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The first bright fringe of a diffraction grating of 600 ruling/mm is found at angle of 21 degrees.Find the wavelength of light of the source.
A 94.07 cm-long steel string with a linear density of 1.02 g/m is under 273.01 N tension. find the wavelength of the sound wave that reaches your ear
The 5.35- kg weight that drives the time mechanism of a grandfather clock descends 19 cm in exactly 24 hours. What power is delivered to the mechanism
In an experiment, 210 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 48.0 g of water (4186 J/kg·K) at 20°C, What is the entropy change of the aluminum
The pressure in the fluid at the distance from the axis of rotation is. You may ignore the variation in pressure with depth; suppose that it is much smaller than the variation in pressure with radius.
A technician wearing a circular metal band on his wrist moves his hand into a uniform magnetic field of magnitude 2.2 T in a time of 0.48 s. find the magnitude of the average emf induced in the band
A 2.9cm --diameter parallel-plate capacitor has a 1.6mm spacing. The electric field strength inside the capacitor is 8.0×104 V/m. How much charge is on each plate
A 12- V battery causes a current of 0.40A through a resistor. how may joules of energy does the battery lose
Billy has a bucket that has a mass of 150 g, in which he put 150 g of fresh water. He has tied 150-cm of string to the handle of the bucket.
Meteroids often move at high speeds relative to Earth. If meteroids approach Earth closely enough to hit our atmosphere, find the meteroid's kinetic energy
A plane is headed due west with an air speed of 224 m/s. Find the velocity of the plane relative to the earth
An alien race has evolved such that their eyes work exactly like ours except their eyes can be modeled with a biconcave lens. WHen they come to visit us, what kind of glasses would you prescribe
A potential difference of 14 V is found to produce a current of 0.39 A in a wire of length 3.1 m with a uniform radius of 0.44 cm. What is the resistivity of the wire
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