Name the four known fundamental forces in nature
What will be an ideal response?
gravitation, electromagnetic, strong (nuclear), weak
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How many nodes and antinodes are shown in the standing wave above?
a. two nodes and three antinodes b. one node and two antinodes c. one-third node and one antinode d. three nodes and two antinodes
Suppose that a Ferrari and a Porsche begin a race with a moving start, and each moves with constant speed. One lap of the track is 2 km. The Ferrari laps the Porsche after the Porsche has completed 9 laps
If the speed of the Ferrari had been 10 km/h less, the Porsche would have traveled 18 laps before being overtaken. What were the speeds of the two cars?
A capacitor is attached across a battery and charged. Then the battery is removed leaving the capacitor charged. The positive lead of the capacitor is then connected to one lead of a previously uncharged identical capacitor, and then the other lead of the charged capacitor is connected to the other lead of the second capacitor. How does the energy Eo stored in the originally charged capacitor
compare to the energy Ef stored in the connected capacitors? a. Eo < Ef b. Eo = Ef c. Eo = 2Ef d. Eo = 4Ef
An initially uncharged 10-?F capacitor is charged by a 10-V battery through a resistance R. The capacitor reaches a potential difference of 4 V in a period of 3 s after the charging began. Find the value of R.
What will be an ideal response?