Answer:
Catastrophic theories
Explanation:
The theory of catastrophe is a collection of methods used to analyze and describe the ways in which a system can experience sudden significant behavioral changes when one or more of the variables that govern it are continuously modified.
Georges Louis de Buffon suggested in 1745 the first destructive theory — that a comet pulled material from the Sun to form the planets.
Therefore the answer is -
Catastrophic theories
The indian ocean is the third largest ocean at 68,556,000 sq km
This question involves the concept of Newton's Second Law of Motion.
a) The acceleration is "1 m/s²".
b) The acceleration is "1.5 m/s²".
c) The amount of force needed is "100 N".
d) The force needed is "187.5 N".
e) The force needed is "280 N".
<h3>NEWTON'S SECOND LAW OF MOTION:</h3>
According to Newton's Second Law of motion whenever an unbalanced force is applied on an object, it produces an acceleration in the object in the direction of the force itself.
Mathematically,

where,
- F = Applied Force
- m = mass of the object
- a = acceleration
a)
Here,
Therefore,

<u>a = 1 m/s²</u>
<u></u>
b)
Here,
Therefore,

<u>a = 1.5 m/s²</u>
<u></u>
c)
Here,
Therefore,

<u>a = 100 N</u>
<u></u>
d)
Here,
Therefore,

<u>a = 187.5 N</u>
<u></u>
e)
Here,
Therefore,

<u>a = 280 N</u>
<u></u>
Learn more about Newton's Second Law of motion here:
brainly.com/question/13678295
Answer:
-19.0 kJ
Explanation:
Let's keep in mind that the direction of the resistive force is always opposite to the displacement of the bicyclist.
- In the first part of the ride:
Displacement: d = 1.86 km = 1860 m
Resistive force: F = 5.12 N
Angle between the direction of the force and the displacement: 
So, the work done by the resistive force is

- Similarly, in the second part of the ride:
Displacement: d = 1.86 km = 1860 m
Resistive force: F = 5.12 N
Angle between the direction of the force and the displacement: 
So, the work done by the resistive force is

Therefore, the total work done by the resistive force during the round trip is
