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In a swimming race, a father gives his 4 year old son a 10 second head start. The pool is 25 meters long. The child swims at 0.8 m/sec ; father at 1.20 m/s. (a) how far is the child ahead of the father gets to swimming? (b) at what time does the father come alongside his son? (c) how far has the father swam at that point? (d) who wins the race? Explain. (e) draw the displacement for the father and son.
A 3 kg block initially traveling at 5 m/s collides with a 1 kg block (initially at rest) sitting near the base of a hill. how high up the hill do the two blocks slide after the collision
A piccolo and a flute can be approximated as cylindrical tubes with both ends open. What is the ratio of the piccolo's length to the flute's length
A butterfly at eye level is 26 cm in front of a plane mirror. You are behind the butterfly, 48 cm from the mirror. What is the distance between your eye and the image of butterfly in the mirror.
Unpolarized light travels throughout 2 linear polarizers. What (minimum) angle should the second polarizer be relative to the first polarizer (the difference between q1 and q2) so that the final intensity of light is 1/3 original value.
a loaded cart has a total mass of 227kg.if a 312n force acting at an angle of 30degree to the ground is applied. how much work is done in moving the cart 15meters?
A thermos contains 159 cm3 of coffee at 93.7 °C. To cool the coffee, you drop two 13.2-g ice cubes into the thermos. What is the final temperature of the coffee
A prospector finds a solid rock composed of granite (density = 2650 kg/m3) and gold, What mass of gold is contained in the rock
A ball rolls horizontally with a speed of 9.0m/s off the edge of a tall platform. what is the height of the platform
A person with a mass of 71.6 kg and a volume of 0.089 m3 floats quietly in water. find the volume of the person that is above the water
What is the value of g at the location of this satellite. Discover the altitude of the satellite in meters.
An electric field of 9.45 105 V/m is desired between two parallel plates, each of area 37.0 cm2 and divided by 2.45 mm of air. What charge must be on each plate.
Assuming a fica tax rate of 8% on the first 106,800 in wages, and a federal income tax rate of 20% on all wages, illustrate what would be an employee's net pay for the year if he earned 108,000?
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