15 lb/in2, what is the corresponding downward force on the top of a horizontal square area 5 inches on each side?
A. 75 lbs.
B. Zero
C. 375 lbs.
D. 15 lbs.
Answer: C
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A salt will dissolve in water to form:
a. acids b. gases c. ions d. bases e. polar solvents
In a two-body collision, if the kinetic energy of the system is conserved, then which of the following best describes the momentum after the collision?
a. must be less c. may also be conserved b. must also be conserved d. is doubled in value
In _________, the reinforcing fabric is placed in the mold, and liquid matrix material is injected into the mold under pressure.
Fill in the blank(s) with the appropriate word(s).
A proton with a kinetic energy of 0.20 keV follows a circular path in a region where the magnetic field is uniform and has a magnitude of 60 mT. What is the radius of this path?
a. 4.1 cm b. 2.9 cm c. 3.4 cm d. 5.1 cm e. 2.4 cm