Both reflecting and refracting telescopes may use a lens called the eyepiece
Indicate whether the statement is true or false
True
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The circuit below contains three 100-watt light bulbs. The emf ? = 110 V. Which light bulb(s) is(are) the brightest?
a.
A
b.
B
c.
C
d.
B and C
e.
All three are equally bright.
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
lifetime of the battery (Neglect the battery’s internal resistance.) 1.increases. 2.decreases. 3.remains the same. 4.Need more information.
Which one of the following properties is unique to water?
A) it has a high heat capacity B) it is a good solvent C) it is a liquid over a wide temperature range D) it expands on freezing
A supersonic plane passes overhead at a speed of 500 m/s. If you hear the sonic boom (shock wave) 4.00 s after the plane is directly overhead, at what altitude is the altitude the plane flying? Assume the speed of sound in air is 340 m/s
A) 1.36 km B) 2.16 km C) 1.85 km D) 2.45 km E) The plane is not flying fast enough to produce a shock wave.