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In a tornado or hurricane, a roof may tear away from the house because of a difference in pressure between the air inside and the air outside. Suppose that air is blowing across the top of a 1550 ft2 roof at 147 mph. What is the magnitude of the force on the roof?
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
A dump truck, with a mass of 2030 kg, moves at a constant speed 2.23 m/s along a horizontal track. What is the truck's speed after the loading is completed
A parallel-plate air capacitor is made by using two plates 19 cm square, spaced 3.5 mm apart. It is connected to a 3-V battery. What is the electric field between the plates
A 1051 kg coasts down a hill 40 m high with its engine off and the driver's foot pressing the brake pedal. How much energy was converted into heat on the way down
Two polarizers are oriented at 30.0 degrees to one another. Light polarized at a 15.0 degree angle to each polarizer passes through both
how long does it take to reach the new equilibrium position.
Three electric charges QA= q, QB = -q, and QC = -2q are located at the points, what is the value of the electric potential at the origin
An AC generator supplies an rms voltage of 110 V at 60.0 Hz. It is connected in series with a 0.750 H inductor, a 5.50 ?F capacitor, What is the rms current through the resistor
charge 1 is equal to 6.0x10^-9 C, and is located at (0.30,0) meters on xy coordinates. What is the direction the net force on the 5.0 nC charge
A helium-neon laser (?=633 nm) illuminates a diffraction grating. What is the spacing between slits of the grating
Calculate the ratio of the number of HBr molecules in state
A sound wave of frequency 171 Hz has an intensity of 3.29 ?W/m2. What is the amplitude of the air oscillations caused by this wave
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