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A steel ball of mass 0.820 kg is fastened to a cord that is 47.0 cm long and fixed at the far end. The ball is then released when the cord is horizontal, as shown in the figure. At the bottom of its path, the ball strikes a 3.90 kg steel block initially at rest on a frictionless surface. The collision is elastic. Discover (a) the speed of the ball and (b) the speed of the block, both just after the collision.
An airplane of wing span 40.0 m flying horizontally at a speed of 774 km/h due north in a region where the vertical component of the earth's magnetic field is 4.75 *10^-5 T. Find the emf induced across its wing
If the elevator's descending speed is measured at 10 m/s at a given point, but its speed is decreasing by 2.7 m/s2, what is a force exerted by the scale.
a particle lives for a short time before breaking apart into otherparticles. suppose it is moving at a speed of 0.972c
An object weighs 294N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 240N. When it is immersed in oil, it weighs 258N.
The current in a coil with a self-inductance of 1.5mH increasesfrom 0 to 2.0 A in a tenth of a second what is the induced emf in the coil
The carbon isotope 14-C is used for carbon dating of archeological artifacts. What is the recoil speed of the nucleus
One member of a pair of parallel conducting plates has potential 17 V. An electron is ejected from that plate at potential, What is the potential of the second plate
The Hall effect can be used to determine the density of mobile electrons in a conductor. Find the density of mobile electrons in the material
a 0.15 kg. mass is attached to a vertical spring and descends adistance of 4.6 cm. below it's original position. What is the total extension of the spring
A passenger hanging onto a strap notices that an adjacent unused strap makes an angle of 14? to the vertical. What is the radius of the turn
A 418 Hz sound wave travels through a substance. The wavelength of the sound wave is measured to be 1.7 meters
If he struck a ball with the a speed and launch angle that would result in a maximum 120m horizontal range on Earth, how far would it go?
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