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A 75 g arrow is fired from a bow whosestring exerts an average force of 95 N on the arrow over a distanceof 76 cm. What is the speed of the arrowas it leaves the bow?
A diffraction grating has 4272 lines/cm. Calculate the width of the dark area between the first and second order spectra on a screen 3.3 m away
the number of radioactive nuclei present at the state of an experiment is 2.78e15. the number present twenty days later is 5.14e14. what is the half life in days of the nuclei
A diving board of length 3 is supported at a point 1 from the end, and a diver weighing 480 stands at the free end. The diving board is of uniform cross section and weighs 295.
A basketball player jumps straight up and then lands 0.49 seconds after leaving the ground. Find the initial velocity of the player
a simple pendulum with a length of 1.93 m and a mass of 6.54 kg is given an initial speed of 2.46 ms at its equilibrium
Assume a typical hummingbird has a lifespan of 4.0 years and an average heart rate of 1300 beats per minute. (a) Calculate the number of times a hummingbird's heart beats in its life, and express it in scientific notation.
A 77.4 kg manm lifts a 1.3 kg box from the floor a height of 1.1m in 2.1 seconds, what is the change in gravitational potential energy
Consider an object on an incline where friction is present. The angle between the incline and the horizontal is ?, Find an expression for the acceleration of this object. Treat down the incline as the positive direction
A tank having a volume of 0.11 m3 contains helium gas at 170 atm. How many balloons can the tank completely fill
An aircraft takes off at 203 km/h after accelerating from rest at 2.14 m/s2. What is the minimum runway length required
A 0.350 kg air-track glider is attached to each end of the track by two coil springs. Find the effective spring constant of the system
a solid sphere m2.0 kg and r0.5 m is rolling without slipping on a horizontal surface at speed vcm4.3 ms when it
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