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Law Incorporation [45]
3 years ago
12

A fireman's water hose shoots 320 kg of water each second against the door of a building. The velocity of the water is 20 m/s an

d the water strikes the door horizontally and doesnt bounce back. What average force is exerted by the stream of water?
Mathematics
1 answer:
NeX [460]3 years ago
3 0

Answer:

6400\ \text{N}

Step-by-step explanation:

\dfrac{m}{t} = Mass flow rate of water = 320 kg/s

m = Mass of water on the door

t = Time

v = Velocity of water on the door = 20 m/s

Force is given by

F=\dfrac{m}{t}v\\\Rightarrow F=320\times 20\\\Rightarrow F=6400\ \text{N}

The average force is exerted by the stream of water is 6400\ \text{N}.

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Step-by-step explanation:

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What is the numerical solution to the equation five less than three times a number equals four more than eight times rhetorical
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3n-5=8n+4

Step-by-step explanation:

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3 years ago
The number of tacks in a 12oz box is normally distributed with a mean of 55 tacks and a standard deviation of 3 tacks. Suppose t
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Determine any data values that are missing from the table, assuming that the data represent a linear function.
Varvara68 [4.7K]

Answer:

c. 14

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Let the missing y value be y2.

If the data represent a linear function, then:

\frac{6 - 2}{2 - 1} = \frac{y_2 - 6}{4 - 2}

\frac{4}{1} = \frac{y_2 - 6}{2}

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Multiply both sides by 2

4 \times 2 = \frac{y_2 - 6}{2} \times 2

8 = y_2 - 6

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6 0
3 years ago
Question 13
ArbitrLikvidat [17]

Answer:

C

Step-by-step explanation:

Here in this question , we are interested in calculating the total distance covered by the train in the 10 minutes that it ran.

From the first part of the question, we already know the distances in the first 5 minutes.

Now, to calculate the total distance in the second 5 minutes, we use the distance formula since we have the average speed and the time;

Mathematically; Total distance = average speed * time

From the question, average speed is 33km/h, while time is 5 minutes. To achieve a consistent unit, we convert 5 minutes to hours.

That would be 5/60 = 1/12 hours

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We simply divide by 1000 = 1250/1000 = 1.25 km

The total distance is thus ;

1.25 + 2.75 = 4 km

4 0
3 years ago
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