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A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.20 s later. You might ignore air resistance. If the height of the building is 20.1 m, what should the initial speed be of the first ball if both are to hit the ground at the same time?
A closely wound rectangular coil of 50 turns has dimensions of 12.0 cm by 25. 0 cm. The plane of the coil is rotated from a position where it makes an angle of 45.0 degrees by a magnetic field of 2T to a position perpendicular to the field. The rotat..
an 80 mm segment of wire is at an angle of 53 degrees south of a westward 2.3-t b field. what is the magnitude of the
A square wire 2.0 cm on each side is oriented so that a 5.00 mT magnetic field makes a 30.0 degree angle with the normal to the plane of the square. how many loops does the wire make
A salt shaker sits on a wheel that is turning at 20 rpm (revolutions per minute). If the wheel's diameter is 46 centimeter, determine the acceleration of the salt shaker
A uniform solid sphere of radius R = 0.50 m and a mass 15 kgrotates about the z-axis through its center. Find its angular momentum when the angular velocity is 3 radians/second
A 145 gram baseball is dropped from a tree 14.0 meter above the ground. If it hits the ground with a speed of 8.00 m/s, obtain the average force of air resistance exerted on it
A projectile is launched straight up at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45 degrees above the horizontal plane. How fast is it moving at the top of its curved trajectory and what is the ..
Water flowing through a 3.0cm -diameter pipe can fill a 200L bathtub in 3.3min. calculate the speed of the water in the pipe
A light plane attains an airspeed of 480 km/h. The pilot sets out for a destination 830 km due north but discovers that the plane must be headed 24.0° east of due north to fly there directly
Find the rms voltage across each element in an RLC circuit with R = 9.9k? , C = 0.14?F , and L = 27mH
a hydrogen atom in a state having a binding energy the energy required to remove an electron of 0.378 ev makes a
A simple Atwood’s machine uses a massless pulley and two masses m1 and m2. Starting from rest, the speed of the two masses is 8.4 m/s at the end of 7.2 s. At that time, the kinetic energy of the system is 62 J and each mass has moved a distance of 30..
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