The laws of physics are the same in all inertial frames of reference
Indicate whether the statement is true or false
TRUE
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Suppose the ends of a 20-m long steel beam are rigidly clamped at 0°C to prevent expansion. The rail has a cross-sectional area of 15 cm2 . What force does the beam exert when it is heated to 40°C? (asteel = 1.1 × 10^-5/C°, Ysteel = 2.0 × 10^11 N/m2)
a. 2.6 × 10^5 N c. 1.3 × 10^5 N b. 5.6 × 10^4 N d. 6.5 × 10^2 N
Two one-liter containers each contain 10 moles of a gas. The temperature is the same in both containers. Container A holds helium (molecular mass = 4 u), and Container B holds oxygen (molecular mass = 32 u). Which container has the higher pressure and by what factor?
a. Container A has 4 times the pressure of Container B. b. Container A has 8 times the pressure of Container B. c. Both containers have the same pressure. d. More information is needed to answer this question.
The Himalayan Mountains are rugged, jagged peaks and the Appalachians are smooth and rolling. Why is there a difference?
a. The Himalayas are much older and the rocks have begun breaking off. b. The Himalayas are volcanic mountains and the Appalachians are not. c. The Appalachians are much older and have been smoothed by erosion. d. The Appalachians are younger and just started to be thrust upward by plate tectonics. e. a and d
A curved mirror that produces an enlarged image will also have a greater field of view than a plane mirror
a. True b. False Indicate whether the statement is true or false