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A police officer spots a speeding car traveling at 20 m/s (approximately 44 mph) as it passes. The officer immediately starts to drive, accelerating from rest at a rate of 5 m/s2. How far will the officer have to drive before catching up to the speeding car?
A hotel elevator ascends 170 {rm m} with a maximum speed of 5.90 {rm m/s}. Its acceleration and deceleration both have the magnitude of 1.3 {rm m/s^2}.
A sheet of plywood 1.39 cm thick is used to make a cabinet door 55.5 cm wide by 69.5 cm tall, what is the moment of inertia of the door about the hinges
charge q1=1 ?C is located at the position (x,y,)=(5 cm, 7 cm). A second charge, q2=2 ?C is located at the position (x,y,)=(5 cm, 0 cm). Calculate the work required to move a third charge
Two stars with equal areas and emissivities have surface temperatures of 4,061 K and 6,078 K respectively
A rocket burns fuel at a rate of 200 kg/s and exhausts the gas at a relative speed of 4.0 km/s. Find the thrust of the rocket
A 1.9 mol sample of hydrogen gas is heated at constant pressure from 302 K to 410 K. Calculate the energy transferred to the gas by heat.
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
A solid has a volume of 8cm3. When weighed on a spring scale calibrated in grams, the scale indicates 20g. What does the scale indicate if the object is weighed as immersed in a liquid of density 2g/cm3.
a proton is rotating in a 7.19 * 10^ -11 m radius circle with a frequency of 5 * 10 ^15 Hz, How large is the resultant magnetic field
The "Giant Swing" at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end, Find the time of one revolution of the swing if the cable supporting a seat makes an angle of 30.0? with the vertical
A 1.15-k? resistor and a 590-mH inductor are connected in series to a 1250-Hz generator with an rms voltage of 13.1V, What is the rms current in the circuit
A football player carrying the ball runs straight ahead at the line of scrimmage and directly into a wall of defensive linemen. Find the magnitude and direction of his average acceleration
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