What did the Wilkinson Microwave Anisotropy Probe (WMAP) measure?
a) differences in the temperature of radiation coming from the Big Bang from different directions
b) the existence of a particle emitted through negative gravity
c) the epoch of the formation of the first stars
d) the existence of low mass dark matter particles
e) the presence of supermassive black holes in the centers of nearly all galaxies
Ans: a) differences in the temperature of radiation coming from the Big Bang from different directions
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a. neutron absorber and heat transfer liquid b. neutron moderator and heat transfer liquid c. neutron moderator and neutron absorber d. neutron absorber and lubricant e. neutron moderator and radiation shield
If you are driving at 30 miles per hour and increase your speed to 60 miles per hour, you quadruple your kinetic energy
Indicate whether the statement is true or false
A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
A. on all three. B. only on the book. C. only on the chair. D. upwards on the chair and downwards on the book. E. only on the objects that you have defined to be part of the system.
Which type of electromagnetic wave has the largest wavelength?
a. gamma rays b. radio waves c. x-rays d. visible light