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3 years ago

A rectangular gymnasium is 50 m long, 25 m wide and 8.0 m high.

1 answer:

3 0

$\text{Volume,}~V = 50 \times 25 \times 8 = 10000~ m^3\\\\\text{Density,}~\rho = 1.2 ~ kg ~m^{-3}\\ \\\\\text{We know that,}\\\\`~~~~~~~\rho = \dfrac{m}{V}\\\\\implies m = \rho V \\\\\implies m = 1.2 \times 10000 = 12000~kg}\\\\\text{Hence the mass of air is 12000 kg.}$

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You go to the hardware store to buy a new 50 ft garden hose. You find you can choose between hoses of ½ inch and 5/8 inch inner

omeli [17]

To solve this problem it is necessary to consider two concepts. The first of these is the flow rate that can be defined as the volumetric quantity that a channel travels in a given time. The flow rate can also be calculated from the Area and speed, that is,

Q = V*A

Where,

A= Cross-sectional Area

V = Velocity

The second concept related to the calculation of this problem is continuity, which is defined as the proportion that exists between the input channel and the output channel. It is understood as well as the geometric section of entry and exit, defined as,

$Q_1 = Q_2$

$V_1A_1=V_2A_2$

Our values are given as,

$A_1=\frac{1}{2}^2*\pi=0.785 in^2$

$A_2=\frac{5}{8}^2*\pi=1.227 in^2$

Re-arrange the equation to find the first ratio of rates we have:

$\frac{V_1}{V_2}=\frac{A_2}{A_1}$

$\frac{V_1}{V_2}=\frac{1.227}{0.785}$

$\frac{V_1}{V_2}=1.56$

The second ratio of rates is

$\frac{V2}{V1}=\frac{A_1}{A2}$

$\frac{V2}{V1}=\frac{0.785}{1.227}$

$\frac{V2}{V1}=0.640$

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4 years ago

when a student combed his dry hair for a long time, his hair began to stand up. Which of these has Most Likely happend?

blondinia [14]

Sounds like static electricity

6 0

4 years ago

Read 2 more answers

A train travels 94 kilometers in 2 hours, and then 58 kilometers in 4 hours what is it's average speed

Alisiya [41]

The answer to your question 25.333333333

7 0

4 years ago

6 a) A sound wave in a fresh water lake takes 4 s to

Katena32 [7]

Answer:

d=2962 m= 2,962 km

Explanation:

s=2*d, d is the depth

t=4 s

vH2O= 1481 m/s

d=?

s=vH2O*t

s=1481 m/s*4 s

s=5924 m

yields

d=s/2

d=2962 m= 2,962 km

3 0

3 years ago

Which statement about moist air moving over a mountain is correct?

il63 [147K]

Answer:

Explanation:

The orographic effect occurs when air masses are forced to flow over high topography. As air rises over mountains, it cools and water vapor condenses. As a result, it is common for rain to be concentrated on the windward side of mountains, and for rainfall to increase with elevation in the direction of storm tracks.

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3 years ago