A uniform 120-lb beam is supported in a horizontal position by a pin and cable as shown in the figure. What is the magnitude of the force by the pin on the beam?
a.
94 lb
b.
88 lb
c.
63 lb
d.
75 lb
e.
150 lb
d
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Increasing the separation of the two charged parallel plates of a capacitor, which are disconnected from a battery, will produce what effect on the capacitor?
a. increase charge c. decrease capacitance b. decrease charge d. increase capacitance
The larger variation in brightness in an eclipsing system consisting of a white dwarf and an M3 main-sequence star occurs when the white dwarf passes behind the M3 star
a. True b. False Indicate whether the statement is true or false
Which of the following protogalactic clouds is most likely to form an elliptical galaxy?
A) a very low-density cloud with very little angular momentum B) a dense cloud with very little angular momentum C) a low-density cloud with quite a bit of angular momentum D) a very massive cloud with any density and a lot of angular momentum
Which is larger, a liter or a quart?