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Assume the earth to be sphere of a uniform density,
(a) what is its rotational energy? Take the radius of the earth to be 6,400 km and the mass of the earth to be 6x10^24kg.
(b) suppose that this energy could be harnessed for our use. For how long could the earth supply 1.0kw of power to each of the 4.2x10^9 persons on the earth?
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 51.0cm. Find the period of the pendulum
Determine the magnitude and direction of the force between two parallel wires 15m long and 6.0cm, Determine the magnitude of the force between two parallel wires
A block with a mass m= 5.7 kg is pulled up a 29 degree incline with the force of magnitude F = 38N. Find the acceleration of the block if the incline is frictionless
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance x = 0.91 m from the end of the track after falling a vertical distance h2 (bottom of ramp)= 1.03 m from the ..
A shell is fired from the ground with an initial speed of 1.56 multiplied by 103 m/s at an initial angle of 40° to the horizontal. find the shell's horizontal range
Two point charges lie along the y-axis. A charge of q1 = -9.5 ?C is at y = 6.0 m, Locate the point (other than infinity) at which the total electric field is zero
Assume that an initially stationary gold nucleus remains motionless during a head-on collision with an 8.3 MeV alpha particle, What is the actual recoil speed of the gold nucleus after that elastic collision
A 60 kg trunk is pushed 4.0 m at constant speed up a 30° incline by a constant horizontal force. Calculate the work done by the weight of the trunk
A vertical spring stretches 4.2 cm when a 14-g object is hung from it. The object is replaced with a block of mass 22 g that oscillates up and down in simple harmonic motion. Calculate the period of motion. ____s . Use the given information to find t..
Two point charges q1= 5.00x10^-6C and q2= -3.0x10^-6C are located on x-axis at x1= -0.4m and x2=0.6m, Find the electric field and the electric potential at the origin
Two capacitors, C1 = 25 µF and C2 = 4.0 µF, are connected in parallel and charged with a 110 V power supply. Calculate the total energy stored in two capacitors
A cannon tilted up at a 30° angle fires a cannon ball at 65 m/s from atop a 12 m high fortress wall. What is the ball's impact speed on the ground below
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