Explain why aluminum cans won out in the beverage wars even though steel cans cost less energy per use to make
What will be an ideal response?
This probably occurred because of the cost of transportation, which was greater
for steel cans, and because steel cans changed the taste of beer (and presumably other
drinks, though it was less obvious). The beer bottlers adopted aluminum cans and because
of economies of scale, other bottlers did as well.
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The heating element of a toaster is a 5.4-m length of nichrome wire of diameter 0.48 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ? ? m
The toaster is designed to operate at a voltage of 120 V. How much power does it draw in normal operation? A) 370 W B) 360 W C) 380 W D) 400 W E) 410 W
Convert 14°F to K
A) 263 K B) 287 K C) 163 K D) -10 K E) 474 K
A rod of length L is pivoted about its left end and has a force F applied perpendicular to the other end. The force F is now removed and another force F¢ is applied at the midpoint of the rod. If F¢ is at an angle of 30o with respect to the rod, what is its magnitude if the resulting torque is the same as when F was applied?
a. F c. 3F b. 2F d. 4F
Doubling the voltage across a parallel-plate capacitor does not double which of the following?
a. the electric field between the plates c. the energy stored b. the charge d. both a and b