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A ball is launched into the air at an angle of 60° above the horizontal with a speed of 21.0 m/s. (a) What are the x- and y- components of the velocity of the ball 3.20s after it leaves the cannon? (b) What are the x- and y- components of the displacement of the arrow during the 3.20s interval?
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9four times per week. how much more food energy should he consume daily in order to maintain constant weight
If there are two point along the x-axis, positive q to the right and -q to the left of the orgin. Both with the distance a/2 from the orgin, Find the electric field at that point without using derivatives
Find the buoyant force for the two objects when they are placed into water, Next, find the percent difference between the two buoyant forces
A superball with a mass m = 61.6 g is dropped from a height h = 2.24 m. What is the momentum change of the ball during its collision with the floor
you are designing a delivery ramp for crates containing exercise equipment. the crates of weight 1480 n will move with
The jumping squirrel. A squirrel wants to jump from a point A on a branch of a tree to a point B on another branch. The horizontal distance from A to B is x = 5 ft, and the vertical distance is y = 4 ft. If the squirrel jumps with an initial speed..
An inspector wants a mirror that produces an upright image with magnification of 7.5 when it is located 14.0 mm from machine part. What kind of mirror would do this job
A parallel-plate capacitor has 3.95 cm2 plates that are separated by 4.29 mm with air between them. If a 11.2 V battery is connected to this capacitor, how much energy does it store? The value of the permittivity of a vacuum is 8.8542 × 10 ^?12 C^..
The ems of an AC circuit has an rms value of 120V. What is the maximum positive emf
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
looking straight downward into a rain puddle whose surface is covered with a thin film of gasoline you notice a
A 1,220-kg car traveling initially with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,500-kg truck moving in the same direction at 20.0 m/s, how much mechanical energy is lost after the collision
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