Suppose you are observing a binary star with a telescope and are having difficulty resolving the two stars. You decide to use a colored filter to help you. Should you choose a blue filter or a red filter?
1.blue filter
2.red filter
3.neither because colored filters have no effect on resolution
1
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A parallel plate capacitor of capacitance C0 has plates of area A with separation d between them. When it is connected to a battery of voltage V0, it has charge of magnitude Q0 on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them
After the plates are 2d apart, the magnitude of the charge on the plates and the potential difference between them are what?
a.
b.
Q0, 
V0
c.
Q0, V0
d.
Q0, 2V0
e.
2Q0, 2V0
If no net external force acts on a system, the total momentum of the system is a conserved quantity
Indicate whether the statement is true or false
Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, the
individual currents in the lightbulbs (neglect the battery’s internal resistance) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
Would switching your home from incandescent to compact fluorescent bulbs be a measure you would take? Why or why not? Explain your answer
What will be an ideal response?