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Contact [7]
3 years ago
12

A technical machinist is asked to build a cubical steel tank that will hold 60L of water.Calculate in meters the smallest possib

le inside length of the tank. Round your answer to the nearest
Physics
1 answer:
den301095 [7]3 years ago
7 0

Answer:

Explanation:

Given

Total volume of tank V=60\ L\approx 60\times 10^{-3}\ m^3

Suppose a is the side of cubical tank

volume of cubical tank a^3

a^3=60\times 10^{-3}

a=3.909\times 10^{-1}\ m

a=0.39\ m

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Horace has invented a unique pair of reading glasses that have two small light bulbs at the bottom wired in series, so that he c
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Answer:

The current drawn by Horace’s reading glasses is 0.8 A.

Explanation:  

Given that,

Resistance of each bulb, R = 2 ohms

Voltage of the system, V = 3.2 volts

These two bulbs are connected in series. The equivalent resistance will be 2 ohms +2 ohms = 4 ohms

Let I is the current drawn by Horace’s reading glasses. Using Ohm's law to find it such that :

V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{3.2}{4}\\\\I=0.8\ A

So, the current drawn by Horace’s reading glasses is 0.8 A.

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3 years ago
Convert 27,549 into scientific notation
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3 years ago
A 2.45 cm tall object is placed in 33.7 cm in front of a convex lens. The focal length
timofeeve [1]

Answer:

-1.65

Explanation:

First of all, we find the position of the image by using the lens equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where:

f is the focal length of the lens

p is the distance of the object from the lens

q is the distance of the image from the lens

For the lens in this problem:

f = 21.0 cm (the focal length of a convex lens is positive)

p = 33.7 cm

Solving for q, we find the position of the image:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{21.0}-\frac{1}{33.7}=0.0179 cm^{-1}\\q=\frac{1}{0.0179}=55.7 cm

Then, the magnification of the image is given by:

M=-\frac{q}{p}

And substituting,

M=-\frac{55.7}{33.7}=-1.65

Which means that the image is inverted (negative sign) and enlarged (because M is larger than 1).

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3 years ago
How many universes out there?​
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Answer:

onlu 1 universe

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2 years ago
Read 2 more answers
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