Why do scientists think tiny quantum ripples should have been present in the very early universe?
A) The shock wave of the Big Bang caused ripples that expanded outward with time.
B) The energy released when the strong force froze out of the GUT force caused shock waves that produced ripples in the universe.
C) Matter and antimatter particles that spontaneously formed from high-energy photons caused disruptions in the radiation field.
D) The annihilation of matter and antimatter particles caused tiny explosions that disrupted the radiation field.
E) Quantum mechanics tells us that the energy fields at any point in space be continually fluctuating as a result of the uncertainty principle.
E) Quantum mechanics tells us that the energy fields at any point in space be continually fluctuating as a result of the uncertainty principle.
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Frequency and amplitude are independent of each other.
Answer the following statement(s) true (T) or false (F)
Mass on a Spring: An object of mass 6.8 kg is attached to an ideal spring of force constant (spring constant) 1720 N/m. The object is set into simple harmonic motion, with an initial velocity of vo = 4.1 m/s and an initial displacement of x0 = 0.11 m. Calculate the maximum speed the object races during its motion.
Fill in the blank(s) with the appropriate word(s).
Star X has an apparent magnitude of 6, and star Y has an apparent magnitude of 2. How do they compare in observed brightness?
A) Star X appears brighter in the night sky than star Y. B) Star Y appears brighter in the night sky than star X. C) Star X is farther away from us than star Y. D) Star Y is farther away from us than star X.
The flow rate of blood through the average human aorta, of radius 0.95 cm, is about 90 cm3/s. What is the speed of the blood flow through the aorta?
a. 14 cm/s b. 32 cm/s c. 37 cm/s d. 32 cm/s