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Two baseballs are pitched horizontally from the same height, but at different speeds. The faster ball crosses home plate within the strike zone, but the slower ball is below the batter's knees. Why does the faster ball not fall as far as the slower one?
A wrecking ball (weight = 5680 N) is supported by a boom, which may be assumed to be uniform and has a weight of 2520 N. compute the tension in the support cable
Synchronous communications satellites are located in a circular orbit that is 3.59 x 107 meter above the surface of the earth. Obtain the magnitude of acceleration due to gravity at this distance
A photon with energy 0.50 eV is barely capable of causing a photoelectric effect when it strikes a metal plate. Find the speed of the released electron far from the nucleus
What are memory tricks, and explain in theoretical terms why they work?
Indicate whether the following statements are always true or can be false. If a net force acts on an object, the object's speed will change. If a net force acts on an object, the object's velocity will change.
the air speed of a plane is 320km/h. A wind is blowing fromthe southeast at 129km/h. the piolet wishes to fly directly west. calculate the ground velocity of the plain
A factory worker pushes a 28.6 kg crate a distance of 4.9 m along a level floor at constant velocity by pushing downward at an angle of 32 degrees below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26. How m..
The spheres are given the same electric charge Q and it is found that they come to equilibrium when each string is at an angle of 5 with the vertical. Each string is 30 cm long.
A capacitor that has air between its plates is connected across a potential of 24.0 V and stores 48.0 uC of charge. Find the capacitance of the capacitor
A electron enters a magnetic field of 0.3 T at an angle of 35 degree and with a speed of 5.00 E5 m/s. Find the force on the electron. Describe the path of the electron while in the magnetic field.
A series RL circuit with L = 3.00 H and a series RC circuit with C = 3.00 μF have equal time constants. If the two circuits contain the similar resistance R.
A 515- turn circular loop coil with a diameter of 16.6 cm isinitially aligned so that its plane is perpendicular to the Earth'smagnetic field. In 2.04 ms the coil is rotated 90.0o sothat its plane is parallel to the Earth's magnetic field.
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