A football is kicked at an angle, giving it a horizontal velocity of 25 m/s. At the highest point in its path, the football will have a velocity of ________ m/s and a horizontal acceleration of ________ m/s2.
What will be an ideal response?
25 and zero
25 and 0
twenty-five and zero
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You are asked to design a metal alloy for use in salt water. The most important design parameter is corrosion resistance followed by other mechanical properties such as yield strength. It is known that dissimilar metals in contact in salt water can result in corrosion of one of the materials. What type of metal alloy phase diagrams should you consider first for this application?
(a) Continuous solid solution (b) Eutectic (c) Compound formation (d) Peritectic
The root-mean-square speed (thermal speed) of the molecules of a gas is 200 m/s at 23.0°C. At 227°C the root-mean-square speed (thermal speed) of the molecules will be closest to
A) 160 m/s. B) 330 m/s. C) 260 m/s. D) 630 m/s. E) 2000 m/s.
An area of 100 cm2 is how many square meters?
A) 1.00 B) 1.00 × 102 C) 1.00 × 10-2 D) 1.00 × 104 E) 1.00 × 10-3
Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand, the body must give back energy to warm it up to body temperature (37°C). Assuming ice cream has similar thermal properties to water:
(a) 1/2 kg produces how much energy? (b) 1/2 kg absorbs how much energy to reach 37°C? (c) What is the net gain or loss (eating 1/2 kg ice cream)?