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DedPeter [7]
3 years ago
15

A tightly sealed glass jar is an example of which type of system?

Physics
2 answers:
Katarina [22]3 years ago
7 0
Thermal expansion and contraction, specifically the different coefficients of thermal expansion between glass & metal is a closed system ; D
noname [10]3 years ago
4 0

D. hope it helps. :D

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An airplane travels 4000m in 16 seconds on a heading of 35 whats is its velocity
Marizza181 [45]

In the question, you just gave a complete and detailed
description of the plane's velocity vector:

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You might want to simplify the speed and make it a unit rate,
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6 0
3 years ago
2 ways in which the effects of friction can be minimised in the experiment​
Vlad [161]

Answer:

Friction can be minimized by using lubricants like oil and grease and by using ball bearing between machine parts. A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant. Fluid friction can be minimized by giving suitable shapes to the objects moving in the fluids.

Explanation:

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7 0
2 years ago
a certain projetor uses a concave mirror for projecting an object's image on a screen .it produces on image that is 4 times bigg
IrinaK [193]

Answer:

f = 1 m

Explanation:

The magnification of the lens is given by the formula:

M = \frac{q}{p}

where,

M = Magnification = 4

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p = object distance = ?

Therefore,

4 = \frac{5\ m}{p}\\\\p = \frac{5\ m}{4}\\\\p = 1.25\ m

Now using thin lens formula:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}\\\\\frac{1}{f} = \frac{1}{1.25\ m}+\frac{1}{5\ m}\\\\\frac{1}{f} = 1\ m^{-1}\\\\

<u>f = 1 m</u>

6 0
3 years ago
If you good with science multiple choice
miss Akunina [59]

Answer:

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Explanation:

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nataly862011 [7]
Earths poles are on opposite sides of the earth
7 0
3 years ago
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