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A baseball pitcher throws a 44 m/s fastball. The baseball bat reverses the ball's velocity and it leaves the bat at 56 m/s. What was the average force on the 0.145 kg baseball through the contact time of 15 ms?
markings to indicate length are placed on a steel tape in a room that is at a temperature of 22degc. measurements are
Water flows through a 2.7cm -diameter pipe at 2.1m/s. If the pipe narrows to 1.7cm diameter, what is the flow speed in the constriction
A radio station broadcasts at a frequency of 600,000 Hz. Know that radio waves have a speed of 3.00 x 10^8m/s, what is wavelength of these waves.
a boeing 747-8 with wingspan of 65.5 m is cruising at 289 m/s over northern canada, What is the potential difference between the tips of the wings
a capacitor is charged to a potential of 12.0v and is then connected to a voltmeter having an internal resistance of
When an x-ray photon with wavelength = 0.070nm strikes an electron at rest, What is the maximum angle through which it may be scattered
In SI units, the electric field in an electromagnetic wave is described by Ey = 100 sin(107x - ?t ). What is the frequency of the EM wave
A beetle 4.50 mm long is examined with a simple magnifier of focal length = 11.7 cm. what is the apparent length of the beetle
You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 188kg, and you require to exert a force of 347N to make it just begin to move. What is the coefficient of static friction between floor and refrigera..
A mover's dolly is used to deliver a refriger- ator up a ramp into a house. What gravitational potential energy is gained by the refrigerator
A proton (mp=1.67x10-27 kg, qp=+e=1.6x10-19 C) and an alpha particle (m=6.64x10-27 kg, q=+2e=2x1.6x10-19 C) are initially at rest and separated by a distance of ri=4.0x10-15 m and they are both released simultaneously.
Kim has a far point of 29 cm. If she wants to use glasses of power -3.99 D to correct her vision. How far from her eyes should the glasses be put
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