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torresalysabeth
02.03.2020 •
Physics
What happens to the brightness of bulb A? View Available Hint(s) What happens to the brightness of bulb A? It gets dimmer. It gets brighter. There is no change.
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Ответ:
Answer / Explanation:
The question is incomplete. It can be found in search engines. However, kindly find the complete question below.
The light bulbs in the circuit diagram as shown below are identical. What happens to the brightness of bulb A when the switch is closed?
a) both bulbs go out
b) the intensity of both bulbs increases
c) the intensity of both bulbs decreases
d) nothing changes
Before switch closed: Va = 12V because of battery. Vb = 12 because equal resistance divides 24V in half. After switch closed: Nothing changes since (a) and (b) are still at same potential
Therefore, the answer is (D), nothing changes. That is, there is no change.
Ответ:
The angle near the y-axis is 60°, beause 90°-30°=60°. Vy=10m/s*sin60°=8.66m/s