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A person pushes a 12.3-kg shopping cart at a constant velocity for a distance of 16.5 m on a flat horizontal surface. She pushes in a direction 24.2 ° below the horizontal. A 51.0-N frictional force opposes the motion of the cart.
(a) What is the magnitude of the force that the shopper exerts? Determine the work done by
(b) the pushing force,
(c) the frictional force, and
(d) the gravitational force.
What is he wavelength of a 22.75*10^9 Hz radar signal. What is the frequency of an X-ray with wavelength 0.12nm
A car travels at a constant speed around the circular track or a radius of 2.6 km. it goes around the track once in 360 seconds.
The velocity component of the particle at x = 8.0 m is 2.8 m/s. Illustrate what is the acceleration component during this time interval?
Consider a hollow circular cylinder. Use Gauss's law to show that the field inside the pipe is zero. Also show that the field outside is the same as if the charge were all on the axis.
What is the magnitude of the acceleration caused by magnetic force? Ignore the gravitational force acting on the electron.
Gas in a cylinder similar to the one shown in the figure moves a piston with area 0.223 m2 as energy is slowly added to the system. find the displacement of the piston
A particle of mass m0 is given a kinetic energy equal to one-third its rest-mass energy. How fast must the particle be traveling
Sam, whose mass is 74 kg, straps on his skis and starts down a 67-m-high, 20 ^\circ frictionless slope. Find Sam's speed at the bottom using work and energy
A base on Planet X fires a missile toward an oncoming space fighter. The missile's speed according to the base is 0.81 c. How fast is the space fighter traveling relative to Planet X
A 12kg hammer strikes a nail at a velocity of 8.2m/s and comes to rest in a time interval of 8.0. What is the average force acting on the nail
If a transformer steps the voltage down from 8800 V (at the pole) to 120 V (at the building) and it is to deliver 1000 kW to the building at 80% efficiency, what is the ratio of primary turns to secondary turns
A 50-cm-thick layer of oil floats on a 120-cm-thick layer of water. What is the pressure at the bottom of the water layer
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