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A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable at an angle of 30.0 degrees with the beam helps support the light. Find (A) the vertical component of the force exerted by the pole on the beam. (B) the horizontal component of the force exerted by the pole on the beam. (C) the tension in the cable. Compute these values by computing torques around the junction between the cable and the beam at the right hand of the beam. I know that this can be done using newtons laws (by drawing a force diagram) but how do I solve this with torque?
A satellite is in circular orbit around the Earth at a distance of 7.14RE with a speed of 2.96 km/s. With what speed would the satellite hit the Earth's surface
question1a hunter wishes to cross a river that is 1.4 km wide and that flows with a speed of 7 kmh. the hunter uses a
The intensity of the sound wave from a jet airplane is 9.1 W/m2 at a distance of 130 m. At what rate does the jet airplane radiate energy in the form of sound waves
An AC generator is to have a maximum output of 332 V. Each coil has an area of 0.125 m2 and a resistance of 15.3 ? and rotates in a magnetic field of 0.739 T with a frequency of 35.7 Hz, Determine the induced emf as a function of time
A positive point charge Q1 = 5.0*10-5 C is fixed at the origin of coordinates, Find the location(s) where the total electric field is equal to zero
A pocket ion chamber is built with an internal volume of 10 cc and a capacitance of 20 pF. calculate the minimum gamma-ray expose to which the pocket chamber will be sensitive
Calculate the acceleration of the arrow in the bow.
A ranger in a national park is driving at 52 km/h when a deer jumps onto the road 86 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -2.9 m/s2.
An object 0.600 cm tall is placed 17.0 cm to the left of the vertex of a concave spherical mirror having a radius of curvature of 24.0 cm. determine the height of the image and describe the image. upright/virtual / real/ inverted/ enlarged/ behind th..
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
A man stands on the roof of a building of height 13.0and throws a rock with a velocity of magnitude 30.0 at an angle of 34.9 above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock.
A ferromagnetic metal at very low temperatures has a specific heat capacity given by c(T)= zT+yT^3+zT^(3/2). find the entropy increase due to this process
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