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Dorothy is up on her 15.0m by 13.0m 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 35.0m/s, she calls to her Auntie Em for help. Calculate the force on the roof.
A satellite that always look down at the same spot on the earth's surface is called a geosynchronous satellite. Determine the distance of this satellite from the surface of the earth
q1. if the create has a mass of 90 kg and is 1.6 m tall and 0.80 m in depth and width what is the minimum force needed
a scuba diver breathes air from a tank which has a pressure regulator that automatically adjusts the pressure of the
115 g of glass beads, originally at a temperature of 75.0 oC, are added to 85.0 g of ethyl alcohol which is at a temperature of -50.0 oC. find the temperature of the mixture when thermal equilibrium is reached
A coil with internal resistance can be modeled as a resistor and an ideal inductor in series. Assume that the coil has an internal resistance of 1.60 ?, What is the quality factor of the circuit
A pair of parallel plates, forming a capacitor, are connected to a battery. Find the ratio of the final energy stored to the original energy stored
The tune of a string instrument will change if it is heated or cooled because the different materials expand or shrink in different ways, resulting in changes in tensions. Calculate by how much each will shrink
A ball of mass 8 kilogram is suspended by two wires from a horizontal arm, which is attached to a vertical shaft. Evaluate the tension in wire
What are the electric charges of the baryon and antibaryon formed from the following combination of quarks and antiquarks?
If the speed of sound is 343 m/s, obtain the lowest frequency sound that will form a standing wave in a 2 meter long tube with a node at once end and antinodes at the other
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6
When you look down into a swimming pool or lake, are youlikely to underestimate or overestimate its depth? Explain. How does the apparent depth vary with the viewing angle
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