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A hand-cranked AC generator is used to cause 0.65 A of current (rms) to flow through a 30W resistor in parallel with a 60 W resistor. What is the minimum average rate at which work must be done on the generator?
What is the length of the greatest and thinnest string that can be located under a tension of 860 without breaking .
Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, and the gravitational constant G, What is the density of the sun
A bullet of mass 0.0022 kg initially moving at 503 m/s embeds itself in a large fixed piece of wood and travels 0.71 m before coming to rest. Assume that the acceleration of the bullet is constant.
Find out the magnetic force on the rod
A turtle ambles leisurely-as turtles tend to do-when it moves from a location with position vector r1,x = 1.49 m and r1,y = -2.77 m in a lettuce garden to another location, with position vector r2,x = 3.77 m and r2,y = -4.19 m, where the lettuce a..
A block of iron has the dimensions of 3.00 cm x 3.00 cm x 3.00 cm. It has a mass of 213 g. When placed in water, the block sinks. What volume of water did it displace.
When a single person shouts at a football game, the sound intensity level at the center of the field is 59.9dB. When all the people shout together, the intensity level increases to 111dB.
When a car's starter is in use, it draws a large current. The car's lights draw much less current. As a certain car is starting, What is its internal resistance
What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here.
A point mass of m1 = 2.3 kg is placed at the origin. Masses m2 = 5.4 kg and m3 = 7.6 kg are placed at 3.5 m and -5.8 m on the x-axis, respectively. Find out the location on the x-axis of the center of mass.
A playground merry-go-round has radius 2.90m and moment of inertia 2500kg?m2 about a vertical axle through its center, and it turns with negligible friction. How much work did the child do on the merry-go-round
A 21 g bullet travelling at 255 m/s is fired into a 0.452 kg wooden block anchored to a 100 N/m spring. How far is spring compressed to the nearest thousandth of a meter.
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