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What is the entropy changes, delta S (in units of J/K) when Argon gas (Ar), at 1.00 atm in a 0.5 L container is allowed to expand to 1 L at a constant temperature of 25 degrees celsius. Note: the ideal gas law is PV=nRT.
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Question: It is proposed that future space stations create an artificialgravity by rotating. Suppose a space station is constructed as a1000-m-diameter cylinder that rotates about its axis. The insidesurface is the deck ...
John is traveling north at 20 meters/second and his friend Betty is traveling south at 20 meters/second. If north is the positive direction, what are John and Betty's speeds?
Question: A point charge q1 = 4.00 nC is placed at the origin, and a second point charge q2 = -3.05 nC is placed on the x-axis at x = 21.0 cm. A third point charge q3 = 1.90 nC is to be placed on the x-axis between q1 an ...
Question: In one of the classic nuclear physics experiments at the beginning of the 20th century, an alpha particle was accelerated towards a gold nucleus and its path was substantially deflected by the Coulomb interacti ...
In chemical changes, new substances are formed. Do the atoms involved actually change? If not, what has changed? How would you help your students visualize this?
Problem: A block oscillating on a spring has a maximum speed of 20cm/s. What will be the block's maximum speed if its totalenergy is doubled? Explain. (in its simplest form of physics,please) The response must be typed, ...
A car accelerates down a hill, going from the rest to 30.0 m/s in 6.00 s. A toy inside the car hangs by a string from the car's ceiling. The ball in the figure represents the toy, of the mass 0.200 kg. The acceleration u ...
Question: A roller coaster moves 200 ft horizontally, then rises 135 ft at an angle of 30.0° above the horizontal. Next, it travels 135 ft at an angle of 40.0° below the horizontal. Use graphical techniques to find the r ...
Question: To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and t ...
Question: A stretched spring stores 3.4 J of energy. How much energy will be stored if the spring is stretched three times as far? The response must be typed, single spaced, must be in times new roman font (size 12) and ...
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