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3 years ago

Complete the sentence with the word "element" or "compound." O is a(n) and H2O2 is a(n) .

Physics

2 answers:

Debora [2.8K]3 years ago

9 0

O (oxygen) is an element, whereas H2O2 (hydrogen peroxide) is a compound.

jeka943 years ago

8 0

O is an element (Oxygen) and H2O2 is a compound (Hydrogen Peroxide)

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What is the definition of an unbalanced force?

Shtirlitz [24]

<span>an unbalanced force is Forces that are not equal</span>

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3 years ago

Dose mass alone determine weather an object will float or sink?

Inga [223]

If the density of the object is lower than the density of the liquid it is floating in then it will float. if the density is larger it will sink. density is mass/volume

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3 years ago

Please hurry! Only answer if you know the correct answer.

aleksklad [387]

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4 years ago

Calculate the ratio of the drag force on a jet flying at 1190 km/h at an altitude of 7.5 km to the drag force on a prop-driven t

Bond [772]

Answer:

$\frac{D_{jet}}{D_{prop}}=2.865$

Explanation:

Given data

Speed of jet Vjet=1190 km/h

Speed of prop driven Vprop=595 km/h

Height of jet 7.5 km

Height of prop driven transport 3.8 km

Density of Air at height 10 km p7.8=0.53 kg/m³

Density of air at height 3.8 km p3.8=0.74 kg/m³

The drag force is given by:

$D=\frac{1}{2}CpAv^2\\$

The ratio between the drag force on the jet to the drag force on prop-driven transport is then given by:

$\frac{D_{jet}}{D_{prop}}=\frac{(1/2)Cp_{7.5}Av_{jet}^2}{1/2)Cp_{3.8}Av_{prop}^2} \\\frac{D_{jet}}{D_{prop}}=\frac{p_{7.5}v_{jet}^2}{p_{3.8}v_{prop}}\\\frac{D_{jet}}{D_{prop}}=\frac{(0.53)(1190)^2}{(0.74)(595)^2}\\ \frac{D_{jet}}{D_{prop}}=2.865$

4 0

3 years ago

An object with a mass of 78 kg is lifted through a height of 6 meters how much work is done

il63 [147K]

We got the following:
m = 78kg
h = 6m
g = 9.8 m/ $sec^{2}$ ≈ 10 m/ $sec^{2}$
----------------------------------------------------------------------------
A = ?

As we know A = Ep = mgh -> potential energy
so the answer would be A = 78 * 6 * 10 = 4680 Joule

5 0

3 years ago