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An object is made of glass and has the shape of a cube 0.13 meter on a side, according to an observer at rest relative to it. However, an observer moving at high speed parallel to one of the object's edges and knowing that the object's mass is 2.5 kilogram finds its density to be 8200 kg/m3, which is much greater than the density of glass. Find the moving observer speed relative to the cube?
an attack helicopter is equipped with a 20mm cannon tat fires 112 g shells in the foward derection with a muzzle speed
An object is thrown upward with a speed of 14 m/s on the surface of planet X where the acceleration due to gravity is 3.5 m/s2
Bicyclists in the Tour de France reach speeds of 31.0 miles per hour (mi/h) on flat sections of theroad. What is this speed in meters per second
Dipole in a Field An electric dipole, consistingof charges of magnitude 4.40 nC separatedby 7.80 µm, is in an electric fieldof strength 1200 N/C. What is the magnitude of the electricdipole moment?
find out the initial velocity of the ball. How fast will the electron be moving when it is very far away.
the train passes point a with a speed of 30 ms and begins to decrease its speed at a constant rate of at -0.25 ms2.
Two air-track gliders of eual mass are initially moving in the same direction along a straight line, what are the speeds and directions of the gliders after the collision
The pilot of an aircraft wishes to fly due west in a 33.10 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190 km/h what must its speed relative to the ground be.
A bat emits a sound whose frequency is 70.9 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 40.4 oC, find the wavelength of the sound
An automobile engine is initially rotating at 200 rad/sec. It is then turned off and takes 3.0 second to come to a complete stop. Find what is the angular acceleration of the engine
A proton is released in a uniform electric field and it experiencesan electric force of 3.75x10^-14 N toward the South. What are themagnitude and direction of the electric field?
An elevator has mass 550kg , not including passengers. The elevator is designed to ascend, at constant speed, What is the maximum number of passengers that can ride in the elevator
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