1. radiation
2. convection
3. condunction
Answer:
First statement:
Energy can neither be created nor destroyed.
Second statement:
Energy can be converted from one form to another.
Explanation:
According to the law of conservation of energy:energy can neither be created nor destroyed but can be converted from one form to another
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Oxygen has 8 electrons
This means its electronic structure will be 2.6
So it has 6 electrons in its outer shell which means it needs to GAIN 2 electrons so it is stable
Once it gains the 2 electrons, it will have a charge of 2- because it has gained 2 electrons and electrons are negatively charged.
So an ionised oxygen atom will have a charge of 2-
Answer:
F = 1.6*10⁴ N
Explanation:
Given distance x = 0.15m, mass m = 1200kg, velocity v = 2m/s.
Unknown: force F
Force is given by Newton's law:
(1) 
The average force to stop an object from a velocity will be the same force necessary to accelerate an object from rest to the same velocity.
The distance for an object starting from rest for a constant acceleration is given by:
(2) 
The velocity for an object starting from rest for a constant acceleration:
(3) 
Using equation 2 and 3 to eliminate time t:
(4) 
Solving equation 4 for the acceleration a:
(5) 
Using equation1 to solve for the force F:
(6) 
