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in order to stop a 1500kg car that is originally moving at 25m/s, and if the car stops over a distance of 50m, what average force must act on the car?
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 5.9 cm behind the mirror. How is the image oriented relative to the object
A motorcycle and a police car are moving in the same direction, with the motorcycle in the lead. What frequency does the motorcyclist hear
two point charges are seperated by 10.0 cm and have charges of +2.00uc, What is the electrical field at a point between the two charges
A 750 g aluminum pan is removed from the stove and plunged into a sink filled with 10.0 liters of water at 20.0 ° C. What was the original temperature of the pan
A 21.5-g bullet is fired from a rifle. It takes 2.15 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 620 m/s. find the average net force exerted on the bullet
A 0.287-kg particle undergoes simple harmonic motion along the horizontal x-axis between the points x1= -0.269 m and x2= 0.473 m. find the total mechanical energy of particle
A rescue helicopter lifts a 84.2-kg person straight up by means of a cable. The person has an upward acceleration of 0.759 m/s2, What is the tension in the cable
A balsa-wood raft has the following dimensions: L=2.34m , W= 1.35m , H= 0.65m. if the mass of an average person is 72.5kg, how many people can the raft safely support
A spring is attached to the bottom of an empty swimming pool, Determine the percentage of the block's total volume that is hollow
Two point charges are on the y-axis. A 5.0 µC charge is located at y = 1.05 cm, and a -2.42 µC charge is located at y = -1.30 cm. Find the total electric potential at the origin
At 2500K hydrogen gas (H2) adds two more degrees of freedom to its motion. It has three translation motions, two rotational motions, What would be its kinetic energy per molecule
A 65 kg man in a 5.9 kg chair tilts back so that all his weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area of radius 0.9 cm.
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