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An aluminum block slides along a horizontal surface. The block has an initial speed of 9.4 m/s and an initial temperature of 9.1degrees C. The block eventually slides to rest due to friction. Assuming all the initial kinetic energy is converted to heat energy and all this energy stays in the block, what is the final temperature of the block? (Note: The specific heat of aluminium is 900 J/kg . K)
Knowing the sign of the work done on an object is a crucial element to understanding work. Positive work indicates that an object has been acted on by a force that tranfers energy to the object, thereby increasing the object's energy. Negative wor..
Four identical 7 mC charges are placed on a neutrally- charged penny, Determine the resulting potential in the center of the penny due to the four charges
A curve in a road forms part of a horizontal circle. As a car goes around it at constant speed 14.0 m/s, What is the total horizontal force on the driver if the speed on the same curve is 23.7 m/s instead
A radio receiver can detect signals with electric field amplitudes as small as 250?V/m. What is the intensity of the smallest detectable signal
A parallel plate capacitor has a capacitance of 8.0 µF when filled with a dielectric. estimate the dielectric constant of the dielectric
A 859 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.94 × 10^5 km from the planet's center. What is the force acting on this satellite
A particle executes simple harmonic motion with an amplitude of 7.1 cm. At what displacement (in cm) from the midpoint of its motion will its speed equal one half of its maximum speed?
Draw the free-body diagram of the system and find the value of the force F acting on the piston C.
A block of mass M is at point A on the slope (the slope is just a %u201Cregular roller coaster ride %u201D, What is the velocity at the bottom of the slope at point B which is 5 meters below point A
A baseball pitcher throws a fastball at a speed of 35m/s. The acceleration occurs as the pitcher holds the ball in his hand and moves it throughout an almost straight-line distance of 3.7 m. estimate the acceleration, assuming that it is constant ..
A beam of light with red and blue components of wavelengths 670 nm and 425 nm, respectively, what is the index of refraction of the blue light
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
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