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3.a) Consider two speakers along the y axis a distance 2 wavelengths apart emitting 680 Hz frequency in phase. Calculate where along the x axis will one find intensity minima.
b) The sun produces its power from the conversion of mass into energy by Einstein's equation E=mc2 where c=3x10^8 mls. the sun's intensity on the earth is 1346W/m^2 and the distance to the sum is about 1.5x10^11m. Calculate the rate at which mass is being converted to energy in the sun.
An uncharged capacitor and a resistor are connected in series to a source of EMF. If ? = 4.38 V, C = 20.1 ?F, and R = 111 ?, Calculate the maximum charge on the capacitor
A boat has a mass of 6800 kg. Its engines generate a drive force of 4000 N, find the magnitude and direction of the boat's acceleration
An 80 g, 35 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 g ball of clay travelling horizontally at 2.50 m/s hits and sticks to the very bottom tip of the rod.
The image of a very distant car is located 25 cm behind a convex mirror. What is the radius of curvature of the mirror
Two identical metallic blocks are connected by a light spring having the spring constant 100 N/m and an unstretched length of .30 m. A total charge Q is slowly placed on the system, causing the spring to stretch to an equilibrium length of .40 m. ..
An archeological specimen containing 8.7 g of carbon has an activity of 1.8 Bq. How old (in years) is the specimen
Two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 N. If one person applies an upward force equivalent to 60 N at one end, at what point does the other person lift . If the tangential acceleration of a yo-yo at the en..
A thundercloud similar to the one described in Example 24.3 produces a lightning bolt that strikes a radio tower. find the effective resistance of the air during the lightning strike
Two objects attract each other gravitationally with a force of 3.1×10?10N when they are 0.45m apart. One of the object has a mass of 2.0kg. Find the mass of the other object
how to estimate the initial temperature of the hot horseshoe.
A 94 cm is pulled aside a small distance and released. After 120 oscillations the amplitude is one-half of its starting value. What is the value of the damping coefficient
On one of the shelves in your physics lab is displayed an antique telescope. A sign underneath the instrument says that the telescope has a magnification of 20, what is the focal length fe of the eyepiece
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