<u>Answer:</u>
A) Mass of dinosaur = 77,000 kg
Weight of dinosaur = 755370 N
B) Mass of dinosaur = 77,000 kg
Weight of dinosaur = 377685 N
<u>Explanation:</u>
A) Mass of dinosaur the brachiosaurus = 77,000 kg
We have weight of body = mg = 77,000*9.81 = 755370 N
B) Mass of a body is constant, it will not get affected by change in acceleration due to gravity value.
So, Mass of dinosaur = 77,000 kg
We have weight of body = mg' = m*g/2 = 77,000*9.81/2 = 377685 N
Answer:
b. The speed of light is 2.99792458 x 10^8 meters/second.
Explanation:
Speed of light is a universal constant and its value is same throughout the universe . So alien living near Alpha Centauri will quickly understand about it . But other statements are not universal . Mass of electron can vary as per relativistic formula of Einstein . Similarly , mass of proton can also vary according to relativistic concept . It depends upon the velocity of particle . So, the ratio of mass of proton and mass of electron will also vary from one star to another .
The second statement is the correct choice. Don't make me type it out.
