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A wire is 1.4 m long and 1.3 mm2 in cross-sectional area. It carries a current of 5.8 A when a 2.4 V potential difference is applied between its ends. Calculate the conductivity of the material of which this wire is made.
A 67 kg person sits on a 3.5kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.8 cm in diam. Determine the pressure exerted on the floor by each leg of the chair; Assume the weight is evenly distributed.
Two traveling sinusoidal waves are described by the wave functions, What is the amplitude of the resultant wave, What is the frequency of the resultant wave
A 2.40 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats.
Two resistors A and B are 60,000 and 40,000 (omega sign) respectively and are in series across a constant power supply of 100V. What amount of current is flowing in each of the 3 resistors
A tennis ball gun launches tennis balls at 17.6 m/s . It's pointed straight up and launches one ball; 2.0 s later, it launches a second ball. I already found - At what time (after the first launch) are the two balls at the same height? = 2.8s What..
An 18 g rifle bullet travelling 210 m/s buries itself in a 3.6 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of pendulum's displacement.
A small object with a momentum of magnitude 5.0 kg m/s approaches head on a large object at rest, what is the magnitude of the small objects momentum change in kg m/s
What is the advantage of the new crumple zone design in new car's today when they are in a car crash, explain answer from a physics standpoint?
A canoe has a velocity of 0.54m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.52m/s east relative to earth.
An electrical motor can accelerate a ferris wheel whose moment of inertia is 20,000 kg-m^2 from rest to 10 rev/min in 12 sec. When the motor is turned off, the ferris wheel slows down from 10 to 8 rev/min in 10 sec due to frictional losses.
How to compute Average power output
In a certain time period a coil of wire is rotated from one orientation to another regarding a uniform 0.38-T magnetic field. The emf induced in the coil is 3.5 V. Other things being equal, what will the induced emf be if the field had a magnitude..
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