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A rocket fires two engines simultaneously. One produces a thrust of 380 N directly forward, while the other gives a 315 N thrust at 34.2o above the forward direction.
Find the magnitude and direction (relative to the forward direction) of the resultant force that these engines exert on the rocket.
A ballistic pendelum of mass 1kg is struck by a 0.003kg bullet moving at 600 m/s. How high does the pendulum swing
a rocket is flying level at standard sea level conditions and the mach number indicated is .985. calculate the speed of
Iced tea is made by adding ice to 2.4 kg of hot tea, initially at 70?C. How many kg of ice, initially at 0?C, are required to bring the mixture to 10?C? (Lf = 3.33×105 J/kg, cw = 4,186 J/kg•? C)
A 0.500 kilogram football is thrown toward the east with a speed of 10.0 m/s. A stationary receiver catches the ball and brings it to rest in 0.020 second. Find the average force exerted on the receiver
A generator driven by a diesel engine that develops 12 hp delivers 28 A at 240 V. What is the efficiency of the generator
A fighter plane is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.3 x105 Newton. Calculate the work done on the plane by the catapult
An electron is in a certain energy state in a one-dimensional, infinite potential well from x = 0 to x = L = 125 pm. What is the change in the electron's energy
1 two parallel long wires carry the same current and repel each other with a force f.per unit length. if both these
A small ball with a mass of 49.0g and a charge of ?0.170?C is suspended from the ceiling by a string. What is the tension in the string when the second ball is directly beneath the first ball
A family ice show is held in an enclosed arena. The skaters perform to music playing at a level of 87.5 dB. What is the combined sound level
An airplane whose air speed is 608 is supposed to fly in a straight path 38 north of east. But a steady 86 wind is blowing from the north. In what direction must the plane head.
A 7.0 centimeter diameter horizontal pipe gradually narrows to 5.6 centimeter. Evaluate what is the volume rate of flow
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