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A) A lawn mower has a flat, rod-shaped steel blade that rotates about its center. The mass of the blade is 0.508 kg and its length is 0.594 m. What is the rotational energy of the blade at its operating angular speed of 3510 rpm?
B) If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise?
The drawing shows two situations in which charges are placed onthe x and y axes. They areall located at the same distance of 6.6 cm from the origin O. Foreach of the situations in the drawing, determine the magnitude ofthe net electric field at the o..
Pulling a car from a ditch, To pull a car from a ditch, the driver ties one end of a rope to the car and the other to a tree 12.5 m away.
A cubic box of volume = 0.34300m^3 is filled with air at atmospheric pressure at 20.000*C. What is the net force on one side of the box
One mole of nickel (6E23 atoms) has a mass of 54 grams, and its density is 8.9 grams per cubic centimeter. You have a long thin bar of nickel, 2.0 m long, with a square cross section, 0.12 cm on the side.
In this particular problem and solution, the answer makes sense butone of the conversions does not. For the conversion from density in cm cubed to the density in meters cubed why is the conversion times 10^3? how did this conversion come about when t..
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.51 106 m/s. Find the centripetal acceleration of the electron
The electric field in a certain region is given E=ax(i hat), where a= 48N/Cm and x is the position in meters. Find the volume charge density in the region
If the pump at one end of the hose and the nozzle at the other end are at the same height, and if the pressure at the nozzle is 1 atm, what is the pressure at the pump
A 7430-kg satellite has an elliptical orbit, as in the figure. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. Find the work done by the gravitational force
When a 58-g tennis ball is served, it accelerates from rest to aspeed of 44 m/s. The impact with theracket gives the ball a constant acceleration over a distance of42 cm. What is the magnitude of the netforce acting on the ball?
The rocket above has an exhaust gas velocity of 2723 m/s and a burn rate of 5149 kg/s. If it has a mass of 1,000,000 kg what is its initial acceleration to two decimal places?
A car of mass = 1300 travelling at 56.0 enters a banked turn covered with ice. The road is banked at an angle, and there is no friction between the road and car's tires. What is the radius of the turn if = 20.0 (assuming the car continues in uniform ..
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