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A particle moves so that its position (in meters) as a function of time (in seconds) is r = i+ 2t^2j + 4t k . (Use the following as necessary: t.) (a) Write an expression for its velocity as a function of time. (b) Write an expression for its acceleration as a function of time.
Assume the drag force from the water is linearly proportional to speed. Now what is the time required to bring the ship to a stop
A roller coaster car has a mass of 500 kg loaded with passengers. The car passes over a hill of radius 15m, What is the force of the track on the car at the top of the hill
Suppose you wish to make a solenoid whose self-inductance is 1.6 mH. How many turns of wire are needed
If a piccolo has a length of 34 cm, what is the lowest frequency that it can play? Assume the piccolo is like a pipe that is open at both ends
A car of mass 3.0 x10^3 kg traveling at a speed of 20 m/s is passing a truck of mass 7.0x10^3 kg traveling at a speed of 10 m/s in the same direction along the same straight line
A stunt pilot performs a circular dive of radius 715m. At the bottom of the dive pilot has a speed of 265 m/s which at that instant is increasing at a rate of 15 m/s2(along the direction of vector B) What total acceleration does the pilot have at ..
A ball rolls across a floor with an acceleration of 1.00m/s^2 in a direction opposite to its velocity. The ball ahs a velocity of 4.00m/s, What was the inital speed of the ball
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 12-g nail
A cosmic ray electron moves at 7.85 x 10e6 m/s perpendicular to the earth's magnetic field at an altitude, What is the radius of the circular path the electron follows
Brian is trying to pull Julie on a sled across a flat snowy field. Brian pulls on a rope attached to the sled. how much force must Brian exert on the rope to start moving the sled
You have a 120g meterstick. A) Where should you place the meterstick atop your finger so it balances? (Express your answer to two significant figures and include the appropriate units.) B) Where's the balance point if you place an additional 150 mass..
What is the response to the Naturalist concept that human personality, thought, and emotion are purely chemical and electrical reactions.
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