WRITE A PARAGRAPH ABOUT PRESSURE
2 answers:
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Answer:
12.72 sec
Explanation:
The time it takes to travel a certain distance can be found by dividing the distance that needs to be travelled by the speed with which you are travelling, therefore...
Acceleration is a change in speed and/or direction
Explanation:
The acceleration of an object is defined as the rate of change of velocity, mathematically:
where
is the change in velocity
is the time taken for the velocity of the object to change
We notice that velocity is a vector quantity, so it consists of:
- A magnitude, which is called speed
- A direction
Since acceleration is the rate of change in velocity, this means that the acceleration is non-zero whenever is non-zero, which means that either the speed AND/OR the direction of the velocity is changing.
For instance:
- For an object which is speeding up along a straight line, the speed is changing but the direction is not --> still, the object is accelerating
- For an object moving in a uniform circular motion, the speed is constant while the direction is changing --> still, the object is accelerating
So the correct answer is
a change in speed and/or direction
Learn more about acceleration:
#LearnwithBrainly
Answer:
Explanation:
Given:
- diameter of hose pipe,
- diameter of nozzle,
- volume flow rate,
<u>Now, flow velocity in hose:</u>
<u>Now, flow velocity in nozzle:</u>
We know the Bernoulli's equation:
when the two points are at same height then the eq. becomes