How many calories of heat are required to raise the temperature of 4 kg of water from 50°F to the boiling point?
a. 6.5 × 10^5
b. 3.6 × 10^5
c. 15 × 10^5
d. 360
e. 4 × 10^4
b
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Snell's Law: A thin laser beam traveling in air strikes the surface of a glass plate at 41.2° with the normal. In the plate, this beam makes an angle of 22.4° with the normal. What is the speed of light in this glass? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
Compared with the speed of light in a vacuum, the speed of light in the empty space between molecules in glass is
A) more. B) the same. C) less.
Which of the following reaction energies is the most endothermic?
A) 540 kJ/mole B) -540 kJ/mole C) 125 kj/mole D) -125 kJ/mole E) not enough information given
A convex mirror will allow you to see large areas normally hidden from your view
Indicate whether the statement is true or false