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A 42.0-kg boy, riding a 2.29-kg skateboard at a velocity of +5.82 m/s across alevel sidewalk, jumps forward to leap over a wall. Just afterleaving contact with the board, the boy's velocity relative to thesidewalk is 5.40 m/s, 9.90° above the horizontal. Ignore any friction between the skateboard and the sidewalk. What is the skateboard's velocity relative to the sidewalk at this instant? Besure to include the correct algebraic sign with your answer.
Suppose a string of length l under a certain tension has a fundamental frequency of 120 Hz. what is the new fundamental frequency
The automobile afterwards undergoes a uniform acceleration of -4 m/s2 because of a red light and comes to rest. It remains at rest for 54.6s and next accelerates back to a speed of 25.6m/s at a rate of 2.85m/s2.
a gas is confined to a cylinder with a movable piston. a small weight is placed on the piston after which the system
question11 the molecular mass of helium is 4 gmol boltzmannrsquos constant is 1.38066 times 10minus23 jk universal gas
A police car is traveling east at 39.5 m/s along a straight road, overtaking a car ahead of it moving east at 32.0 m/s. What is the wavelength in front of the police car
q1. illustrate the force vectors with their tails at the origin of coordinate system. the orientation of your vectors
You put your morning coffee in a copper mug. Assuming the coffee is boiling hot (100 *C), what is the temperature of the cup of coffee
A long solenoid with 12.8 turns/cm and a radius of 8.91 cm carries a current of 21.9 mA. What is the magnitude of the magnetic field there
an antelope is at a distance of 20.0 m from a converging lens of focal length30.0cm. the lens forms an image of the
A cylindrical wheel (disk) of mass 10 kg andradius 0.5 meters is released from rest while sitting on aninclined plane of inclination 30o.find its velocity when it reaches the bottom of the plane
A previous nuclear accident occurred where a worker received 100J/Kg of gamma radiation. Estimate the dose in rem of the worker
an ambulance with a siren emitting a whine at 1600 hz overtakes and passes a cyclist pedaling a bike at 2.44 ms. after
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