First Law of Thermodynamics: A cylinder contains 8.8 moles of ideal gas, initially at a temperature of 126°C. The cylinder is provided with a frictionless piston, which maintains a constant pressure of 5.3 × 105 Pa on the gas. The gas is cooled until its temperature has decreased to 27°C. For the gas Cv = 13.73 J/mol ? K. The ideal gas constant is R = 8.314 J/mol ? K. For this process, calculate:(a) the work done by gas(b) the net change in the internal (thermal) energy of the gas(c) the heat transferred to the gas.
What will be an ideal response?
(a) -7200 J (b) -12,000 J (c) -19,000 J
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Ignoring air resistance, which of these is the acceleration of a falling object?
a. The length of time it takes to reach the ground. b. About 10 (meters per second) per second. c. About 10 (meters per second) per meter. d. About 10 meters per second. e. Falling objects fall at different speeds, so none of these answers can be right.
The oldest parts of Earth's crust are located along the mid-ocean rifts
a. True b. False Indicate whether the statement is true or false
Force on a Wire: A wire along the z-axis carries a current of 4.9 A in the +z direction. Find the magnitude and direction of the force exerted on a 3.3-cm long length of this wire by a uniform magnetic field pointing in the -x direction having a magnitude 0.43 T.
What will be an ideal response?
Force on a Wire: A straight 1.0-m long wire is carrying a current. The wire is placed perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.60 N, what is the current in the wire?
A. 2.0 A B. 1.0 A C. 3.0 A D. 4.0 A E. 5.0 A