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A 7 kg bowling ball strikes a 2 kg pin. The pin flies forwardwith a velocity of 6 m/s the ball continues forward at 4 m/s. What was the original velocity of the ball?
A football is punted with an initial velocity of 28.7 m/s and an initial angle of 54.1o. What is its hang time
It's possible to estimate the percentage of fat in the body by measuring the resistance of the upper leg rather than the upper arm; the calculation is similar. A person's leg measures 39 cm between the knee and the hip, with an average leg diamete..
If the rubber of the balloon itself has a mass of 2.00 g and the balloon is filled with helium, calculate the net upward force (the "lift") that acts on it in air
A Hall-effect probe operates with a 120 -mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0780 T, The thickness of the probe in the direction of B is 1.60 mm. Find the density of the charge carriers
Male mosquitoes in the mood for mating find female mosquitoes of their own species by listening for the characteristic "buzzing" frequency of the female's wing beats. How many wing beats occur in one minute
The velocity vs time graph of an object is approximated by a triangle which starts at v=0 at t=0, rises to a maximum of v=6 m/s at t=6 sec, then returns to zero at t=10 sec. How far did the object travel?
One way to measure on another planet or moon by remote sensing is to measure how long it takes an object to fall a given distance. A lander vehicle on a distant planet records the fact that it takes 3.17 for a ball to fall freely 11.26 , starting fro..
A single conservative force F(x) acts on a 1.1 kg particle that moves along an x axis. What is the maximum kinetic energy of the particle
In a heart pacemaker, a pulse is delivered to the heart 81 times per minute. The capacitor that controls this pulsing rate discharges through a resistance of 2.0 x 106. One pulse is delivered every time the fully charged capacitor loses 62.1% of its ..
A hill is 100m long and makes an angle of 12 degrees with the horizontal. As a 50 kg jogger runs up the hill, how much work does gravity do on the jogger
Two hockey players of equal mass are sliding across the ice rink in a straight line directly toward each other. What is the final velocity of player 2
A proton is accelerated from rest through 500. V. It enters a magnetic field of 0.300 T oriented perpendicular to its direction of motion. determine the frequency with which it moves around this path
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