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Dorothy is up on her 11.0m by 14.0m 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 42.5m/s, she calls to her Auntie Em for help. Calculate the force on the roof.
6.00g of nitrogen gas at 22.0 degree celsius and an initial pressure of 4.00atm undergo an isobaric expansion until the volume has tripled, What amount of heat energy is transferred from the gas as its pressure decreases
Three 100 ? resistors are connected as shown in the figure. The maximum power that can safely be delivered to any one resistor is 21.5 W. find the total power delivered to the combination of resistors
A 0.55kg bullfrog is sitting at rest on a level log. How large is the normal force of the log on the bullfrog
A boat floating in fresh water displaces water weighing 33.0 kN. What is the weight of the water that this boat displaces
question a car is moving on a at horizontal circular track of radius 120 m. the speed of the car is constant 15ms . the
A motorcycle moves in a flat circular path of radius R on a surface with a coefficient of kenetic friction of 0.25 and a coefficient of static friction of 0.35. How long does it take to complete one full circle
A particle of mass m is in an infinite square well of width L. determine the allowed energies for the system
What is the rms current in a series RC circuit if = 3.2 kOhm, C = 0.8 microfarads (uF) , and the rms applied voltage is 130V at 79Hz? What is the power dissipated by the circuit
At a certain instant in time, in an electromagnetic wave, the electric field vector points to the north and the magnetic field vector points vertically downward.
It is believed that a large electric fish known as Torpedo occidentalis uses electricity to shock its victims, What is the total amount of work done during one pulse
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 0.321 mH and the capacitor has a value of 22.4 pF. Calculate the frequency of the radio station
What is the root-mean-square speed of chlorine gas molecules at a temperature of 320 K? (R = 8.31 J/mol×K, NA = 6.02 ¥ 1023, and the molecular mass of Cl2 = 71)
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