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If an object is moving with constant momentum ‹ 8, ?14, ?4 › kg · m/s, what is the rate of change of momentum d/dt? What is the net force acting on the object?
With the power supply disconnected, the dielectric material is removed and the potential difference between the plates is measured to be 500 V. What is the dielectric constant of the material that was at first used to fill the gap between the plates.
Space vehicles traveling through Earth's radiation belts can intercept a significant number of electrons, Find the resulting surface charge density
A string is clamped at one end and the other end rests on a light, frictionless pulley with a mass hanging below it to provide a tension. What is the mass on the end of the string
A river has a steady speed of 0.42m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at a speed of 1.25 m/s in still water, how long does the trip take.
Water at a pressure of 3.00*10^5 Pa flows through a horizontal pipe at a speed of 1.00 m/s. The pipe narrows to one-fourth its original diameter
the moon has an angular size of .5degrees when viewed with unaided vision from earth. what is the angular size of the moon as seen through this telescope
A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 34 m downstream from point directly across the river, which is 80 m wide.
What least horsepower must a motor have to be able to drag a 280 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
Assume a uniform mass distribution before and after. Icm for a solid sphere of uniform density is 2/5 mr2.
A 20 liter tank of helium is at a pressure of 190 kPa at a temperature of 0 C. What is the speed of the helium atoms in the tank at this new volume
A block of mass 1.60 kg is connected to a spring of spring constant 149 N/m which is then set into oscillation on a surface with a small coefficient of kinetic friction. find the total energy was lost in the first full oscillation
If the bullet has a mass of 21.5 and a speed of 310 , how high would the block rise into the air after the bullet becomes embedded in it.
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