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1) Two identical capacitors are connected
(a) in series with a resistor and a battery and
(b) in parallel first and then in series with the same resistor and battery. Find the ratio of the time constants to charge up the capacitors between circuits (a) and (b).
2) Two capacitors (C1=1.00 ?F and C2=2.00 ?F) are charged with Q1=3.00 ?C on the positive plate of capacitor 1 and Q2=3.00 ?C on the positive plate of capacitor 2. Now if the positive plates are connected with each other and negative plates are connected with each other, what is
(a) the final potential difference across each capacitor and
(b) the total charge on the positive plate of capacitor 1?
3) A copper cable hung on two power poles that are 121 m apart carries a current of 211 A. If the potential difference between the two ends of the cable is 0.400 V, what is the weight of the cable? The resistivity and density of copper are 1.72× 10?8 ?m and 8.92× 103 kg/m3, respectively.
A 950-kg car traveling west at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. Find the speed of the wreckage just after the collision
What is the friction force that acts on the firefighter?
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
A stunt man whose mass is 70 kg swings from the end of a 4.40-m long rope along the arc of a vertical circle. Assuming that he starts from rest as rope is horizontal, find out the tensions in the rope that are required to make him follow his circu..
An electron is then fired directly toward the center of the shell, from point P at distance r from the center of the shell (r >> R). What initial speed v0 is needed for the electron to just reach the shell before reversing direction.
assume you are standing on a train, both feet together, facing a window. The front of the train is to your left. The train starts moving forward.
A 110 ball and a 250 ball are related by a 38--long, massless, rigid rod. The balls rotate about their center of mass at 150 what is the speed of the 110 ball.
What is the total displacement and the angle of displacement
When these two wires are connected in equivalent to the same battery, describe the reasoning of the steps that allow you to find out which of these wires will consume the greater amount of power by warming up and dissipating this energy as heat.
In a die-casting operation 0.1 kg charges of molten zinc alloy at 410 degrees C are injected at a rate of 120 charges per hour. Calculate the average die temperature after a die-casting operation
A 25 kg trunk strikes the ground with a speed of 12.5m/s. if no energy is lost from air resistance, what is the height from which trunk fell.
Two adjacent sources each emit a frequency of 800Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved as a result an observer in front of the sources would hear no sound.
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