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A flight attendant wants to change the temperature of the air in the cabin from 18.0° C to 24.0° C without changing the number of moles of air for each m3. What fractional change in pressure would be necessary?
A simple pendulum in a science museum entry hall is 3.51m long, has a 1.25kg bob at its lower end, and swings with an amplitude of 10.50 degrees. How much time does the pendulum take to swing from its extreme right side to its acute left side.
An 8m, 290 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can a 720 N person climb before the lad..
U235 (92 protons/143 neutrons) absorbs a neutron and fissionsinto Krypton (36 protons/56 neutrons) and Barium (56 protons/85neutrons) plus 3 neutrons; plus a bunch of energy. Determine the loss of mass (m) and if E=m*c*c (where c=speed oflight), th..
at the end of the shock wave roller coaster ride the 6000kg train of cars including passengers is slowed from a speed
while walking between gates at an airport you notice a child running along a moving walkway. estimating that the child
Two resistors, 50.0 ? and 52.0 ?, are connected in parallel. The current through the second resistor is 2.10 A. What is the total power supplied to the two resistors
A 270 mL soda can is 5.27 cm in diameter and has a mass of 23.4 g. Such a soda can half full of water is floating upright in water. What length of the can is above the water level
a block of mass 0.246 kg is placed on top of a light vertical spring of force constant 5 125 nm and pushed downward so
A ten pound car wheel has a moment of inertia of 0.38 kg m2. While rotating at a constant speed the wheel makes 35.64 revolutions in 5.5 s
What is the gravitational force of the moon on the earth and What is the gravitational force of the sun on the earth
A trains whistle is a pipe thats open at only one end is emitting a sound at its second overtone. What is the length of the whistle in centimeters
A 67.5 kg circus performer slides4.10 m down a pole to the circusfloor, starting from rest. What is the kinetic energy of the performer as shereaches the floor
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