Series/Parallel Circuits: Identical ideal batteries are connected in different arrangements to the same light bulb, as shown in the figure. For which arrangement will the bulb shine the brightest?
A. A
B. B
C. C
Answer: C
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Inside the same room, buoyant force is greater on
A) a helium-filled party balloon. B) an elephant. C) both the same
Two experiments are performed. In (A), an 18.0 N force pushes horizontally on a 2.00 kg block that then pushes on a 4.00 kg block. In (B), an 18.0 N force pushes on a 4.00 kg block that then pushes on a 2.00 kg block. Which statement is correct?
a. The acceleration is 3.00 m/s2 in both (A) and (B). b. The acceleration is 4.50 m/s2 in both (A) and (B). c. The acceleration is 6.00 m/s2 in both (A) and (B). d. The acceleration is 9.00 m/s2 in both (A) and (B). e. The 2.00 kg block has a 9.00 m/s2 acceleration. The 4.00 kg block has a 4.50 m/s2 acceleration.
A bimetallic strip is usable as a thermometer because of
a. heat conduction b. heat convection c. heat radiation d. thermal expansion e. none of the above
Molecular Bonds: Van der Waals bonding is due to
A. the sharing of electrons between atoms. B. the transfer of electrons between atoms. C. unequal charge distribution around neutral molecules. D. atoms bonding to hydrogen molecules.