A nucleon is either a
A) positron or an electron.
B) proton or an electron.
C) neutron or an electron.
D) proton or a neutron.
Answer: D
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A 2.0-kg block slides on a rough horizontal surface. A force (magnitude P = 4.0 N) acting parallel to the surface is applied to the block. The magnitude of the block's acceleration is 1.2 m/s2 . If P is increased to 5.0 N, determine the magnitude of the block's acceleration
a. 2.1 m/s2 b. 2.3 m/s2 c. 1.9 m/s2 d. 1.7 m/s2 e. 3.2 m/s2
Which has the larger light-gathering power?
a. a telescope of 5 cm diameter and focal length of 50 cm b. a telescope of 6 cm diameter and focal length of 100 cm c. a telescope of 2 cm diameter and focal length of 100 cm d. a telescope of 3 cm diameter and focal length of 75 cm e. both b and c since they have the same focal length.
Elementary Particles: What combination of quarks produces a neutron and what are the electric charges on these quarks, expressed in terms of e?
What will be an ideal response?
Absolute zero is the temperature of
A. frozen water B. the Universe C. liquid helium D. nothing