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It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s . A 65kg passenger gets aboard on the ground floor.
1) What is the passenger's weight before the elevator starts moving?
2) What is the passenger's weight while the elevator is speeding up?
3) What is the passenger's weight after the elevator reaches its cruising speed?
An AC voltage of the form ?V = (85 V) sin (330 t) is applied to a series RLC circuit. If R = 42 ?, C = 29 µF, and L = 0.3 H, find the rms current in the circuit
A 2 kg rock is released from rest at a height of 29 m. neglect air resistance and determine the kinetic energy, gravitational potential energy, and total mechanical energy at each of the following heights: 20m; 15m; 5m; 9m.
Take the largest image distance and calculate the focal length of the lens used. image distance = 226 mm object distance =100 mm focal length = ??? How do you find the focal length
Electrons are accelerated through a voltage difference of 265 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
Compare the gravitational lens to the one found in a telescope.
An exoplanet of mass 7.4e26 kg orbits its parent star at an angle of inclination of 28.9 degrees. determine the period of the exoplanet in days
There is a +10 nC charge inside a cube of size 5 cm. What additional charge must be placed into the cube
Two parallel plates are 6.0 cm apart. The bottom plate is charged positively and the top plate is charged negatively, What is the time required for an electron
A particle with a mass of 6.64*10^-27kg and a charge of 3.20*10^-19Cis accelerated from rest through a potential difference of 2.45*10^6V. calculate the radius of the path inside the magnetic field
You are on the Turkish Twist, an amusement park ride with your back against the wall of a spinning vertical cylinder of radius 4.0 m, What is the minimum number of revolutions per minute necessary to prevent you from sliding down the wall
What is the direction of the object's acceleration after it is free. What is the magnitude of the objects acceleration.
Two spheres are launched horizontally from a 1.1m-high table. Sphere A is launched with an initial speed of 4.5 m/s. What is the time for the sphere A to hit the floor
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