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A worker drives a 0.500 kg spike into a rail tie by a 2.50kg sledgehammer. The hammer hits the spike with a speed of 65.0m/s. If one-third of the hammer's kinetic energy is converted to the internal energy of the spike and hammer, how much does the total internal energy increase.
An 18-year-old runner can complete a 10.0 km course with an averagespeed of 4.57 m/s. A 50-year-old runnercan cover the same distance with an average speed of 4.42 m/s. How much later (in seconds) should theyounger runner start in order to finish ..
a proton beam that carries a total current of 8.3 ma has 10.0 mm diameter. the current density in the proton beam
Four charges are placed in a three-dimensional space. The charges have magnitudes 2 nC, -4 nC, 1 nC, and -9 nC. If a Gaussian surface encloses all the charges, what will be the electric flux through that surface?
A 1.8 kg solid disk pulley of radius 0.11 m rotates about an axis through its center. What is its moment of inertia
A positive charge Q1 = 3.00 µC is in the origin and a negative charge Q2 = -5.00 µC is at point x = 11m. Find the position of point P between the charges, where the electric potential equals zero.
A 3000-kg spacecraft is in a circularorbit 1200 km above the surfaceof Mars. How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4000 km above the surface?
A empty sphere of radius 0.35 meter, with rotational inertia I = 0.052 kg m2 about a line through its center of mass, Determine what is its total kinetic energy now
Blood is a viscous fluid. If due to plaque, the cross-sectional area of an artery is reduced by a factor 6 over a segment with a length of 0.5 cm, approximately by what factor would the pressure difference between both ends of this segment need to be..
A 6.00 kg block starts from rest and slides down a frictionless surface incline. At what angle above horizontal is the inclined plane titled
Two balls of radius 2.00 mm have a separation between theircenters of 5.33 cm. The same electric charge is placed on bothballs so that there is a repulsive force between them of2.65 N. Assume that the charge is uniformlydistributed over each ball.
A Young's double-slit interference experiment gives bright fringes separated by 30.5 cm on a screen when the experiment is performed in air. What is the new spacing between bright fringes
a horizontal spring is lying on a frictionless surface. one end of the spring is attaches to a wall while the other end
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