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A metal container, which has a mass of 8.4 kg contains 15.3 kg ofwater. A 2.1-kg piece of the same metal, initially at a temperatureof 160.0°C, is dropped into the water. The container and thewater initially have a temperature of 15.4°C and the final temperature of the entire system is 17.4°C. Calculate the specific heat of the metal.
What is the minimum diameter mirror on a telescope that would allow you to see details as small as 4.90 km on the moon some 384000 km away
A projectile of mass m is fired from the surface of the earth at an angle a from the vertical, where a = 0.75 radians. Calculate the maximum height that the projectile will reach
A system consists of two positive point charges, q1 and q2>q1. The total charge of the system is +62.0 x 10^-6 C, Find q1 and q2
When a cannon with a longer barrel is fired, the force of expanding gases acts on the cannonball for a longer distance. What effect does this have on the velocity of the emerging cannonball
A proton with v=440 m/s is moving through a region in which the magnetic field is B=2.6T. what angle does the proton's velocity make with B
A swimmer swims north at .35 m/s relative to still water across a river that flows at a rate of .15 m/s from west to east. Calculate the direction of swimmer's velocity relative to the riverbank
Much of the material making up Saturn's rings is in the form of tiny dust grains having radii on the order of 10-6 m. These grains are located in a region containing a dilute ionized gas, and they pick up excess electrons. As an approximation, sup..
A wrench is thrown at a speed of79 mph at a wall that is 44 ft away. Upon colliding with the wall the wrench exerts 77lb of force due east on the wall. How much force does the wall exert on the wrench and in what direction?
A gunner wants to fire at a target at a horizontal distance of 12500 m from his position. If his gun fires with a muzzle speed of 700 m/s and if g = 9.81 m/s^2, what is the correct elevation angle
A ball is thrown so that its initial vertical and horizontal components of velocity are 30 m/s and 25 m/s, Estimate the maximum height the ball reaches
a plate carries a charge of -2.6 microc while a rod carries a charge of 2.4 microc. how many electrons must be
A one kilogram textbook drops from a one-meter high table in a room at 250C temperature. Find the change in entropy after the system has reached equilibrium
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