When humans get hot, they sweat in order to reduce their body temperature. Which of the key properties of life is this an example of?
A) growth and development
B) reproduction
C) response to environment
D) order
C
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The Doppler effect states that the motion of any object can
a. shift the wavelength of spectral lines. b. change the speed of light emitted from the object. c. enhance the chemical composition of the object. d. make the object appear hotter. e. make the object appear cooler.
What is the average translational kinetic energy per molecule of an ideal gas at a temperature of ? The Boltzmann constant is 1.38 × 10-23 J/K
A) 1.7 × 10-21 J B) 8.3 × 10-21 J C) 6.2 × 10-21 J D) 2.1 × 10-21 J E) 4.1 × 10-21 J
What is the most accurate way to determine the distance to a nearby galaxy?
A) stellar parallax B) radar ranging C) Hubble's law D) main sequence fitting E) Cepheid variables
All particles can be classified into
a. Leptons and quarks b. Hadrons and leptons c. Baryons and leptons d. Mesons and Baryons