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Question: A motorist drives along a straight road at a constant speed of 80 m/s. At t = 0 she passes a parked motorcycle police officer, and the officer takes off after her with acceleration, a(t) = bt, where b is a constant and t is the time (i.e., the acceleration varies linearly with time). If the officer maintains this rate of acceleration, what is the speed of the police officer when he reaches the motorist (in m/s)?
a spherical charged shell of radius r1 is concentric with a spherical charged shell of radius r22r1. the surface
a system has 1000 joules of energy added to it and performs 800 joules of work. calculate the change in internal
A small plastic sphere of mass m= 2 g is suspended by light string in 20 centimeter in length, a uniform electric field, evaluate the net charge on the ball
The timing device in an automobile's intermittient wiper system is based on an RC time constanst and utilizes a .200uF capacitior and a variable resistor. over what range must R be made to vary to achive time constants from 9 to 20 S.
One slit of a double-slit arrangement is covered with a thin plastic plate of refractive index, 1.4, and the other by a thin plastic of refractive index 1.7. the point on the screen at which the central maximum fell before the plastic plates were ins..
In order for the turbines to work most efficiently the water should enter them at a speed of 20 m s -1. In order to achieve this the pipe narrows to what radius just before it enters the turbines?
A platform is rotating at an angular speed of 2.5 rad/s. A block is resting on this platform at a distance of 0.34 meter from the axis. obtain the smallest distance from the axis at which the block can be relocated and still remain in place as the ..
If it has a mass of 14.0 g, what is the minimum current (in Amperes) through the wire that would cause a magnetic force equal to its weight
Suppose a planet is discovered that has the same amount of mass in a given volume as the Earth, but has radius 1/5 . Calculate the acceleration due to gravity on this planet
Two protons are released from rest when they are 7.00mm apart. Calculate maximum acceleration
a gas cylinder holds 0.100g of at 180 degrees cand a pressure of 3.50atm. the gas expands adiabatically until the
A railroad freight car, mass 15000kg, is allowed to coast along a level track at a speed of 2.0m/s. It collides and couples with a 50000kg loaded second car, initially at rest and with brakes released. What percentage of the initial kinetic energy of..
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