If 3 different conservative forces and one non-conservative force act within a system, how many potential energy terms appear in the energy equation that describes the system?

1.0
2.1
3.3
4.4


3

Physics & Space Science

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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. The direction of the electric field vector of this wave is

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

An astronaut has landed on Planet N-40 and conducts an experiment to determine the free fall acceleration on that planet

She uses a simple pendulum that is 0.640 m long and measures that 10 complete oscillations 26.0 s. What is the free fall acceleration on Planet N-40? A) 4.85 m/s2 B) 1.66 m/s2 C) 3.74 m/s2 D) 2.39 m/s2 E) 9.81 m/s2

Physics & Space Science

Instructions: On occasion, the notation will be a shorthand notation for .

A vector,, when added to the vector   yields a resultant vector which is in the positive y direction and has a magnitude equal to that of . What is the magnitude of ? A. 3.2 B. 6.3 C. 9.5 D. 18 E. 5

Physics & Space Science

The current through a 50. ? resistor is I = 0.80 sin (240. t) amperes

(a) At what frequency does the current vary? (b) How much power is dissipated in the resistor?

Physics & Space Science