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A ball is thrown upward from the top of a 45.0 m tall building. The ball's initial speed is 12.0 m/s. At the same instant, a person is running on the ground at a distance of 26.0 m from the building. What must be the average speed of the person if he is to catch the ball at the bottom of the building?
A flat horizontal surface with an area of 505 cm2 is inside a uniform electric field of 1.40×104 N/C. What is the electric flux through the surface
A batter hits a 0.14kg baseball that was approaching him at 30.0 m/s and, accordingly, the ball leaves the bat at 40.0 m/s in the direction of the pitcher. The ball remains in contact with the bat for 2ms. What is the average force exerted by bat.
A circular window with 0.5m radius on a submarine can withstand a maximum pressure of 8900 N/m^2. How deep can the sub safely dive
A +6.4 µC charge is placed at the origin and a -3.3 µC charge is placed at x = 25 cm. At what coordinates can a third charge be placed
In a physics demonstration, two rubber balls are dropped down a tube towards the ground,with the lighter ball behind, How high does the light ball rise after the two collisions
A 2.6-kg 10-cm-radius cylinder, initially at rest, is free to rotate about the axis of the cylinder. Find the magnitude of the torque exerted by the rope
A long wire lying along the x-axis carries a current of 1.60 A in the +x direction. There is the uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along cartesian coordinate axes') in units of Tes..
imagine a truck with a mass of 23 metric tons t 1 t1000 kg barrelling down a highway at a speed of 55 mih. what is the
how much money does it cost to leave a 100 watt light bulb on for 1 hour if electricity sells for 10cents per kW-h. a) 1cent b) 8 cent c) 22 cent d) 44cent e)100 cent
A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.21 m and a mass of 0.005 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor.
the work done by an external force to move a -8.20uc charge from point a to point b is 1.80times10-3j . if the charge
The positively charged plate of a parallel-plate capacitor has a charge equal to Q. When the space between the plates is evacuated of air, What is the dielectric constant of the material
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