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A light board, 10m long, has two supports, one at one edge of the board and a second at the mid point. A 40N weight is placed two sawhorses, 3.0 m from the edge and 2.0m from the center. A second weight with a of 15N is placed on the far end from the supports. What is the force exerted by the sawhorse at the end of the board?
A 11.9-g mass is suspended 1.47 cm above a nonconducting flat plate, directly above an embedded charge of q. If the mass has the same charge, q, how much must q be so that the mass levitates (just floats, neither rising nor falling)? If the charge..
An object placed on an equal-arm balance scale requires 12 kg to balance it. When object is placed on a spring scale, the spring scale reads 12 kg.
questionthough 0 is often referred to as lower threshold of human hearing it is important to realize that the human ear
A high energy photon is scattered at an angle of ? =180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
If the player hears the sound of the splash 3.19 s later, illustrate what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.
Two rockets having the same acceleration start from rest, but rocket A travels for twice as much time as rocket B, If rocket A reaches a speed of 390m/s , what speed will rocket B reach
A horizontal pipe contains water at a pressure of 100kPa flowing with a speed of 2.0m/s . The pipe narrows to one-half its original diameter. What is the speed of the water
question1a car is stopped at a traffic light. it next travels along a straight road so that itsnbspdistance from the
A ray of light strikes a flat block of glass (n = 1.53) of thickness 1.80 cm at an angle of 36.0° with the normal. find the angles of incidence and refraction at each surface
A 500g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle, the tension in the string is 12N
A mountain climber gains 897 m in elevation on a particular hike. Consider the climber's body as a heat engine, how much heat does the food supply
Consider a car undergoing these two displacements: D1 (3 km, 4 km) and D2 (4km, -3 km). how far will the car then be from its starting point
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