Explanation:
Below is an attachment containing the solution.
Here's all the Physics you have to know
in order to answer this question:
==> Acceleration = (change in speed) / (time for the change)
That's it. Now let's work on it with the numbers from the train.
Change in speed = (speed at the end) - (speed at the beginning)
For the train, speed at the beginning is zero, so the change is 72 km/h .
Time for the change = 5 minutes.
Acceleration = (72 km/hr) / (5 minutes)
Acceleration = 14.4 km per hour per minute .
That answer is 100% true and correct, but it has a weird,
awkward unit.
Anybody you show it to would probably want to see it with
a more familiar unit, like "meters per second per second"
like the unit that we use for the acceleration of gravity.
It's pretty easy to change units, and it doesn't even take
any Physics. All it takes is Arithmetic.
So far, we have Acceleration = 14.4 km/hr·minute
Multiply that by (1000 meter/km)
Then multiply it by (1 hour/60 minutes).
Then multiply it by (1 minute/60 seconds)².
All of these fractions are equal to ' 1 ', because each top number
is equal to each bottom number. So they won't change the VALUE
of the answer. They'll just change the units.
(14.4km/hr·minute)·(1000m/km)·(1 hour/60minutes)·(1 minute/60seconds)²
= (14.4·1000 / 60·60·60) · (km·meter·hr·min·min / hr·min·km·min·sec·sec)
= 0.0667 meter/second²
With similar methods, it could be changed to other units:
-- 6.67 centimeter/second²
-- 66.7 millimeter/second²
-- 240 meter/minute²
-- 864 km/hour²
These are all THE SAME NUMBER, only with different units.
Answer:
It goes upward and downward
Explanation:
The way the man is moving the string indicates it goes movement of up and sown, I believe the straight line(B) is a distraction.
Answer:
D) Synthesizers have always had a well-established presence in standard ensembles
Explanation:
As synthesizers are electronic music instruments that can create the sounds of many different musical instruments, they have been seen as a threat to many musicians since their invention.
Answer:
a)
b)
c)
Explanation:
We use the definition of a electric field produced by a point charge:
<u>a)Electric Field due to the alpha particle:</u>
<u>b)Electric Field due to electron:</u>
<u>c)Electric Force on the alpha particle, on the electron:</u>
The alpha particle and electron feel the same force but with opposite direction:
