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A cannon fires a cannonball from the top of a wall at a speed of 91.05 m/s and an angle of 31.18 degrees from the horizontal. A cannonball that was accidentally dropped from the top of the castle hits the water below in 2.25 s. What is the horizontal distance from the wall where the fired cannonball hits the ground?
If it takes 2.25 minutes to heat water in a 250 gm copper kettle from 20 °C to 85 °C, using a 700 W burner, how much water must be in the kettle
A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 14rpm in 9.8s, What force is required at the edge
The wavelength of the waves in seawater is 4.80 x10-4 m. While the generator is directed downward, an echo reflected from the ocean floor is received 10s later.
q1. two balls are rolled off a tabletop that is 0.88 m above the floor. ball a has a horizontal velocity of 5.0 ms and
q1. a force does 150 j of work when it acts on a moving object and its direction is in the identical direction as the
Find the wavelength of the scattered photon when the scattered electron has its maximum kinetic energy
A car is travelling at a constant speed of 32m/s on a highway. At the instant this car passes an entrance ramp, a second car enters the highway from ramp.
A mass of 1.7kg stretches a vertical spring 0.313 m. If the spring is stretched an additional 0.13m and released, how long does it take to reach (new) equilibrium position again.
A 380-kg sailboat has an acceleration of 0.636 m/s2 at an angle of 65.5 ° north of east. Find the direction of the net force that acts on the sailboat
A ball of mass m=0.5 kg and radius r=0.02m is pushed against a spring of force constant 200N/m, What is the speed of the rolling ball when it leaves the spring
A spherically spreading EM wave comes from a 1200 W source. What is the rms value of the electric field
q1. an aluminium block of mass m1 3 kg and a copper block of mass m2 8 kg are connected by a light string over a
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