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An unknown substance has a mass of 0.125 kg and an initial temperature of 112.3°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at 27.8°C. The mass of the aluminum container is 0.150 kg, and the temperature of the calorimeter increases to a final equilibrium temperature of 32.0°C. Assuming no thermal energy is transferred to the environment, calculate the specific heat of the unknown substance. =_____J/kg · °C
A block of mass m = 309 g is dragged with a string across a rough horizontal table. The string tension is T = 3.59 N, What is the power supplied by the force of friction
To Bounce a ping-pong ball into a cup at the other end of a table, what is the net force of the ball on the table
A 65-? loudspeaker, a 8.0-? loudspeaker, and a 2.1-? loudspeaker are connected in parallel across the terminals of an amplifier. Determine the equivalent resistance of the three speakers
q1. a toolbox is carried from the base of the ladder at point a. the toolbox comes to a rest on a scaffold 5.0 m above
A 17-kg projectile is fired at an angle of 60° above the horizontal and with a speed of 240 m/s. At the highest point of its trajectory the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial spe..
Insects do not have lungs as we do, nor do they breathe through their mouths. Instead, they have a system of tiny tubes, called tracheae, find the oxygen concentration at the interior end of the tube
A circular coil of wire 8.40cm in diameter has 16.0 turns and carries a current of 2.60A . The coil is in a region where the magnetic field is 0.580 T, What is this maximum torque in part (A)
A car accelerates from rest at a constant rate of 2.0 m/s^2 for 5.0 s. What is the speed of the car at the end of that time
An isolated conductor of arbitrary shape has a net charge of 6.0 uC. Inside the conductor is a cavity within which is a point charge 66.5 uC, What is the charge on the outer surface of the conductor
question1a plate of mass m moves horizontally with speed v on a frictionless table. a mass m is dropped vertically onto
A block of ice at 0 degrees C, whose mass is initially 30.0 kg, slides along a horizontal surface, starting at a speed of 5.56 m/s and finally coming to rest after travelling 21.8 m. figure out the mass of ice melted (in grams) as a result of frictio..
A transformer has a primary coil with 1200 turns and a secondary coil with 225.0 turns. what is the voltage output from the secondary coil
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