Answer:
<span>GPE=81000J or 81kJ</span>
Explanation
Potential Energy = mgh = 20 x 9.8 x ?
<span>To find H use one of the equation of motion </span>
<span>= [(90)^2 - 0 ] / 2(9.8) </span>
<span>Potential Energy = mgh = 20 x 9.8 x 8100 /2(9.8) = 81000 J</span>
Gamma Rays Hope This Helps
If the net force is zero, then there is no acceleration, which means no change in velocity. The velocity starts at zero, so it must remain at zero. Therefore, the object will not move.
Answer:
Element
Explanation:
The Number 1 which is Ca is a calcium element that is taking part in the chemical combination.
An element is a substance made up of one kind of atom.
Calcium is an element belong to the alkali earth metals. These group of elements are found on the second group of the periodic table.
- Calcium is a metal and it is a member of the s-block on the periodic table.
- It is combining with 2 moles of water in this chemical reaction.
- Calcium is made up of two valence electrons in its outermost shell.
D. Sulfur atoms in the air react with oxygen and water in moist air to make acid rain so I would think it’s D
