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The rms current in a copy machine is 7.27 A, and the resistance of the machine is 16.6?. What are (a) the average power and (b) the peak power delivered to the machine?
Two point charges lie on the x-axis. A charge of +9.4 µC is at the origin, and a charge of -4.4 µC is at x = 10.0 cm. (a) At what position x would a third charge q3 be in equilibrium? Th
A gas cylinder holds 0.100g of at 180 degrees cand a pressure of 3.50atm. The gas expands adiabatically until the volume is doubled. What is the final pessure.
As you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 88.7 Hz. At what speed are you driving?
A flat circle of radius 20 is placed in a uniform electric field of magnitude 6.5×102. What is the electric flux through the circle when its face is at 60 degrees to the field lines?
Calculate the vertical component of the baseball's velocity at each of the two times you found in part A? What is the magnitude of the baseball's velocity when it returns to the level at which it le
A 50dB sound wave strikes an eardrum whose area is 5.6 x 10-5 m2. How much energy is absorbed by the eardrum per second? Take the threshold of hearing to be Io = 10-12 W/ m2 and give your answer in pi
A piano string having a mass per unit length equal to 4.80 10-3 kg/m is under a tension of 1,400 N. Find the speed with which a wave travels on this string.
What should his speed have been at the top of the ramp to have just made it to the edge of the far bank?
Oxygen has a molar mass of 32.0. The root mean square of an oxygen molecule at 294K= 479 m/s. What is its average translational kinetic energy at that speed?
An electron is released from rest at the point midway between the two charges, and it moves along the line connecting the two charges. What is the speed vfinal of the electron when it is 10.0cm from
The total electric flux from a cubical box 3.00cm on a side is 1.40×103N\cdot m^2/C. What charge is enclosed by the box?
Which of the following describes the qualitative behavior of the Maxwell-Boltzmann distribution as temperature increases? You will have to press the "reset" button on the applet before you can chang
The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3, and the latent heat of fusion of water is 3.35 x 105 J/kg.
A golf ball rolls off a horizontal cliff with an initial speed of 11.4 m/s. The ball falls a vertical distance of 15.5 m into a lake below. (a) How much time does the ball spend in the air?
What is the maximum thickness of ice above this area that the defroster can melt in 3.2 minutes?
Determine the half-angle of the wedge and the ratios of stagnation pressure and stagnation temperature across the wave.
When the resistors are connected in parallel to the battery, the total current from the battery is 9.66 A. Determine the two resistances.
a.) Find the flare's maximum height if it is fired on the level salt flats of Utah.
A charge of 2.95 µC is uniformly distributed on a ring of radius 8.5 cm. Find the electric field strength on the axis at the following locations.
Calculate the magnetic force on one of these poles, 6.09 m long, when it transmits an upward current of 2.16 x 104 A during a lightning discharge.
A singly charged 7Li ion has a mass of 1.16 10-26 kg. It is accelerated through a potential difference of 504 V and subsequently enters a uniform magnetic field of magnitude 0.398 T perpendicular to
A box full of books rests on a wooden floor. The normal force the floor exerts on the box is 235 N. (a) You push horizontally on the box with a force of 124 N, but it refuses to budge. What can you
Which describes the electric potential and the electric field at a point due to a negatively charged particle?