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A very light cart holding a 300-N box is moved at constant velocity across a 15m level surface. What is the net work done in the process?
A 2.0 kg mass and a 3.0 kg mass are attached to a lightweight frictionless pulley. The masses are free to move. Find the acceleration of the smaller mass
Heat is extracted from a certain quantity of steam at 100 degrees celsius. Thus the steam changes into ice at 0 degrees celsius. If this energy were used to accelerate the ice from rest, what would be the linear speed of the ice.
A string 2.0 m long is held fixed at both ends. If a sharp blow is applied to the string at its center, What are the lowest three standing wave frequencies for this string
two polarizers are oriented at 46 degrees to each other and a polarized light is incident on them. if only 12 percent
A slender rod with a length of 0.300m rotates with an angular speed of 8.80rad/s about an axis through one end and perpendicular to the rod. What is the induced emf in the rod
Two strings equal in length and made of the same material are subjected to tensions
A life preserver made of Styrofoam is designed to support a person weighing 575 N, Find the volume of Styrofoam required if the body's volume is 0.0503 m^3
a person moves a full sam's club shopping cart mass=80.0 kg from rest to a velocity of 1.30 m/s over a distance of 1.80 meters to secure a spot in check out line. Determine the change in the chart's momentum
A 4.7- kg box of books is pulled up a 4.16- m-long inclined plank to a height of 1.8 m. What percent of the work is lost to friction
A certain atom of has 89 protons. Assume that the nucleus is a sphere with radius 7.25 fm, find the magnitude of the electric field produced by the protons
A person wearing a seat belt can withstand an acceleration of -3.0 x 10^2 m/s^2. Explain how thick should barriers be to safely stop a car that hits a barrier at 110 km/h?
A photon has momentum of magnitude 8.15×10?28kg?m/s. What is the wavelength of this photon
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