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sergeinik [125]

2 years ago

8

A mountain climber starts at the base of a mountain, climbs all the way to the peak, and then climbs back down to the base of th

e mountain. At which point is the climber's gravitational potential energy the greatest?.

1 answer:

fredd [130]2 years ago

7 0

On the way back down:)

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Newton’s law of cooling states that for a cooling substance with initial temperature t0, the temperature t(t) after t minutes ca

antoniya [11.8K]

The cooling rate of the substance is approximately 0.0732.

According to the statement, the Newton's law of cooling is defined by the following formula:

$T(t) = T_{s} + (T_{o}-T_{s})\cdot e^{-k\cdot t}$ (1)

Where:

$T_{s}$ - Final temperature, in degrees Celsius.
$T_{o}$ - Initial temperature, in degrees Celsius.
$t$ - Time, in minutes.
$k$ - Cooling rate, in $\frac{1}{min}$ .
$T(t)$ - Current temperature, in degrees Celsius.

Please notice that substance reaches thermal equilibrium when $T(t) = T_{s}$ , that is when temperature of the substance is equal to the temperature of surrounding air.

If we know that $T_{o} = 80\,^{\circ}C$ , $t = 15\,min$ , $T_{s} = 50\,^{\circ}C$ and $T(15) = 60\,^{\circ}C$ , then the cooling rate of the substance is:

$60 = 50 + (80 - 50)\cdot e^{-15\cdot k}$

$\frac{60-50}{80-50}= e^{-15\cdot k}$

$\frac{1}{3} = e^{-15\cdot k}$

$k = -\frac{1}{15}\cdot \ln \frac{1}{3}$

$k \approx 0.0732$

The cooling rate of the substance is approximately 0.0732.

To learn more on Newton's law of cooling, we kindly invite to check this verified question: brainly.com/question/13748261

7 0

2 years ago

Where you live the income you earn and your educational achievements are part of your

Irina18 [472]

These are all examples of your environment

8 0

2 years ago

A student drops an object from rest above a force plate that records information about the force exerted on the object as a func

Masteriza [31]

The correct answer to what additional measurement the student requires is; D. The student has enough information to make the determination

<h3>Understanding Change in Momentum</h3>

Formula for change in momentum is;

ΔP = m(v - u)

Now, this change in momentum is also equal to impulse which has the formula; Impulse = Force(F) × Time(t)

I = F × t

Thus;

m(v - u) = F × t

Now, we are given;

Force exerted on the object and the time interval. Thus;

ΔP = F × t

Thus, the student has enough information to find the change in momentum

The missing options are;

a. The mass of the object.

b. The final speed of the object MOH 5000

c. The distance fallen by the object

d. The student has enough information to make the determination

Read more about Impulse and Change in momentum at; brainly.com/question/20586658

8 0

2 years ago

Emily text meh bck asap

Aleksandr [31]

Answer:

just text back, my guy

Explanation: plz

6 0

3 years ago

Read 2 more answers

Which chef has become widely known for representing sustainable agriculture in foodservice?

Alexandra [31]

Alice Waters has become widely known for representing sustainable agriculture in foodservice.

Given that the chef has become widely known for representing sustainable agriculture in foodservice.

We are required to tell the name of the chef.

A sustainable agriculture basically seeks to utilize natural resources in such a way that they can regenerate their productive capacity, and also minimize harmful impacts on ecosystems beyond a field's edge.

Alice Louise Waters is basically an American chef, restaurateur, and author. In 1971 she opened Chez Panisse, a Berkeley, California restaurant famous for the role in creating the farm-to-table movement and for pioneering California cuisine.

Hence Alice Waters has become widely known for representing sustainable agriculture in foodservice.

Learn more about sustainable agriculture at brainly.com/question/3640109

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8 0

2 years ago