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Dorothy is up on her 16.0m by 15.0m roof enjoying the view of Kansas. Suddenly, a strong wind blows down her ladder, leaving her stranded. She knows that a high wind reduces the air pressure on the roof, and that there is a danger that the atmospheric pressure inside the house will blow the roof off. As the wind reaches a speed of 37.5m/s, she calls to her Auntie Em for help. Calculate the force on the roof.
A capacitor has a surface charge density of 5 micro-coulombs/m2. What is the amount of the electrical force on the point charge
Consider a circuit. The three resistors are identical with R1 = R2 = R3= 160 ?, and the battery voltage is 50 V. What is the current through resistor R2?
Calculate the force on an airplane which has acquired a net charge of 1450?C and moves with a speed of 150m/s perpendicular to the Earth's magnetic field
A pulsed carbon dioxide laser has an energy output of 1.00 J. This energy is released in the form of a 10^9 W pulse of infrared radiation lasting 10^-9 s, Find the equivalent capacitance of the network
A guitar string has a tension on it of 6500 N and length of 1.2 m. what is the linear mass density of the string
A 0.54-kg particle has a speed of 2.0 m/s at point A and kinetic energy of 7.5 J at point B. What is its speed at point b
A speedboat moves on a lake with initial velocity vector v1,x = 8.21 m/s and v1,y = -2.95 m/s, What are the components of the speedboat\'s final velocity, Find the speedboat's final speed
An airplane whose air speed is 628km/h is supposed to fly in a straight path 33.0? north of east. But a steady 88km/h wind is blowing from the north. In what direction should the plane head
A sinusoidal wave traveling on a string has a period of 0.21s, a wavelength of 32cm, and an amplitude of 5.0cm. compute the speed of this wave
A 13.8-g piece of Styrofoam carries a net charge of -0.72 µC and is suspended in equilibrium above the center of a large, determine the charge per unit area on the plastic sheet
A 65kg, 1.70m tall person is standing in a room, Find the air temperature at which the heat transfer rate by radiation is just balanced by the rate of heat generation
An airplane flies 200 km due west from city A to city B and then 300 km in the direction of 30 degrees North of West from city B to city C. In straight-line distance, how far is city C from city A.
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