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A circuit contains six 219 O lamps with 60-W bulbs and a 9.4 O heater connected in parallel. The voltage across the circuit is 126 v. What is the current in the circuit if six lamps and the heater are operating?
A 5.00-nF capacitor charged to 60.0 V and a 7.00-nF capacitor charged to 40.0 V are connected with the negative plate of each connected to the negative plate of the other. What is the final charge on the 7.00-nF capacitor? Would these capacitors be c..
A capacitor has a capacitance of 2.31E-8 F. In the charging process, electrons are removed from one plate and placed on the other plate. When the potential difference between the plates is 500 V, how many electrons have been transferred?
A series circuit with R=100ohms, L=.5H and C=50 MuF is driven by an ac signal of frequency 75 Hz and amplitude of 18V. what are the rms values of the voltage and current
A conical pendulum is formed by attaching a 41.0 g mass to a 1.3 m string. The mass swings around a horizontal circle of radius 32.0 cm. What is the tension in the string
An object is placed to the left of a convex lens and on the optical axis. find the magnification of the image formed by the lense
A 238 kg cast-iron car engine contains water as a coolant. Suppose the engine's tempera- ture is 33C when it is shut off and the air temperature is 8C. What mass of water is used to cool the engine
A large balloon of mass 233 kg is filled with helium gas until its volume is 327 m3. Assume the density of air is 1.29 kg/m3, Calculate the buoyant force acting on the balloon
The cylinder of a bicycle pump has an interior diameter of 2.0 cm and a length of 40 cm. How far down (in cm) must you push the piston before air begins flowing into the tire
A pot of water is boiling under one atmosphere of pressure. Assume that heat enters the pot only through its bottom, What is the temperature of the heating element in contact with the pot
You drive on Interstate 10 from San Antonio to Houston, half the time at 60 km/h and the other half at 105 km/h. On the way back you travel half the distance at 60 km/h and the other half at 105 km/h.
A ball of mass 1.91 kg is dropped from a height y1 = 1.35 m and then bounces back up to a height of y2 = 0.59 m. How much mechanical energy is lost in the bounce
q1. an object hangs from a spring balance. the balance indicates 40 n in air and 30 n when the object is submerged in
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