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s344n2d4d5 [400]

2 years ago

12

How do you test hydrogen gas

1 answer:

neonofarm [45]2 years ago

4 0

Explanation:

The test for hydrogen consists of holding a burning splint held at the open end of a test tube of gas. If the gas is hydrogen it burns with a loud “squeaky pop” which is the result of the rapid combustion of hydrogen with oxygen to produce water.

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Does the work cause a change in kinetic energy or a potential energy?

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Work cause a change in kinetic energy

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A major source of water pollution comes from that washes chemicals and other pollutants from improperty managed land.

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Which of the following best describes the suns size compared with other stars?

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3 years ago

In a bumper car arena, two cars of equal mass are heading straight toward each other. The orange one is traveling at a speed of

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4 0

2 years ago

The horizontal bar rises at a constant rate of three hundred mm/s causing peg P to ride in the quarter circular slot. When coord

SVETLANKA909090 [29]

Answer:

Explanation:

Given

Horizontal bar rises with 300 mm/s

Let us take the horizontal component of P be

$P_x=rcos\theta$

$P_y=rsin\theta$

where $\theta$ is angle made by horizontal bar with x axis

Velocity at y=150 mm

$150=300sin\theta$

thus $\theta =30^{\circ}$

position of $P_x=rcos\theta =300\cdot cos30=300\times \frac{\sqrt{3}}{2}$

$P_x=259.80 mm$

$P=259.80\hat{i}+150\hat{j}$

Velocity at this instant

$u_x=-rsin\theta =300\times sin30=-150 mm/s$

$u_y=rcos\theta =300\times cos30=259.80 mm/s$

4 0

2 years ago