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A heat engine has a maximum possible efficiency of 0.800. If it operates between a deep lake with a constant temperature of 287.0 k and a hot reservoir, what is the temperature of the hot reservoir?
The speed of a bullet as it travels down the barrel of a rifle toward the opening is given by v = (-5.30 107) t 2 + (3.15 105) t, where v is in meters per second and t is in seconds.
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
A child goes down a playground slide with an acceleration of 1.20 m/s2. Compute the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 32.2° below the horizontal.
A 0.36-kg object connected to a light spring with a force constant of 24.4 N/m oscillates on a frictionless horizontal surface. Determine the maximum speed of the object
An airplane must reach a speed of 189mi/h to take off. If the runway is 472m long, what is the minimum value of acceleration that will allow the airplane to take off successfully.
An electron travels with speed 1.0*10^7 m/s between two parallel charged plates. The plates are separated by 1.0 cm, What is the direction of the magnetic field
Calculate Escape Velocity for Mars (mass = 6.42 x 1023 kg, radius = 3397km). Is it easier to launch a rocket from Mars than the Earth
A loudspeaker of mass 20.00 {rm kg} is suspended the distance of h = 2.40 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.50 {rm m}.
Compute the heat absorbed by the gas and work done by the gas during expansion.
The Pulse frequency of a person is 90 beats/min, Find the power of heart if the density of mercury is 13.6 X 10^3 kg/m^3 (g=10 m/s^2)
In a popular amusement park ride, a rotating cylinder of radius 4.00 m is set in rotation at an angular velocity of 6.00 rad/s. The floor then drops away, leaving the riders suspended against the wall in a vertical position.
A mass of 1 kg is hung vertically from a spring stretching the spring .20 m. It is then pulled .10 m below its equilibrium position, find the time to make one complete cycle
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