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It takes the elevator in a skyscraper 3 s to reach its cruising speed of 8.08 m/s. A 78 kg passenger gets abord on the ground floor.
What is the passenger's weight before the elevator starts moving?
What is the passenger's weight while the elevator is speeding up?
What is the passenger's weight after the elevator reaches its cruising speed?
A plane drops a hamper of medical supplies from a height of 5460 m during a practice run over the ocean. What is the magnitude of the overall velocity of the hamper
Compute the mass of a ball and speed of a puck after collision.
A concave mirror has a radius of curvature of 34.8 cm. What is the height of the image of the insect
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
It takes 2.80 s for a small ball with a mass of 0.060 kg released from rest from a tall building to reach the ground. Calculate the height from which the ball is released
A fun-loving 10.6 kg otter slides up a hill and then back down to the same place, how much mechanical energy did she lose on the hill
a cooling fan is turned off when it is running at 900revmin . it turns 800 revolutions before it comes to a stop. what
The length of a simple pendulum is 0.70 m and the mass of the particle (the "bob") at the end of the cable is 0.24 kg. Using the position of the bob at its lowest point as the reference level, determine the total mechanical energy of the pendulum as..
A 20 liter tank of helium is at a pressure of 190 kPa at a temperature of 0 C. What is the speed of the helium atoms in the tank at this new volume
A Styrofoam cup holding 90 g of hot water at 95°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temperature of the room.
The current in a coil drops from 3.4 A to 2.8 A in 0.51 s. If the average emf induced in the coil is 12 mV, what is the self-inductance of the coil
A veterans' group wishes to honor General MacArthur by putting a statue of him on a pedestal of Douglas fir. What is the maximum mass of the statue before the pedestal suffers a compressive failure
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