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The maximum induced emf in a generator rotating at 249 rpm is 44 V. How fast must the rotor of the generator rotate if it is to generate a maximum induced emf of 57 V?
A test charge of +2*10^-7 C is located 5cm to the right of a charge +1*10^-6 C and 10 cm to the left of a charge -1*10^-6 C. The three charges lie on a straight line
Calculate momenta before collision of the objects with masses m1=10g and m2=20g, moving with speeds v1=2m/s and v2=7m/s
An electron of mass 9.11×10?31kg leaves one end of a TV picture tube with zero initial speed and travels in a straight line to the accelerating grid, Find the net force. (You can ignore the gravitational force on the electron)
Yusef pushes a chair of mass = 51.0 across a carpeted floor with a force (the subscript 'p' here is lowercase and throughout the question) of magnitude = 170 directed at = 35.0 below the horizontal. The magnitude of the frictional force between the c..
A physics demo launches a ball horizontally while dropping a second ball vertically at exactly the same time. [Delayed Feedback] 1) Which ball hits the ground first?
A relief airplane is delivering a food package to a group of people stranded on a very small island. What is the speed of the package when it hits the ground in mph
A 0.300-kg mass, attached to the end of a 0.750-m string, is whirled around in a smooth level table. If the highest tension that the string can withstand is 250 N, after that what highest linear speed can the mass have if the string is not to brea..
An electric iron connected to a 110V source draws 9A of current.show that the amount of heat generated in one minute is almost 60 kj.
When you irradiate a metal with light of wavelength 435 nm in an investigation of the photoelectric effect, Find the work function of the irradiated metal in electron volts
A 0.500m -diameter vat of liquid is 2.20m deep. The pressure at the bottom of the vat is 1.30atm. What is the mass of the liquid in the vat
Imagine a "free" electron and a "free" proton held midway between the plates of a charged equivalent plate capacitor. When released, how do their accelerations and directions travel compare.
q1. an open-open organ pipe is 67.9 cm long. an open-closed pipe has an essential frequency equal to the third harmonic
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