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2 years ago

What does the letter I represent?

Physics

1 answer:

irina [24]2 years ago

6 0

The letter i is used to signify that a number is an imaginary number. It stand for the square root of negative one.

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The lowest note on the piano has the longest string to vibrate. How does the lowest note compare if you consider the column of a

SashulF [63]

The piano strings for low notes are heavier, have more inertia, and vibrate at a lower frequency a lower pitch than lighter strings of the same string tension. Loudness involves how hard the keys are struck, which affects the amplitudes of the vibrating strings. the touch sensitivity of the piano distinguishes it from earlier.

Do you undertand?????

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4 years ago

If you have 2-2,000 kg trucks and you apply the same force to the both of them which will stop first

Y_Kistochka [10]

They will stop at the same time

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4 years ago

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Fluency means that

dalvyx [7]

Answer:

a. you speak clearly and well

Explanation:

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3 years ago

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A grapefruit falls from a tree and hits the ground 0.72 s later.

xxTIMURxx [149]

Answer:

The grapefruit dropped 2.54 m and hit the ground at 7.06 m/s

Explanation:

Free Fall Motion

A free-falling object falls under the sole influence of gravity. Any object that is being acted upon only by the force of gravity is said to be in a state of free fall. Free-falling objects do not encounter air resistance.

If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is $g = 9.8 m/s^2.$

The final velocity of a free-falling object after a time t is given by:

vf=g.t

The distance traveled by a dropped object is:

$\displaystyle y=\frac{gt^2}{2}$

Given a grapefruit free falls from a tree and hits the ground t=0.72 s later, we can calculate the height it fell from:

$\displaystyle y=\frac{9.8\cdot 0.72^2}{2}$

y = 2.54 m

The final speed is computed below:

$vf=9.8\cdot 0.72$

vf = 7.06 m/s

The grapefruit dropped 2.54 m and hit the ground at 7.06 m/s

6 0

3 years ago

Differentiate can you help me plzzzzzzz

Schach [20]

Explanation:

Acceleration and the other term are the same physical phenomenon - just with opposite affects. Acceleration increases velocity, while the other term that begins with the letter "R" reduces.

***(Brainly's language filter is blocking the use of the second term in my answer.)***

Acceleration is defined as the rate of change of the velocity of an object per unit of time...

$a = \frac{dv}{dt}$

Acceleration would be a POSITIVE (+) quantity, while the r-word would be negative (-).

4 0

3 years ago