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3 years ago

Convert 11 ppm into a percent

Physics

1 answer:

Tanya [424]3 years ago

7 0

To convert ppm to percent, you divide the ppm by 10,000.

x / 10000 = x%

So, 11 ppm is 11/10000 or 0.0011%.

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(03.02 MC) Two students made the following statements to describe atmospheric conditions at a location. Student A: This area has

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Answer:

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Explanation:

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3 years ago

A gaseous refrigerant undergoes compression when 150 j of work is done on it. if the internal energy of the gas increases by 120

zhenek [66]

The heat transferred is -30J

When the gas undergoes compression, work is done on the gas and its internal energy increases.

According to the first law of thermodynamics, the increase in internal energyΔU is the sum of the heat given to the gas ΔQ and the amount of work done on the gas ΔW

$\Delta U=\Delta Q +\Delta W$

The work done on the gas is 150 J due to compression and the internal energy of the gas increases by 120 J.

Therefore, the heat given to the gas is given by,

$\Delta Q =\Delta U -\Delta W\\ =120 J -150 J\\ =-30 J$

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3 years ago

Problem: The frequency of an FM radio station is 89.3 MHz. Calculate its period. Part B: From the Library, select the general eq

vekshin1

Answer:

Time period, $T=1.11\times 10^{-8}\ s$

Explanation:

We have,

The frequency of an FM radio station is 89.3 MHz.

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The reciprocal of frequency is called time period of a wave. It can be given by :

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2 years ago

In the design of wall and column forms, the two most important factors are which of the following? a. rate of placement of the c

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when designing for wall and column form-works, it is of utmost important to know the length of the wall and the type of concrete placement to be used.

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if the concrete placement is manually (hand or funnel) the form work height should not be more than 1 m to enable easy compaction and vibration of concrete in the form.

Also, if the form work length is too long and it is not well reinforced, it tends to burg if the force apply during concrete placement or during vibration is much.

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3 years ago

At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.5 m/s2. At the same insta

Licemer1 [7]

Answer:

6.96 s

Explanation:

<u>Given:</u>

u = initial speed of the automobile = 0 m/s

a = constant acceleration of the automobile = $2.5\ m/s^2$
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<u>Assume:</u>

t = time instant at which the automobile overtakes the truck.

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$\therefore \textrm{Distance traveled by the automobile }=\textrm{Distance traveled by the truck}\\\Rightarrow ut+\dfrac{1}{2}at^2=vt\\\Rightarrow (0)t+\dfrac{1}{2}\times 2.5\times t^2=8.7t\\\Rightarrow 1.25t^2=8.7t\\\Rightarrow 1.25t^2-8.7t=0\\\Rightarrow t(1.25t-8.7)=0\\\Rightarrow t = 0\,\,\,or\,\,\, t = \dfrac{8.7}{1.25}\\\Rightarrow t = 0\,\,\,or\,\,\, t = 6.96\\$

Since t = 0 s is the initial condition. So, they both meet again at t = 6.96 s such that the automobile overtakes the truck.

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3 years ago