The four fundamental forces that operate in the universe today are
A) strong force, weak force, electromagnetic force, gravity.
B) strong force, weak force, electric force, magnetic force.
C) nuclear force, electromagnetic force, gravity, tidal force.
D) nuclear force, gravity, electric force, magnetic force.
A
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Vector V1 is (5i + 7j - 3k) and V2 = (7i + 2j + 14k). The vector product of these two vectors is:
(A) -104i + 72j - 39k (B) -124i + 62j - 33k (C) 104i - 91j - 39k (D) -114i - 12j + 91k
On the earth, the period of a pendulum clock is 1.0 s. On a spaceship traveling at 0.8c, the period of the same clock is :
A. less than 1.0 s B. equal to 1.0 s C. greater than 1.0 s
As minerals crystallize in cooling magma, are the minerals with lower amounts of silica or the minerals with higher amounts of silica the first to crystallize?
What will be an ideal response?
A particle is in the ground state of a one-dimensional box of length 1.0 m. What is the minimum value of its momentum (in kg × m/s)?
a. 9.9 × 10^-34 b. 6.6 × 10^-34 c. 3.3 × 10^-34 d. 13 × 10^-34 e. cannot be solved unless mass of particle is known.