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An object lifted 10 meters gains 200 J of potential energy. If the same object is lifted 20 meters, its potential energy gain is:
Choose one answer.
a. twice as much.b. four times as much.c. more than four times as much.d. the same.e. half as much.
question a cylindrical solenoid of radius 3.0 cm is wound with a turn density of 1300 turnsm. it carries a current of
Suppose an electron starting from rest is accelerated in a uniform electric field directed horizontally and having a magnitude of 3000N/C . The electric field covers a region of space 12.5cm wide.
You drive north on a highway, then, without changingspeed, you round a curve and drive east. What is the changer of your velocity and your acceleration
Three capacitors with capacitances C1 = 2.9 nF, C2 = 3.1 nF, and C3 = 1.7 nF are wired to a battery with V = 14.3 V, What is the potential drop across capacitor 2
Two 2.0-cm-diameter insulating spheres have a 5.30 cmspace between them. One sphere is charged to + 93.0 nC, theother to - 37.0 nC. What is the electric field strength at the midpoint between the two spheres?
A small plastic ball of mass 5.55 x 10-3 kg and charge+0.192C is suspended from an insulating thread and hangs betweenthe plates of a capacitor (see the drawing). The ball is inequilibrium, with the thread making an angle of 30.0owith respect to t..
A suitcase falls out of an airplane which is 400 meters above the ground. How fast is it moving when it reaches the ground
the earth has not only a magnetic field which directs your compass but an atmospheric electric field. during days of
A heat transfer of 8.5x10^5 J is required toconvert a block of ice at -11 *C to water at 11 *C. What was the mass of the block of ice
Determine the magnitude and direction of the force on a horizontal conductor 10cm long and carrying 25 amperes of current from south to north, if places in air in a horizontal magnetic field of flux density .8 w/m2 directed from east to west.
a vertical spring is 10.0 cm long when supporting a 20.0 kg mass and it is 12.0 cm long when supporting a 32.0 kg mass.
A particular motor can provide a maximum of 110.0 N • m of torque. Assuming that all of this torque is used to accelerate a solid, how long will it take for the flywheel to accelerate
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