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A bag of cement of weight 325 N hangs from three wires as suggested in the figure below. Two of the wires make angles ?1 = 55.0° and ?2 = 24.0° with the horizontal. Assuming the system is in equilibrium, find the tensions in the wires.
A golfer hits a ball from the origin with an initial speed of 30.0m/s at an angle of 50 degrees above the horizontal. what is the speed and direction of motion of the ball just before it lands
A 2.00 kg steel ball strikes a massive wall at 15.0 m/s at an angle of 60.0 degrees with the plane of the wall. compute the average force exerted by the wall on the ball
Which has a greater packing fraction, a diamond crystal structure or a copper crystal structure, how much empty space would be left in each structure
A 400 N stun pilot who has been driving his fighter plane vertically pulls out of the dive by changing her course to a circle in a vertical plane. what is the apparent weight of the pilot at the lowest point
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
A battery provides a voltage of 10.0V and has unknown internal resistance Rint. If the external resistance is then changed to R2 = 7.00? , what is the value of the current I2 in the circuit
Light with all wavelengths present shines on a 1000.0nm thick film of plastic. find all of the visible wavelengths that are seen in the reflected light
A 8.22 nC charge is located 1.82 m from a 4.38 nC point charge. (a) Find the magnitude of the electrostatic force that one charge exerts on the other.
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
A cube of ice is taken from the freezer at -8oC and placed in a 110 g aluminum calorimeter filled with 300 g of water at a temperature of 22oC. What was the mass of the ice cube
A 61 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 11m , and falls a total of 32 m. Calculate the maximum acceleration she experiences
A proposed space station includes living quarters in a circular ring 52.0 m in diameter. At what angular speed should the ring rotate
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