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A solid piece of an unknown material wights 96.9 N in air and 59.6 N when submerged in water. The density of water is 1000 kg/m3
A) Determine the density of the material?
B) Determine the volume of the material?
An object has a kinetic energy of 257J and a momentum of magnitude 21.8 kg·m/s. Find out the speed and the mass of the object.
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
After being accelerated through a potential difference of 5.42 kV, a singly charged carbon ion (12C) moves in a circle of radius 20.8 cm in the magnetic field of a mass spectrometer. What is the magnitude of the field
The fan blades on a jet engine make one thousand revolutions in a time of 81.8 ms. What is the angular frequency of the blades
An electric motor operates at 6 volts. In order to lift a mass of 1 kilogram a distance of 2 meter in 3 seconds, how much current in amps must the motor draw? (Assume the motor is 100% efficient.)
Air flows through the supersonic nozzle. The inlet conditions are 7 KPa and 420 degree C. The nozzle exit diameter is adjusted such that the exiting velocity is 700m/s. Calculate the exit temperature
A railroad car of mass 2.44 104 kg, is moving with a speed of 3.96 m/s. It collides and couples with three other coupled railroad cars, What is the speed of the four cars after the collision
You are to throw a ball with a speed of 13 m/s at a target that is 4.5 m above the level at which you release the ball. At what angle above the horizontal must you throw the ball
The position of an object connected to a spring varies with time according to the expression x = (4.4 cm) sin(6.9?t). (a) Find the period of this motion.
The acceleration of gravity is 9.81 m/s2 . Assuming that air resistance is simply a constant 93 N force on the person during the fall, evaluate the person’s velocity just before hitting the net.
Two people, A and B, with masses of 50-kg and 60-kg, correspondingly, stand on a frictionless surface 10m apart. B pulls on a connecting rope, giving A an acceleration of 0.92m/s2 towards B. a) what is B's acceleration toward A.
An electronic device dissipating 30 W has a mass of 20g and a specific heat of 850 J/kgoC. The device is lightly used, and it is on for 5 min and then off for several hours, throughout which it cools to the ambient temperature of 25 o C.
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