2 years ago

How many molecules of Oxygen gas are there on the reactant side of this equation?

Physics

1 answer:

Sergeeva-Olga [200]2 years ago

8 0

Answer:

Explanation:

It has 8 O atoms and 4 O2(g) molecules

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A bowling ball with a mass of 9kg is thrown down a lane with a constant speed of 3 m/s. The ball hits the 1.5kg pin, initially a

olasank [31]

Answer:

M1 V1 = M1 V2 + M2 V3 conservation of momentum

V2 = (M1 V1 - M2 V3) / M1 where V2 = speed of M1 after impact

V2 = (3 * 9 - 1.5 * 5) / 9 = (27 - 7.5) / 9 = 2.17 m/s

Note: All speeds are in the same direction and have the same sign

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2 years ago

Describe a situation when you might travel at a high velocity, but with low acceleration

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Reading a book in your warm, comfy seat ... in Row-27 of a
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3 years ago

If the lights are off in a room and there are no windows, why do most objects appear black?

julsineya [31]

Because there are no windows.

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3 years ago

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During World War II, mass spectrometers were used to separate the radioactive uranium isotope U-235 from its far more common iso

mariarad [96]

Answer:

21.55 m

Explanation:

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3 years ago

A right-circular cylindrical tank of height 8 ft and radius 4 ft is laying horizontally and is full of fuel weighing 52 lb/ft3

tresset_1 [31]

Given:

Height of tank = 8 ft

and we need to pump fuel weighing 52 lb/ $ft^{3}$ to a height of 13 ft above the tank top

Solution:

Total height = 8+13 =21 ft

pumping dist = 21 - y

Area of cross-section = $\pi r^{2}$ = $\pi 4^{2}$ =16 $\pi$ $ft^{2}$

Now,

Work done required = $\int_{0}^{8} 52\times 16\pi (21 - y)dy$

= $832\pi \int_{0}^{8} (21 - y)dy$

= 832 $\pi($ $[ 21y ]_{0}^{8} - [\frac{y^{2}}{2}]_{0}^{8}\\$ )

= 113152 $\pi$ = 355477 ft-lb

Therefore work required to pump the fuel is 355477 ft-lb

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4 years ago