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2 years ago

Can anyone explain dimensional analysis pleaseeee

1 answer:

3 0

Is a problem solving method that uses that fact that any number or expression can be multiplied by one without changing it's value.

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PLEASEEE HELP THANK YOU!

Fittoniya [83]

Answer:

Hi Sophia! The answer is the option 3!

Step-by-step explanation:

Check the picture!

8 0

2 years ago

9 millimeters to centimeters

Oxana [17]

9 millimeters= 0.9 centimeters

6 0

2 years ago

Will someone please help me here

stealth61 [152]

You would use unit rate for this. If Austin makes $209 in 11 hours, then he makes 209/11 = 19 dollars in 1 hour.

Then, we can make a proportion:

$19/1 hour = $152/ x hours

Cross multiply:

152 = 19x

Solve for x to get:

x = 8 hours.

6 0

3 years ago

Read 2 more answers

Using Newton's Law of Cooling. You are a medical examiner called to an abandoned house in which a dead body has been discovered.

Artyom0805 [142]

A) The differential equation comes from the fact that the rate of temperature change is proportional to the difference in temperatures.
$\frac{dT}{dt} = \alpha(T -52)$

B) Find general solution by separating variables and integrating $\int\frac{dT}{T-52} = \alpha \int dt \\ ln (T-52) = \alpha t + C \\ T = C e^{\alpha t} +52$ :

C) Initial condition is t=0, T = 87
$87 = C +52 \\ C = 35$

D) Total time elapsed is 10 minutes, new temperature is 84
$84 = 35 e^{10\alpha} +52$
solve for alpha
$e^{10\alpha} =\frac{32}{35} \\ \alpha = \frac{ln(32/35)}{10} \\ \alpha = -.00896$

E) Temperature function is:
$T = 35 e^{-.00896 t} +52$
solving for t
$t = \frac{ln (\frac{T-52}{35})}{-.00896}$
Plug in T = 98.6
$t = -31.95$

This is approximately 32 minutes before he arrived or about 1:20 AM

3 0

2 years ago

Please answer ASAP: All of the following are equivalent except _____.

ahrayia [7]

7x 2. All the other answers equal 7x. The first one would be 49x. I hope this helps love! :)

8 0

2 years ago

Read 2 more answers