A mass of 4.0 kg, resting on a horizontal, frictionless surface, is attached on the right to a horizontal spring with spring constant 30 N/m and on the left to a horizontal spring with spring constant 50 N/m. If this system is moved from equilibrium, what is the effective spring constant?
a. 16 N/m
c. 20 N/m
b. 80 N/m
d. -20 N/m
B
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In the above model of an atom, where is the neutron located, assuming a neutron is present?
a. A
b. 1
c. 2
d. 3
The force of gravity between two objects:
A) increases with the masses of the bodies, but decreases with their separations. B) increases with the masses of the bodies, but decreases with the square of the distances between them. C) increases with the square of their masses, but decreases with the cube of their periods of orbit about the Sun. D) depends on the density, not the mass of the bodies. E) depends on the temperature, density, and size of the bodies.
In Einstein's General Theory of Relativity, higher dimensions beyond the three that we can comprehend are called
A) hidden space B) hyperspace C) excited space D) extra space
A light year is defined as the distance light can travel at 3 × 10^8 m/s in one year (365 days). How far is one light year in kilometers? Enter your answer accurate to two decimal places in scientific notation