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Julli [10]
3 years ago
8

A rectangular certificate has a perimeter of 32 inches. Its area is 63 square inches. What are the dimensions of the certificate

?
Physics
1 answer:
irina1246 [14]3 years ago
3 0
Perimeter = 2 ( L + W )
32 = 2 ( L + W )
16 = L + W
L = 16 - W

Area = L W
63 = L W
63 = (16-W) W
63 = 16W - W²
-W² + 16 W - 63 = 0
By factorizing W = 9 or W = 7
So the dimensions are 7 and 9
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p = 1.6.10^{-19} C

To determine work in joules, potential has to be in Volts, so:

\Delta V=65.10^{-3}V

Then, work is

W=1.6.10^{-19}.65.10^{-3}

W=1.04.10^{-20}

To move a potassium ion from the exterior to the interior of the cell, it is required W=1.04.10^{-20}J of energy.

8 0
3 years ago
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Rearranging the formular to make M the subject of formular

T^2 × 4 pi = G M × r^3

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(1.24^2 × 4 × 3.142) /(6.672×10^-11)(4.11×10^8)^3

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M = 19.32 / 4.63 ×10^15

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6 0
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niobium metal becomes a superconductor when cooled below 9 k. its superconductivity is destroyed when the surface magnetic field
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<h3>What do current and electron actually mean?</h3>

Electron movement is referred to as electron current. The positive terminal receives electrons that are released by the negative terminal. Traditional current, usually referred to as just current, exhibits behavior consistent with positive charge carriers being the source of current flow. Regular current is received at the positive end and then flows to a negative terminal.

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5 0
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What is the equation for determining the value of a specific gas constant using the universal gas constants
maria [59]

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2 years ago
An airplane traveling at one third the speed of sound (i.e., 114 m/s) emits a sound of frequency 3.72 kHz. At what frequency doe
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f=3.72kHz\\v=342m/s\\v_o=0m/s\\v_s=-114m/s

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5 0
3 years ago
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