The answer is B, lithium would become positive and bromium would become negative.
The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another. Another way of stating this law of chemistry is to say the total energy of an isolated system remains constant or is conserved within a given frame of reference.
In classical mechanics, conservation of mass and conversation of energy are considered to be two separate laws. However, in special relativity, matter may be converted into energy and vice versa, according to the famous equation E = mc2. Thus, it's more appropriate to say mass-energy is conserved.
Example of Conservation of Energy
If a stick of dynamite explodes, for example, the chemical energy contained within the dynamite changes into kinetic energy, heat, and light. If all this energy is added together, it will equal the starting chemical energy value.
Answer:
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Explanation:
A force of 500N acts on the area of 2.5m2; calculate the pressure
exerted,
(Ans: 200 Pa]
b. Calculate the force applied when 400 Pa of pressure is exerted by a box
of surface area 2m2.
(Ans: 800 N]
The weight of a stone is 1400N. If it exerts a pressure of 700 Pa, calculate
the area.
(Ans: 2m]
d. A force of 2000 N acts on 5m² surface area. Calculate the pressure
exerted.
(Ans: 400 Pa]
c.
Answer:
1.11 s.
Explanation:
From the question given above, the following data were obtained:
Height (H) = 6 m
Acceleration due to gravity (g) = 9.8 m/s²
Time (t) =.?
The time taken for the branch to hit the ground can be obtained as follow:
H = ½gt²
6 = ½ × 9.8 × t²
6 = 4.9 × t²
Divide both side by 4.9
t² = 6/4.9
Take the square root of both side
t = √(6/4.9)
t = 1.11 s
Therefore, it will take 1.11 s for the branch to hit the ground.
Answer: 
Explanation:
The angular diameter 
of a spherical object is given by the following formula:
Where:
is the actual diameter
is the distance to the spherical object
Hence:
This is the angular diameter
