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A submarine is 309 m horizontally out from the shore and 149 m beneath the surface of the water. A laser beam is sent from the sub so that it strikes the surface of the water at a point 249 m from the shore. If the beam just strikes the top of a building standing directly at the water's edge, find the height of the building.
A ceiling fan with 80-diameter blades is turning at 68. Suppose the fan coasts to a stop 27 after being turned off. What is the speed of the tip of the blade 10 after the fan is turned off.
A 4m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.50 m and mass 1 kg. The spool is mounted on a frictionless axle and is initially at rest. The cord is pulled from spool with a constant acceleration of magnitu..
You want to design the loop-the-loop toy. The idea is that a ball of mass m=0.01 kg, determine the minimum height necessary for the ball to remain in contact with the track during the whole loop-the-loop journey
Two cars a and b are travelling in the equal direction with velocities A and B(A>B). While the car a is at a distance behind car b, the drive of car a applies break producing uniform retardation r, there will b no collision while.
A charged particle A exerts a force of 2.69 ?N to the right on charged particle B, when the particles are 14.0 mm apart. Particle B moves straight away from A to make the distance between them 17.0 mm. What vector force does it then exert on A?
You have to move a 100kg refrigerator up a 20 degree loading ramp into the back of a pickup truck. Determine the acceleration up the incline
suppose that two objects attract each other with a gravitational force of 16 units. what would be the new force of attraction between the two objects
A cyclist intends to cycle up a hill whose vertical height is 170m.. Assuming the mass of bicycle plus cyclist is 75 kg
In an action movie, the heroine is supposed to jump with a motorcycle from the roof of one skyscraper to another one. what minimum initial speed would she need to make the jump
An isotope of phosphorus called P-32 is radioactive. It decays with half life of 14.3 days with the emission of beta particle. A 1.0 m?Ci source of P-32 is implanted in a tumor where it would deliver radiation dose of 28.6 Gy.
Find the size of the net force produced by a 7 N and an 12 N force in each of the following arrangements. (a) The forces act in the same direction. N= (b) The forces act in opposite directions. N= (c) The forces act at right angles to each other. ..
In a science fiction movie, a 100 g base ball travelling with a speed of 60 m/s and an electron travelling at a speed of 1.2 x 10^8 m/s are approaching each other for a head-on collision
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