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An archeological specimen containing 10.2 g of carbon has an activity of 1.6 Bq. How old (in years) is the specimen?
A child, hunting for his favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round. What is the shortest time it takes for the child to catch up with the horse
A train (an engine and four cars) is accelerating at 1.60 m/s^2 . The mass of each car is 3.60 x 10^4 kg, What is the force of the first car on the second car
A piece of string 5.30 m long has a mass of 14 g. What must the tension in the string be to make the wavelength of a 128 Hz wave 120 cm.
Unpolarized light is incident on a system of 4 polarizers. Where the preferential direction of the second is 20 degrees with respect to the first, What is the intensity of the transmitted light
Three identical capacitors are connected in parallel to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry
you kick a soccer ball 15 meters without hurting your foot much. you then pump the ball up until it is really hard the
The gravitational force between two masses M and m separated by a distance r is 40 N. What is the new force when this distance is halved?
The moment of inertia about the axis of rotation of the remainder of his body is constant and equal to 0.450kg?m2. If the skater's original angular speed is 0.450rev/s, What is his final angular speed
A 76 kg window cleaner uses a 13 kg ladder that is 5.0 m long. He places one end on the ground 3.0 m from a wall, What is the angle of this force on the ladder
The pilot of an aircraft wishes to fly due west in a 30.8 km/h wind blowing toward the south. In what direction should the aircraft head
What is the turntable rotation angular velocity
A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from the impact: one travels in the air and the other in the concrete, and they are 6.60s apart. How far away did the impact ..
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