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A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 9:24. When used with 120 V (rms) household service, the transformer draws an rms current of 175 mA. Find the power delivered to the CD player?
A 16.0-m uniform ladder weighing 490 N rests against a frictionless wall. Find the horizontal and vertical forces the ground exerts on the base of the ladder
An engine goes through the following cycle with 2.20 sample of a diatomic gas. I. an isothermas expansion from point a to point b. II. a constant pressure compression from point b to point c. III.
A small block having mass m sits on a uniform disk that has radius R=0.5m. What is the initial angular velocity of the disk
An extremely large nonconducting sheet creates equipotential surfaces, which are planes. What is the surface charge density on the sheet
If water at 15°C is flowing through a 3cm diameter pipe with a velocity of 50 cm-1, calculate the Reynolds number. Is the flow turbulent or laminar?
Old naval ships fired 13 kg cannon balls from a 210 kg cannon. It was very important to stop the recoil of the cannon, since otherwise the heavy cannon would go careening across the deck of the ship.
What mass of water (at 4.0 C) can be contained in a rectangular box whose dimensions are 10 cm by 5.00 cm by 1.00 cm? The density of water at 4C is 1.000 X 10 kg/m-cubed.
Two radio waves are used in the operation of a cellular telephone. To receive a call, the phone detects the wave emitted at one frequency by the transmitter station or base unit. determine the difference between the two frequencies used in the oper..
An object moves up and down y-axis with an acceleration given as a function of time t by the expression a = A sin ω t, where A and ω are constants. What is the period of this motion.
A railroad car of mass 3.3 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
A square loop of Cu wire 4.00cm on an edge is lying on a horizontal table. An electromagnet above the square loop is turned on to produce a magnetic field. what is the power loos in the loop
A defibrillator consists of a 16.7-µF capacitor that is charged to 9.0 kV. (a) If the capacitor is discharged in 2.0 ms, how much charge passes through the body tissues? C (b) What is the average power delivered to the tissues?
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