Simple Harmonic Motion: The total mechanical energy of a simple harmonic oscillating system is

A. zero as it passes the equilibrium point.
B. zero when it reaches the maximum displacement.
C. a maximum when it passes through the equilibrium point.
D. a minimum when it passes through the equilibrium point.
E. a non-zero constant.


Answer: E

Physics & Space Science

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The fact that we can only calculate probabilities for values of physical quantities in quantum measurements means that

a. radiation and matter are not described by mathematical relations between measurements. b. the probabilities cannot be calculated from mathematical relationships. c. the results of physical measurements bear no relationship to theory. d. the average values of a large number of measurements correspond to the calculated probabilities. e. the average of the values calculated in a large number of different theories corresponds to the results of a measurement.

Physics & Space Science

Which one of the choices below represents the preferred practice regarding significant figures when multiplying the following: 10.5 × 8.9 × 3.11?

a. 290.6295 c. 291 b. 290.63 d. 290

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Which formula is dimensionally consistent with an expression yielding a value for velocity? (a is acceleration, x is distance, and t is time)

a. v/t2 c. v2/t b. vx2 d. at

Physics & Space Science

An electromagnetic wave is propagating towards the west. At a certain moment the direction of the magnetic field vector associated with this wave points vertically up. What is the direction of the electric field vector?

A) Horizontal and pointing south B) Vertical and pointing down C) Horizontal and pointing north D) Vertical and pointing up E) Horizontal and pointing east

Physics & Space Science