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3 years ago

9

Distance between Train 1 and Train 2 = 95 miles.

1 answer:

Artist 52 [7]3 years ago

4 0

9514 1404 393

Answer:

19/21 hours, about 54 minutes 17 seconds

Step-by-step explanation:

The time is found from ...

time = distance/speed

time = (95 mi)/(105 mi/h) = 95/105 h = 19/21 h

The trains will meet after 19/21 hours, about 54 minutes, 17 seconds.

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Taya2010 [7]

If it is just the square root of 100-64, it will be 6

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2 years ago

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(-s - 5) + (-2s + 2)

skad [1K]

Answer:

-3s - 3

Step-by-step explanation:

Using PEMDAS you first want to get rid of the parenthesis, but in this case you don't have to change signs or anything because you're simply adding what's in the second parenthesis. From that you want to simplify by combining like terms.

= -s - 5 - 2s + 2

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3 0

3 years ago

Read 2 more answers

Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance

maks197457 [2]

Answer:

The uncertainty in the average speed is 0.134 meters per second.

Step-by-step explanation:

Let be $v(t, x) =\frac{x}{t}$ the average speed function, we calculate the uncertainty in the average speed by total differentials, which is in this case:

$\Delta v = \frac{\partial v}{\partial x}\cdot \Delta x+\frac{\partial v}{\partial t}\cdot \Delta t$

Where:

$\Delta v$ - Uncertainty in the average speed, measured in meters per second.

$\frac{\partial v}{\partial x}$ - Partial derivative of the average speed function with respect to distance, measured in $s^{-1}$ .

$\frac{\partial v}{\partial t}$ - Partial derivative of the average speed function with respect to time, measured in meters per square second.

$\Delta x$ - Uncertainty in distance, measured in meters.

$\Delta t$ - Uncertainty in time, measured in seconds.

Partial derivatives are, respectively:

$\frac{\partial v}{\partial x} = \frac{1}{t}$ , $\frac{\partial v}{\partial t} = - \frac{x}{t^{2}}$

Then, the total differential expression is expanded as:

$\Delta v = \frac{\Delta x}{t}-\frac{x\cdot \Delta t}{t^{2}}$

If we get that $\Delta x = 2.3\,m$ , $t = 6.3\,s$ , $x = 6.1\,m$ and $\Delta t = 1.5\,s$ , the uncertainty in the average speed is:

$\Delta v = \frac{2.3\,m}{6.3\,m}-\frac{(6.1\,m)\cdot (1.5\,s)}{(6.3\,s)^{2}}$

$\Delta v = 0.134\,\frac{m}{s}$

The uncertainty in the average speed is 0.134 meters per second.

8 0

3 years ago

HOW MANY AUTOMOBILE LICENSE PLATES CAN BE MADE IF EACH PLATE

ahrayia [7]

The number of license plates is 11232000

<h3>How to determine the number of license plates?</h3>

The given parameters are:

Characters = 6 i.e. 3 letters and 3 digits

Letters = 3 different letters

Digits = 3 different digits

There are 10 different digits and 26 different letters.

Since each character is different from the other, then we have:

Digits = 10, 9 and 8

Characters = 26, 25 and 24

The number of license plates is then calculated as:

n = 10 * 9 * 8 * 26 * 25 * 24

Evaluate the product

n = 11232000

Hence, the number of license plates is 11232000

Read more about permutation at:

brainly.com/question/11732255

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3 0

1 year ago

Stem question, can you plz tell me 3 types of natural water vapor other that steam, fog, and clouds, thanks.

alisha [4.7K]

Answer:

Smoke, Condensation, mist

Step-by-step explanation:

<3

5 0

3 years ago