Answer: Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet.
Explanation:
Iron accounts for about 86% of the Earth's core and Silicon is next at only 6%. Iron is by far the most abundant element in the Earth's core.
These are called resistors.
Answer: Metals:-
1) Gold
2) Silver
3) Iron
4) Copper
5) Nickel
6) Aluminum
7)Mercury( Liquid metal)
8) Titanium
9) Radium
10) Californium
Non-metals:-
1) Diamond
2) Sulphur
3) Graphite
4) Carbon
5) Iodine
6) Tincture
7) Bromine (liquid non-metal)
8) Phosphorus
9) Silicon
10) Boron
Hope this helps..... Stay safe and have a Merry Christmas!!!!!!!! :D
Explanation:
Answer:
43.96secs
Explanation:
M1 = molar mass of NH3 = 14 + (3x1) = 14 + 3 = 17g/mol
t1 = time for NH3 to diffuse = 30secs
M2 = molar mass of HCl = 1 + 35.5 = 36.5g/mol
t2 = time for HCl to diffuse =?
From Graham's law of diffusion:
t2/t1 = √(M2/M1)
t2/30 = √(36.5/17)
t2/30 = 1.465
Cross multiply
t2 = 30 x 1.465
t2 = 43.96secs
Therefore it will take 43.96secs for the damp blue litmus paper to change colour for HCl.