What fraction of the original uranium-235 should be left after 3.5 billion years?

A) 1/2
B) 1/4
C) 1/8
D) 1/32
E) 1/64


D) 1/32

Physics & Space Science

You might also like to view...

What observational evidence do we have that black holes exist?

What will be an ideal response?

Physics & Space Science

The speed of sound in air is dependent upon the air temperature and other factors. The speed of sound increases from 334 m/s to 341 m/s between 8:00am and 11:00am. If a horn produces sound with wavelength 0.75 m at 8:00am, what would it produce at 11:00am?

A. 73 cm B. 77 cm C. Not enough info given to solve. D. 75 cm

Physics & Space Science

Which of the following rocks would be the first to weather in a humid climate? Which would be the last? Defend your answers. (a) granite (b) sandstone (c) limestone (d) halite

What will be an ideal response?

Physics & Space Science

In Ptolemy's view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle

a. Correct
b. FALSE; Ptolemy put the Sun at the center.
c. FALSE; The planet stays on the deferent circle.
d. FALSE; The Earth is at the center of the epicycle.
e. FALSE; Both c and d are correct.

Physics & Space Science