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A certain sprinter has a top speed of 11.0 m/s. If the sprinter starts from rest and accelerates at a constant rate, he is able to reach his top speed in a distance of 12.0 m. He is then able to maintain this top speed for the remainder of a 100 m race. (
a) What is his time for the 100 m race?
(b) In order to improve his time, the sprinter tries to decrease the distance required for him to reach his top speed. What must this distance be if he is to achieve a time of 10.0 s for the race?
A horizontal wire is hung from the ceiling of aroom by two massless strings. The wire has a length of 0.24m and a mass of 0.006 kg. A uniform magneticfield of magnitude 0.050 T is directed from theceiling to the floor. When a current of I = 25A ex..
A small welding machine uses a voltage source of 120 V at 60 Hz. When the source is operating, it requires 1200 W of power, and the power factor is .75. FInd the rms current in the machine while operating
1. suppose after charging a 4.8 microf capacitor to 8 v you connect it to the second uncharged capacitor of 6 microf.
An interstate highway has been built through a neighborhood in a city. In the afternoon, the sound level in an apartment in the neighborhood is 95.0 dB as 105 cars pass outside the window every minute. Late at night, the traffic flow is only six c..
A 1.00x10^2 kg crate is being pushed across a horizontal floor by a force P that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.200. What must be the magnitude of P, so that the net work done by it and the k..
A jet is circling an airport control tower at a distance of 18.0 kilometer. An observer in the tower watches the jet cross in front of the moon. Obtain the distance traveled by the jet as the observer watches
Calculate the Q value in MeV for the double Beta decay of 128Te (atomic mass 127.904461 a.m.u.) to 128Xe (atomic mass 127.903531 a.m.u.).
At one instant, force = 5.40 N acts on a 0.399 kg object that has position vector = (1.81 -1.81) m and velocity vector = (-5.91 + 5.91) m/s. determine the object's angular momentum
What is the strength and direction of the magnetic field halfway between the wires? What is the strength and direction of the magnetic field a distance 1 cm below the bottom wire?
A certain part of an aircraft engine has a volume of 1.2 ft3. Find the weight of the piece when it is made of copper
A car starts from rest with an acceleration of 3 m/s/s. How far will the car travel in 6s? What is the velocity of the car after 6s
A uniform rod rotates in a horizontal plane about a vertical axis during one end. The rod is 6.00m long, weighs 10.0 N, and rotates at 240 rad/min. Compute (1) its rotational inertia about the axis of rotation and (2) the magnitude of its angular mom..
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