Physical Units

Question 1

1au

Answer 1

1.496*10^11 m

Question 2

1 light year

Answer 2

9.46*10^15 m

Question 3

1 parsec

Answer 3

3.26 light year
3.08*10^16 m

Question 4

1 millenium
1000 years

Answer 4

3.16*10^9 sec

Question 5

1ml of water =
1 kg of water =

Answer 5

1g
1kg

Question 6

One second is the time required for the light to propagate _________ m through vacuum

Answer 6

2997 92458 m

Question 7

Time is also different as_______ part of a mean solar day

Answer 7

1/86400 th

Question 8

Mass of the neutron

Answer 8

1.676 *10^-24 g

Question 9

1.676 *10^-24 g equal to

Answer 9

1amu

Question 10

Properties of Neutrons

Answer 10

1. This particle was not found to be deflected by any magnetic or electric field, proving that it is electrically neutral.
2. Its mass is equal to 1.676*10^{-24} g or (1 amu).

Question 11

In 1920 Rutherford predicted the presence of another particle in the nucleus as neutral. _______, the inventor of neutron was student of Rutherford

Answer 11

James Chadwick

Question 12

There are two structural parts of an atom, the nucleus and the empty space in which there are imaginary paths called

Answer 12

orbits

Question 13

Besides the fundamental particles like protons, electrons and neutrons some more particles are discovered in the nucleus of an atom. They include ______

Answer 13

mesons, neutrino, antineutrino, positrons etc.

Question 14

gold atoms have _____ protons

Answer 14

79