Electron flow is in the direction of conventional current
Indicate whether the statement is true or false
FALSE
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Suppose we suspend a negatively charged ball like a pendulum inside a hollow but completely enclosing metal box. Assume that the ball hangs a few inches from the box’s left vertical face. Imagine that we now bring a very strong positively charged object to a point just to the left of the box’s left face, so that it is only a few inches away from the suspended ball (though the box’s left face is between them). The ball will be deflected
A. strongly toward the external object. B. strongly away from the external object. C. weakly toward the external object. D. weakly away from the external object. E. not the least little bit.
For a longitudinal mechanical wave, the particle motion is
a. parallel to the direction of the wave velocity. b. perpendicular to the direction of the wave velocity. c. both parallel and perpendicular to the direction of the wave velocity. d. in all directions.
A Carnot cycle requires an ideal gas for its "working substance."
Indicate whether the statement is true or false
The very first stars in the universe were made of
A) hydrogen and helium. B) hydrogen and helium, 10% heavy elements. C) hydrogen and helium, 0.1% heavy elements. D) hydrogen and helium, 2% heavy elements.