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A 42.0 kg child sits in a swing supported by two chains, each 3.06 m long.
(a) If the tension in each chain at the lowest point is 341 N, find the child's speed at the lowest point.(b) What is the force exerted by the seat on the child at the lowest point? (Neglect the mass of the seat.)
a horizontal magnetic field of 1.0 x 10-4 t is at an angle of 30o to the direction of the current in a straight wire 75
Most of the motion generated by joints in the human body are examples of levers. An example of a third class lever is the forearm; what force is exerted by the biceps muscle
A 3000mL flask is initially open to air at 22°C and 1atm pressure. It's then closed and immersed in boiling water. How many moles escape when the air is released
A satellite moves in a circular orbit around Earth at a speed of 4880 m/s. Find the satellite's altitude above the surface of Earth
How much work the power plant produces in a day. How much energy is discarded to low temperature source in a day.
When a woman who is 2 m tall stands near a flagpole, the shadow of her head and the shadow of the top of the flagpole are superimposed, Find the height of the flagpole
Three deer, A, B, and C, are grazing in a field. Deer B located 64.00 m from dear A at an angle of 50° north of west. Deer C is located 76° north of east relative to dear A. The distance between deer B and C is 93m. What is the distance between de..
you place a 7.73-mm-high chocolate chip on the axis of and 12.7 cm from a lens with focal length 5.45 cm. if it can be
A capacitor with an initial potential difference of 100 V isdischarged through a resistor when a switch between them is closedat t = 0. What is the time constant of the circuit
In one dimension, an inertial ball of mass 1 kg has a speed of 1.50 m/s to the right and another inertial ball of mass 3 kg has a speed of 2.00 m/s to the left. Find the velocity of the center of mass after the collision
a 730.0 n man carrying a 1.9 kg physics textbook stands at the center of a frozen pond of radius 10.0 m. he is unable
Two point charges, Q1 = -7 and Q2 = 2 are located between two oppositely charged parallel plates. The two charges are separated by a distance of x = 0.33m. Assume that the electric field produced by the charged plates is uniform and equal to E = 6..
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