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a. Explain how the age of rocks can be determined by radioactivity. Give an example.
b. How can scientists determine the internal structure of the Earth, if the depth of the deepest well is only a tiny fraction of the earth's diameter?
A woman is going to a friend’s house to discuss opening a business. At 11am she starts from rest and accelerates at a constant 2.5m/s2 for 9s to get to cruising speed. She drives for 15 minutes at this constant speed before she enters city traffic.
An object carries a charge of -8.0 microC, while another carries a charge of -2.0 microC. How many electrons must be transferred from the first object to the second
A young boy with a broken leg is undergoing traction. What is the magnitude of the force exerted on the femur by the lower leg
A lens system consists of two lenses18.0 cm apart. The first lens is convex (converging) and has a focal length of 9.90 cm. An object is placed 3.96 cm in front of the first lens and produces an image 9.90 cm behind the second lens. What is the focal..
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 13 m/s at an angle of 24° above horizontal. How high is the ball when it hits the wall
A 1200 kg frictionless roller coaster starts from rest at a height of 22 m. What is its kinetic energy when it goes over a hill that is 13 m high
At some instant, an alpha particle (q=+2e) has the coordinates (3.0, 0.0, 0.0)(nm) and is moving along the positive x axis with 500 km/s, Obtain the magnitude and direction of the magnetic force felt by each particle
An oil production well produces from a formation that is 10 ft thick and has a permeability to oil of 50 millidarcies. The well produces only oil. Estimate the steady state production rate in bbl/day, assuming that the pressure (P) at the effective d..
What is the ratio of the amplitude
Explain how a submarine is caused to submerge and surface without the use of its propulsion propeller and fins
Vector A~ has a magnitude of 9 and points in the positive x-direction. Vector B~ has a magnitude of 19 and makes an angle of 38? with the positive x-axis
A 0.504 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger and comes to rest some distance above the plunger. The plastic tube has an inner radius of 7.07 mm, and is frictionles..
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