It’s false , NS still happens to this day
Answer: a) The density of the jewelry will be
b) The element is silver.
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of jewelry = 132.6 grams
Volume of jewelry = volume of water displaced =
Putting in the values we get:
Thus density of the jewelry will be 
As density is characteristic of a particular material , the material must be silver which has a density of 10.5 g/ml.
The element that has a complete valence electron shell is argon (Ar) since it is a noble gas in the last group on the periodic table.
Answer:
0.25 g of U-235 isotope will left .
Formula used :
where,
N = amount of U-235 left after n-half lives = ?
= Initial amount of the U-235 = 1.00 g
n = number of half lives passed = 2
0.25 g of U-235 isotope will left .
Answer: operating machines they are easy to handle