Among these choices, which is the last thing that happens in the history of the universe?
A) inflationary expansion
B) quarks binding together to form protons and neutrons
C) formation of nuclei of helium
D) the Planck time before which all four forces are unified
E) binding of electrons to nuclei
Ans: E) binding of electrons to nuclei
You might also like to view...
What quantity is defined as the distance divided
by the time? a) acceleration b) velocity c) speed d) vector
A string on a guitar is stretched between two points 35.0 cm apart with a tension of 65.0 N. The mass/length of the string is 0.00400 kg/m. The velocity of wave propagation on the string is
A. 128 m/s. B. 198 m/s. C. 210 m/s. D. 273 m/s. E. 305 m/s.
Which terrestrial planet has the youngest surface?
A. Earth B. Mercury C. Mars D. Venus
The only force acting on a 1.8-kg body as it moves along the x axis is given by Fx = -(3.0x) N, where x is in m. If the velocity of the body at x = 0 is vx = +8.0 m/s, at what value of x will the body have a velocity of +4.0 m/s?
a. 5.7 m b. 5.4 m c. 4.8 m d. 4.1 m e. 6.6 m