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If you throw a ball upward with an initial speed of 4 m/s at 1.5 m above the ground find
1) the flying time for this free fall motion
2) the final velocity just before touching the ground and
3) the maximum height with respect to the ground.
A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. find the distance (in m) between the cliffs
A fireman d = 46.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of θi = 38.0°, at what height will the stream of water strike the building
Theoretically where on a rollercoaster should you feel the heaviest? Use the concept of inertia. Where do you actually feel the heaviest
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
A heater coil connected to a 220V ac line has a resistance of 42.1Ohm. What is the average power used, What is the maximum value of the instantaneous power
A 10 N book is placed on a table. a) What is the mass of the book? b) If 20 N of force is needed to keep the book moving at constant velocity, what is the books acceleration
The weins displacement law tells us that when an object is heated to incandesence it will If the nail seems to give off a maximum of light in the 630 nm region
A toy car with a mass of 120 g moves to the right with a speed of 0.62 m/s. A small child drops a 21.0-g piece of clay onto the car, What is the change in speed of the car
What is the difference in blood pressure ({rm mm-Hg}) between the top of the head and bottom of the feet of a 1.80-{rm m}-tall person standing vertically.
The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two d..
A 85-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.4 cm in diameter
A proton accelerates from rest in a uniform electric field of 675 N/C. At some later time, its speed is 1.35 106 m/s. (a) Find the magnitude of the acceleration of the proton.
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