The atomic number of a given element is equivalent to which of the following?
a. neutron number in the nucleus
b. sum of the protons and neutrons in the nucleus
c. proton number in the nucleus
d. number of electrons in the outer shells
C
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A block is on a frictionless horizontal table, on earth. This block accelerates at 3.6 m/ when a horizontal force is applied to it. The block and table are then set up on the moon where the acceleration due to gravity is 1.62 m/
A horizontal force of 45 N is applied to the block when it is on the moon. What acceleration does this force impart to the block? A) 1.8 m/ B) 1.6 m/ C) 2.0 m/ D) 2.2 m/ E) 2.3 m/
A non-conducting sphere of radius R = 7.0 cm carries a charge Q = 4.0 mC distributed uniformly throughout its volume
At what distance, measured from the center of the sphere, does the electric field reach a value equal to half its maximum value? A) 3.5 cm only B) 4.9 cm only C) 3.5 cm and 9.9 cm D) 3.5 cm and 4.9 cm E) 9.9 cm only
The first scientist to be credited for postulating that Earth circled the Sun was
A) Aristotle. B) Copernicus. C) Galileo. D) Newton.
Around us in the galactic plane, we find stars of a variety of ages and compositions
Indicate whether the statement is true or false