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A soccer ball is kicked from the ground with an initial speed of 20.1 m/s at an upward angle of 45.4?. A player 50.1 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground? Neglect air resistance.
A sample of an unknown material appears to weigh 290 N in air and 155 N when immersed in alcohol of specific gravity 0.700. What is the volume of the material
A model airplane of mass 0.870 kg is flying at constant speed in a horizontal circle at one end of a 28.0 m cord and at a height of 17.0 m. What is the acceleration of the plane
0.60mol of argon gas is admitted to an evacuated 70cm3 container at 10 ?C. The gas then undergoes an isochoric heating to a temperature of 500 ?C. compute the final pressure of the gas
A ray of light is incident normally on the right face of a 30o-60o-90o cubic zirconium prism, Determine the exit angle theta for the ray of light
Two motorcycles are traveling due east with different velocities. However, four seconds later, they have the same velocity. During this four-second interval, Which motorcycle was moving faster
What is the speed of the wave and draw a snapshot graph of this wave at t = 0 s.
Two events in regerence frame S occur 10 microseconds apart at the same point in space. What is the distance between the events in frame S'
If John Glenn weighed 640 N on Earth's surface, a) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from centre of Earth? b) Why is it said that an astronaut is never truly "weightles".
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 550 m to be the other plate. How much charge can the cloud hold before the dielectric strength of the air is e..
A positive charge moves in a region where the magnetic field is uniform, has a magnitude of 60 uT and points in the positive x direction. what is the radius of the resulting path
A 35-kg child rides a playground merry-go-round, standing 1.6 m from its center. What was the distance travelled by the child during this time
A 82kg person sits on a 3.7kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3cm in diameter. Find the pressure exerted on the floor by each leg of the chair
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