In grinding a steel knife blade (specific heat = 0.11 cal/g-C°), the metal can get as hot as 400.°C. If the blade has a mass of 80. g,
what is the minimum amount of water needed at 20°C if the water is not to rise above the boiling point when the hot blade is quenched in it?
33 grams
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A temperature of degrees 290 Fahrenheit is equivalent to _____ degrees Celsius
a. 62.6 b. 554.0 c. 143.3 d. 17.0
Collisions between which pairs of objects is likely to be most nearly elastic?
A. A steel ball and a baseball B. Two steel balls C. A steel ball and a cotton ball D. Two baseballs
Some of the energy produced when machines are used is chemical energy, and some energy is lost
What will be an ideal response?
150 kcal of heat raises the temperature of 2.0 kg of material by 400 F°. What is the material's specific heat capacity?
A) 1.35 kcal/kg?C° B) 1.31 kcal/kg?C° C) 0.75 kcal/kg?C° D) 0.34 kcal/kg?C° E) 0.19 kcal/kg?C°