A sled weighs 10.0 kg It is held in place on a frictionless 20.0 degree slope by a rope attached to a stake at the top of the slope. Find the tension in the rope if it is parallel to the slope.
A. 47.9 N
B. 37.4 N
C. 94.1 N
D. 33.5 N
E. 23.8 N
D. 33.5 N
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The room-temperature yield strength of very-low-carbon steel as a function of the square root of the interstitial solid-solution carbon concentration is shown in Figure 7.12.
(a) Evaluate all of the constants in the equation for the tensile yield strength as a function of solid-solution chemical composition. (b) The maximum equilibrium composition of interstitial carbon possible in ferritic iron is 0.0011 atom fraction (af). If an iron-carbon alloy of this composition could be produced at room temperature, what should the yield strength be? You must solve this problem analytically; you can check your result graphically. (c) If the composition of 0.0011 af of carbon is exceeded, the extra carbon forms iron carbide. If a specimen is produced with 0.0015 af of carbon, do you expect the strength to be given by an extension of the line in the figure? Briefly explain your answer.
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Fill in the blank(s) with the appropriate word(s).
If a loaf of bread is compressed its
A) density decreases. B) density increases. C) neither of these