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Unknown specific heat determined by calorimetry. An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. It is then quickly placed in 0.400 kg of water at 10.0°C, which is contained in a 0.200-kg aluminum calorimeter cup. The final temperature of the system is 30.5°C. Calculate the specific heat of the alloy.
A particle moves along the x-axis. Its position is given by the equation x= 7 + 3t2 - 8t3 where x in meters and t in seconds. Find what is the objects acceleration
A moving 2.7 kg block collides with ahorizontal spring whose spring constant is 426N/m (see figure). The block compresses the springa maximum distance of 15.0 cm from its rest position. The coefficient of kinetic friction between the block and the..
Using Helmholtz coils, what is the equation that relates the current in coils of wire and magnetic field generated? What is special about the magnetic field generated by Helmholtz coils? How can this be tested?
What is the power output of the resistor R1? What is the power output of the resistor R2? What is the power output of the resistor R3?
A fisherman in a boat is using a "10-lb A fisherman in a boat is using a "10-lb test" fishing line. This means that the line can exert a force of 45N without breaking. How heavy a fish can the fisherman land if he pulls the fish up vertically at co..
two point charges of 30 nc and -40 nc are held fixed on an x axis at the origin and at x 76 cm respectively. a
Marble #1 (1.8kg) is traveling horizontally to the right at 5m/s behind marble #2(1.2kg) also traveling horizontally to the right, but at a slower speed of 2m/s. The marbles then collide head-on and elastic. Find the velocity of each marble after..
Select a single-cylinder reciprocating compressor. Sketch the crankshaft, connecting rod, piston, and frame as free bodies when the piston is 60° before head-end dead center on the compression stroke. Sketch the entire compressor as a single free ..
The Hoover Dam hydroelectric power plant has 17 hydroelectric turbines that were installed between 1936 and 1961. Today, the hydroelectric power plant has a total rated capacity of 2,080 MW and generates 4.2 TWh of electricity annually. Assume the..
A small, 300 cart is moving at 1.90 on an air track when it collides with a larger, 1.00 cart at rest. After the collision, the small cart recoils at 0.890. Evaluate the speed of the large cart after the collision?
Happiness, according to Aristotle, is the most desirable of all things. In the past few decade, many researchers have been studying predictors of happiness in an attempt to understand the construct.
A horse races once around a circular track in a time of 118s, with a speed of 17 m/s. What is the radius of the track? How do you go about solving this.
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