Chapter 1: Problem 36
The temperature of a system rises by \(70^{\circ} \mathrm{C}\) during a heating process. Express this rise in temperature in kelvins.
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A health magazine reported that physicians measured 100 adults' blood pressure using two different arm positions: parallel to the body (along the side) and perpendicular to the body (straight out). Readings in the parallel position were up to 10 percent higher than those in the perpendicular position, regardless of whether the patient was standing, sitting, or lying down. Explain the possible cause for the difference.
Express Pascal's law, and give a real-world example of it.
A vertical, frictionless piston-cylinder device contains a gas at \(180 \mathrm{kPa}\) absolute pressure. The atmospheric pressure outside is \(100 \mathrm{kPa}\), and the piston area is \(25 \mathrm{cm}^{2}\) Determine the mass of the piston.
Consider a U-tube whose arms are open to the atmosphere. Now equal volumes of water and light oil \((\rho=\) \(49.3 \mathrm{lbm} / \mathrm{ft}^{3}\) ) are poured from different arms. A person blows from the oil side of the U-tube until the contact surface of the two fluids moves to the bottom of the U-tube, and thus the liquid levels in the two arms are the same. If the fluid height in each arm is 30 in, determine the gage pressure the person exerts on the oil by blowing.
A 3 -kg plastic tank that has a volume of \(0.2 \mathrm{m}^{3}\) is filled with liquid water. Assuming the density of water is \(1000 \mathrm{kg} / \mathrm{m}^{3},\) determine the weight of the combined system.
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