A spaceship is moving in a straight line away from Earth at 0.80c, measured relative to Earth
It launches a missile that moves away from the spaceship in the forward direction at 0.60c, relative to the ship. Relative to Earth, what is the speed of this missile?
A) 1.4 c B) greater than c but less than 1.4c
C) greater than 0.80c but less than c D) c
C
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All real engines are less efficient than the Carnot engine because
a. they do not operate through the Otto cycle. b. they do not operate through a reversible cycle. c. the working substance does not maintain a constant volume through the cycle. d. the working substance does not maintain a constant pressure through the cycle. e. the working substance does not maintain a constant temperature through the cycle.
An 10.0-W resistor is dissipating 100 watts. What are the current through it and the difference of potential across it?
a. 31.6 A, 3.16 V c. 3.16 A, 31.6 V b. 10.0 A, 3.16 V d. 3.16 A, 10.0 V
Dielectrics: A 12.6-µF isolated capacitor is constructed with Teflon, having a dielectric constant of 2.1, between the plates. The capacitor is initially charged to 1.5 volts, and then the Teflon is removed.(a) How much excess charge was originally stored on the plates of the capacitor?(b) After removing the Teflon, what is the potential difference across the capacitor plates?
Fill in the blank(s) with the appropriate word(s).
Projectile Motion: For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A. remains zero. B. remains a non-zero constant. C. continuously increases. D. continuously decreases. E. first decreases and then increases.