rank the following media from fastest to slowest for a light wave to travel through 1 being fastest 4 being slowest ( a. gas, b.
1 answer:
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The speed of the object is the rate where it changes position relative to the frame of reference. The speed equates to a stipulated speed and motion direction of the item, and the further calculation can be defined as follows:
Given:
To find:
Find the eastward component=?
Solution:
When the angle is north-east, the angle is the east measured
Using formula:
So, the final answer is "45.3155 m/s".
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Answer:
Explanation:
Most of the power developed by the engine is used to compensate for the mechanical energy loss due to frictional forces because these are the only forces on the horizontal direction the automobile is subjected to, besides of that generated by the engine itself. If the automobile is moving at constant speed, then these the force the engine provides is equal to the total friction force acting on the car.
We calculate then the force the engine provides. We know that power relates to work by the equation , and that work relates to force by the equation
, so combining them we have:
Which can be written as:
And since are
, for our values the force the engine provides is:
Which is also then the total friction force acting on the car.