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Two radio antennas A and B radiate in phase. Antenna B is 160 m to the right of antenna A. Think about point Q along the extension of the line connecting the antennas, a horizontal distance of 55 m to the right of antenna B. The frequency, and hence the wavelength, of the emitted waves can be varied.
1. What is the longest wavelength for which there will be destructive interference at point Q?
2. What is the longest wavelength for which there will be constructive interference at point Q?
A physics book slides off a horizontal tabletop with a speed of 2.70m/s . It strikes the floor in 0.350s. Find the direction of book's velocity, just before the book reaches the floor
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. How many electrons are there in 6.24 liters of water
A playground merry-go-round of radius R = 1.80 meter has a moment of inertia I = 250 kg•m2 and is rotating at 9.0 rev/min about a frictionless vertical axle, Determine the new angular speed of the merry-go-round
You are to build a box whose height is 0.280 times its length. what should be the ratio of the width of the box to its length
a helicopters velocity is given as vt -2t100ms. determine the position and acceleration functions given that x0 9m.
upon what properties of the sound wave do the a loudness b pitch and c quality of a musical note depend? why do the
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the period of a satellite in a geosynchronous orbit
a point charge causes an electric flux of -390nmiddotm2c to pass through a spherical gaussian surface of 25.0 cm radius
A 1.40 kg iron horseshoe is taken from a forge at 950°C and dropped into 4.00 kg of water at 14.0°C. Assuming that no energy is lost by heat to the surroundings, determine the total entropy change of the horseshoe-plus-water system.
A cord of length 1.3 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. (a) What is the frequency of the fundamental oscillation? Hz (b) What tension is required if the n = 3 mode has a frequency of 0.60 kHz? N
A uniform rod rotates in a horizontal plane about a verticalaxis through one end. find the angular momentum of the rod about that axis
A 48dB sound wave strikes an eardrum whose area is 4.2×10?5m^2. How much energy is absorbed by the eardrum per second
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