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The drawing shows two long, straight wires that are suspended from a ceiling. The mass per unit length of each wire is 0.047 kg/m. Each of the four strings suspending the wires has a length of L = 1.4 m. When the wires carry identical currents in opposite directions, the angle between the strings holding the two wires is ? = 14°. What is the current in each wire?
A photon has an energy equal to the kinetic energy of an electron with speed, u, which may be close to the speed of light, c. Calculate the ratio of the wavelength of the photon to the wavelength of the electron
write down Newton's Second Law for the velocity of the cube.
three uniform thin rods, each of length L = 39 cm, form an inverted U. The vertical rods each have a mass of 15 g; the horizontal rod has a mass of 32 g. Elucidate what are (a) the x coordinate and (b) the y coordinate of the system's center of ma..
An individual is nearsighted; his near point is 16.0 cm and his far point is 47.0 cm. What lens power is needed to correct his nearsightedness
A defibrillator consists of a 15.3-µF capacitor that is charged to 8.4 kV. What is the average power delivered to the tissues
A proton accelerates from rest in a uniform electric field of 675 N/C. At some later time, its speed is 1.35 106 m/s. (a) Find the magnitude of the acceleration of the proton.
In order to calculate th number of ways of arranging a given amount of energy in a tiny block of copper, How many atoms are in the copper block
Four Identical masses of 500.0g are placed at the corners of a square, distance 0.50 m apart. Find the magnitude of net gravitational force exerted by three masses
About 1350 W/m2 of electromagnetic energy reaches the upper atmosphere of the earth from the sun, which is 1.5 × 1011 m away. estimate the average power output of the sun
An airplane traveling at 480 km/h needs to reverse its course. The pilot decides to accomplish this by banking the wings at an angle of 38o. Find the time needed to reverse course
What is fraction of the diameter of the Sun
A sample of an unknown substance appears to weigh 15.1 N in air and 9.18 N when immersed in a solvent with density 0.945 g/mL. Find the density of the sample
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