Arrange in order of increasing wavelength: blue, green, indigo, orange, red, violet, yellow
What will be an ideal response?
violet, indigo, blue, green, yellow, orange, red.
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A person weighing 0.70 kN rides in an elevator that has an upward acceleration of 1.5 m/s2 . What is the magnitude of the force of the elevator floor on the person?
a. 0.11 kN b. 0.81 kN c. 0.70 kN d. 0.59 kN e. 0.64 kN
A tank with a volume of 0.200 m3 contains 27.0°C helium gas at a pressure of 63.5 atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27.0°C and absolute pressure of 1.20 atm? Assume all the helium is transferred to the balloons
a. 1180 balloons c. 749 balloons b. 884 balloons d. 375 balloons
Specific Heat: A person running in place on an exercise machine for 10 min uses up 17 kcal (food calories). Another person exercises by repeatedly lifting two 2.5-kg weights a distance of 50 cm. How many repetitions of this exercise are equivalent to 10 minutes of running in place? Assume that the person uses negligible energy in letting down the weights after each lift. (1 cal = 4.186 J)
A. 730 B. 1450 C. 1500 D. 2200 E. 2900
The larger the value of Hubble's constant, the more rapid the expansion of the universe and hence the younger the universe
Indicate whether the statement is true or false