Assuming that what you typed meant 20 seconds, rather than 2o seconds, the car is travelling at a velocity of 200 meters per second.
Answer:
Solution:
Explanation:
The goal is to solve the system by substitution following these steps:
- 1. Isolate the variable with the smallest coefficient, moving the term with the lowest coefficient so that it is alone one one side
- 2. Divide by the coefficient
- 3. Substitute
- 4. Solve
This is the application of those steps to the given system:
<u>1. Isolate the variable with the smallest coefficient:</u>
<u>2. Divide both sides by the coefficient</u>
<u>3. Substitute</u>
- 3 × [2 - 5D] / 2 + 4D = 5
<u>4. Solve</u>
- Distributive property: multiply 3 with each term inside the brackets
(6 - 15D) / 2 + 4D = 5
- Distributive property: divide each term inside the parenthesis by 2:
3 - 15D/2 + 4D = 5
- Move the number 3 to the right side (addition property of equality)
- 15D/2 + 4D = 5 - 3
- Combine like terms (add the fractions on the left and the constant terms on the right)
[- 15D + 8D] / 2 = 2
[-7D] = 4
D = - 4/7
C = [2 - 5D] / 2 = [2 - 5 (-4/7) ] / 2
C = [2 + 20/7] / 2
C = [14 + 20] / 14
C = 34 / 14
C = 17 / 7
Solution:
Snell's law is defined as “The ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant, for the light of a given colour and for the given pair of media”.
Answer:
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Answer:
The concept of conservation of momentum is applied in the particular case of collisions.
The general equation ig given by,
Where,
The crash occurs at an intersection so we must separate the two speeds by their respective vector: x, y.
In the case of the X axis, we have that the body has a speed = 0, this because it is not the direction in which it travels, therefore
The same analysis must be given for the particular case in the Y direction, where the mass body does not act with its velocity here, therefore:
We have the two components of a velocity vector given by
Get the magnitude,
With a direction given by