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A block whose weight is W= 250 nt is on a frictionless plane which is at angle q= 25 degrees. A cable between the ceiling and the block makes an angle q=55 degrees from the ceiling. See diagram with given parameters, angles, physics statements, and a polygon created from known information. Also an illustration of the Law of Sines and Law of Cosines.
Find the force C in the cable, and the normal force N on the block by the plane.
10-nC point charge is located at the center of a thin spherical shell of radius 8.0 cm carrying -20 nC distributed uniformly over its surface. What is the magnitude of the electric field 2.0 cm from the point charge
As the drawing shows, the bullet puts a hole in a window of another building and hits the wall that faces the window. h is 0.54 m and d is 8.0 m. Assume that the bullet does not slow down as it passes through the window. Evaluate the Distance H
A toy cannon uses a spring to project a 5.28 g soft rubber ball. The spring is originally compressed by 5.06 cm and has a force constant of 8.08 N/m. At what point does the ball have maximum speed
You swing a 2.60 stone in a circle, using the full length of a thin 80.0 rope. At what speed should you swing it so its acceleration will be 9.8
When a 21 ohm resistor is connected to a battery that has a 7 ohm internal resistance the terminal voltage of the battery is 9 V. Determine the emf of the battery
All atoms of an element have the same Select one: a. mass number b. atomic number c. number of isotopes d. number of neutrons Which particle is the least massive? Select one: a. proton b. electron c. nucleus d. neturon An electron is a particle with ..
Metal disks are initially spinning on cushions of air, in a standard rotational dynamics apparatus. What is the final angular velocity of the two disks
a an ideal gas occupies a volume of 2.8-cm3 at 20degc and atmospheric pressure. determine the number of molecules of
An object is 30.0 cm in front of a concave mirror with a 7.0-cm focal length. Determine the image position
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
q1. a student stands several meters in front of a smooth reflecting wall holding a board on which a wire is fixed at
A heat engine has a useful work output of 4.0 kJ and expels 8.0 kJ of exhaust energy in each cycle. what is the engine's thermal efficiency
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