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The drawing shows four point charges. The value of q is3.1 μC, and the distance d is 0.89 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity.
What was an initial speed of the ball
A steam turbine operates with 1.6 MPa and 350 degrees C steam at its inlet and saturated vapor at 30 degrees C at its exit. The mass flow rate of the steam is 16 kg/s, and the turbine produces 9000 kW of power. Determine the rate at which heat is los..
Suppose that the voltage of the battery in the circuit is 3.2 V, the magnitude of the magnetic field (directed perpendicularly into the plane of the screen) is 0.65 T, find the maximum speed attained by the rod after the switch is closed
A gold wire 5.72 long and of diameter 0.850 carries a current of 1.19. Find the resistance of this wire
A hospital's linear accelerator produces electron beams for cancer treatment. The accelerator is 1.4m long and the electrons reach a speed of 0.98c.
A diverging lens (f = -12 cm) is located 20 cm to the left of a converging lens (f = 35.0 cm). A 3.00 cm tall object stands to the left of the diverging lens, exactly at its focal point.
The concept of thermionic emission is the basis of modern X-ray tubes, which are the workhorse of a medical X-ray image. How many electrons, ne, has the filament lost
A 117-cm-long, 4.00g string oscillates in its n = 4 mode with a frequency of 200 Hz and a maximum amplitude of 5.50 mm. What is the tension in the string
A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 6.93 103 W. How much energy does it extract from the outside air
In 2.0 minutes, a ski lift raises six skiers at constant speed to a height of 175 m. The average mass of each skier is 65 kg. Illustrate what is the average power provided by the tension in the cable pulling the lift?
An aluminium cup of 180 cm3 capacities is totally filled with glycerin at 18° C. How much glycerin (in cubic cm) would spill out of the cup if temperature of both the cup and glycerin is increased to 33° C? (The linear expansion coefficient of alumin..
At age forty, a man requires contact lenses (f = 58.0 cm) to read a book held 25.0 cm from his eyes. At age forty-five, he finds that while wearing these contacts he must now hold a book 29.0 cm from his eyes.
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