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A very old specimen of wood contains 10^12 atoms of carbon:
a) How many C-14 atoms did it contain in the year of 9474 B.C.?
b) How many C-14 atoms did it contain in 2004 A.D.?
Household wiring made of aluminum wire with cross section area 3.1 x10^-6 m2 carries a current of 4.5 A. The bulk resistivity of aluminum is 2.82 x10^-8. What is the power loss over 5.2 m of wire?
A 48.9 kg girl is standing on a 129 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is the velocity of the plank relative to the ice surface
A horizontal force of 2.3 N is applied to the 3.0 kg box in the positive direction - What is the tension of the cord?
An object moves with constant acceleration 4.35 m/s2 and over a time interval reaches a final velocity of 11.0 m/s. What is the distance it travels during this interval
A 45.0g gold ball is hit off a tee and flies off at 50.0m/s. if the golf club was in contact with the ball for 10.5ms, find the impulse imported to the ball
Illustrate what is the speed of the three coupled cars after the collision? How much kinetic energy is lost in the collision?
A 0.280 kg croquet ball makes an elastic head-on collisionwith a second ball initially at rest. The second ball moves offwith half the original speed of the first ball. What is themass of the second ball
q1. a vertical electric field of magnitude 3.00 104 nc exists above the earths surface on a day when a thunderstorm is
Charge of uniform density 12 nC/m is distributed along the x axis from x = 2.0 meter to x = 5 meter. Determine what is the electric potential
A beaker of water rests on an electronic balance that reads 999.0 g. A 2.4 cm-diameter solid copper ball attached to a string is submerged in the water, What is the new balance reading
The average intensity of sunlight reaching the earth is 1390 W /m 2 . A charge of 3.00*10 -8 C is placed in the path of this electromagnetic wave. What is the magnitude of the maximum electric force that the charge experiences?
A spinning flywheel has rotational inertia I = 403.9 kg · m2. What is the frictional torque acting
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