If a star is twice as hot as the sun and only half the sun's diameter, it will be less luminous than the sun
Indicate whether the statement is true or false
F
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Mars, Jupiter, Saturn, and Venus are the Jovian planets.
a. true b. false
A single slit of width a is illuminated by light of wavelength ?. If a = 4.3?, the maximum number of dark fringes on a semi-circular screen surrounding the slit is
a. 2. b. 4. c. 6. d. 8. e. 9.
Which of the following cannot occur?
A) ?+ ? ?+ + v? B) ?° ? 2? C) ?+ + p ? K+ + ?+ D) ?- + p ? n + ? E) ?- ? ?- + p
A baseball is thrown by the center fielder (from shoulder level) to home plate where it is caught (on the fly at an equal shoulder level) by the catcher. At what point is the ball's speed at a minimum? Note: Air resistance is negligible
a. just after leaving the center fielder's hand b. just before arriving at the catcher's mitt c. at the top of the trajectory d. speed is constant during entire trajectory