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A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 84°C. The other sample has a mass of 64 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. Determine the specific heat of the unknown second sample.
J/kg·°C
On a cool morning, when the temperature is 14 degrees C, you measure the pressure in your car tires to be 30 psi. After driving 50 mi on the freeway, temperature of your tires is 52 degrees C.
Calculate the number of cells in a hummingbird assuming the mass of an average cell is ten times the mass of a bacterium
One gallon of gasoline contains 3.1 multiply.gif 107 calories of potential energy that are released during combustion. what is the average force produced by the gasoline
ball rolls onto the path of your car as you drive down a quiet neighborhood street. To avoid hitting the child that runs to retrieve the ball, How far did the car move while breaking
a runner of the 100m dash aims to achieve a 10sec time. he accelerates to his final cruising speed in the first 10m. what is his final cruising speed
A professional boxer hits his opponent with a 1000 N (225 lb) horizontal blow that lasts for 0.15 s. Calculate the impulse imparted by his blow
An amount of ideal gas is con?ned to a sealed box at one-half atmospheric pressure, i.e., 50.65 kPa. With clever control, the volume of the box is reduced to 1/8 of its original value (without any gas leaking in or out), while the temperture is ke..
A man traveling on a bicycle at 10 m/s along a straight road that runs parallel to some railroad tracks. What frequency is heard by a stationary observer located between the train and the bicycle
The maximum horizontal displacement of the pendulum bob from equilibrium is 3.00 cm. Calculate the quantum number n for the pendulum
The current in a solenoid is increasing at a rate of 6.37 A/s. The cross-sectional area of the solenoid is ? cm^2, and there are 333 turns on its 11.5 cm length. What is the induced emf opposing the increasing current
Suppose the region outside the chamber is evacuated and the total mass of the block and the movable piston is150 kg. What is the distance s through which the piston rises
You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -18.20 eV. What is the energy of the first photon emitted
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