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Three resistors, 25, 45, and 75 Ohms, are connected in series, and a 0.51-A current passes through them. What is (a) the equivalent resistance and (b) the potential difference across the three resistors?
Consider the 30N weight held by two cables shown below. The left-hand cable is horizontal. What is the tension in the cable slanted
a nonconducting plate with infinite dimensions carries a uniform surface charge density of 9.1 microccm2. what is the
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown.
When a tuning fork of frequency 500 Hz is held above a tube, resonances are found when the water level is at distances 16.0, 50.5, 85.0, and 119.5 cm from the top of the tube. (a) Find the speed of sound in air.
A ball of m1 is held slightly above ball of mass m2. The two balls are droped simultaneously, falling distance h vertically from rest. Calculate the height to which the first ball rebounds
Water is flowing in a pipe as depicted in the figure. As shown, p = 107 kPa, d = 4.61 cm, d' = 3.38 cm, v = 4.50 m/s, and h = 1.31 m. What pressure is indicated on the upper pressure gauge
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
At a pressure of 1 atm, the heat of vaporization of water is 22,260,000 J/kg; use the first law of thermodynamiics to calculate the heat of vaporization of water at 25 celcius
a small immersion heater can be used in a car to heat a cup of water for coffee or tea. assume the manufacturers claim
Two photons have different frequencies f1 and f2 . If the ratio of their momenta is 22.5, what is the ratio of their frequencies
A cylindrical copper cable carries a current of 1090 A. There is a potential difference of 1.60 10-2 V between two points on the cable that are 0.28 m apart
A college student is working on her physics homework in her dorm room. Her room contains a total of gas molecules. As she works, her body is converting chemical energy into thermal energy at a rate of 125 . If her dorm room were an isolated system (d..
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