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The power brick for the author's laptop computer has a power rating of 90 W. It uses a step-down transformer to convert the AC voltage from a wall socket (Vrms = 120 V) to a value near 12 V.
(a) What is the rms current in the input coil of the transformer?
________A
(b) What is the rms current in the output coil of the transformer?
q1. a force does 150 j of work when it acts on a moving object and its direction is in the identical direction as the
Two atomic clocks are carefully synchronized. One remains in New York, and the other is loaded on an airliner that travels at an average speed of 250m/s, Which clock will show the shorter elapsed time
A horizontal force, F1= 75N, ad a force, F2=15.4N acting at an angle of theta to the horizontal, are applied to a block of mass m= 2.9kg, what is normal force
Assume that a CCD pixel is a uniformly made cube of silicon. The relation between pixel size and full well capacity is roughly true for real CCDs. Discuss what applications might require a CCD with large pixels and with small pixels.
If the human aorta has a cross-sectional area of 2.5 cm2 and the flow speed of blood in the aorta is 30 cm/s while the density of blood is 1.05 g/cm3. Calculate the mass flow rate of blood (in g/s) in the aorta
A 4.4-nF parallel plate capacitor with a sheet of Mylar (? = 3.1) filling the space between the plates is charged to a potential difference of 180 V and is then disconnected. (The initial capacitance including the dielectric is 4.4 nF.)
A 1300kg sports car accelerates from 0m/s to 26m/s in 13s. What is the average power of the engine?
The planet Mercury takes only 88 Earth days to orbit the Sun. Assume the motion is uniform in a nearly circular orbit, with a radius of 5.79*10^10m. What is Mercury's tangential velocity
he resolving power of a microscope depends on the wavelength used. what minimum kinetic energy is required for the electrons
A planet of mass 6 × 1024 kg is at location ‹ -3 × 1011, 8 × 1011, 0 › m. A star of mass 9 × 1030 kg is at location ‹ 7 × 1011, -5 × 1011, 0 › m. What is the force exerted on the planet by the star? (It will probably be helpful to draw a diagr..
A nail projects 25.0 mm horizontally outward from a wall. A 400 N picture is hung from the end of the nail and the nail deflects downward by 2.00 x 10^-5. what is the diameter of the nail
Two equal volumes designated 1 and 2, each of which contains a quantity of a classical monatomic gas at the same temperature, establish a relationship between the chemical potentials µ1 and µ2
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