Discuss the living and non-living factors that change mountains over time.

What is 20+2<br> this is to pay someone back

alukav5142 [94]

The answer to this question is 22.

6 0

3 years ago

Which scale factors produce a contraction under a dilation of the original image? select each correct answer. −2 −12 12 2.

vitfil [10]

Answer:

-2 and -12

Explanation:

A dilation is a transformation of a geometric image that is known to change its size not it shape.

The size of the figure basically depends on the scale factor (k).

When k >1 then there would be expansion.

When k <1 then there would be contraction.

When k=1 then no change in size

I.e for conraction the scale factor (k) must be negative

from the given options, the scale factor produce a contraction under a dilation of the original image would be -2 and -12

<h3 /><h3>Hence the correct answers are:-2 and -12 </h3>

Hope I helped

6 0

2 years ago

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

How do snails and clams differ from grasshoppers and dragonflies.

kari74 [83]

Answer:

Snails and clams have hard shells while grasshoppers and dragonflies have none. Snails and clams have soft spines while grasshoppers and dragonflies have none.

Explanation:

7 0

2 years ago

A 0. 2 kg rubber ball is dropped from the window of a building.

nikklg [1K]

Answer:

200grams rubber ball is dropped from the window of a building

7 0

2 years ago