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2 years ago

What are some adaptations polar bears have developed for survival in the tundra? (Site 1)

SAT

1 answer:

NemiM [27]2 years ago

5 0

Answer:

a white appearance.thifk layers of fat and fur.a small surface area to volume ratio. greasy coat that sheds water after swimming

Explanation:

1.as camouflage from prey on the snow and ice.2.for insulation against the cold.3. to minimize heat loss.4.go help reduce heat loss

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Which of the following scenarios represents a nonscientific approach to landfills?

Tresset [83]

C) leaving the landfill open so animals can help consume the waste

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2 years ago

A technology store sells tablets and

IRINA_888 [86]

The combination that could be the total sales would be 360 tablets and 180 computers.

<h3>Total sales</h3>

Over 300 total sales were made in January

100 tablets and 20 computers were sold in February.

This means that total sales would be: (300+) 100 + 20 = 420+

Only options B and C have 420+ total sales.

But, there are more tablet sales than computers.

Thus, we are left with only option B

More on total sales can be found here: brainly.com/question/14119360

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2 years ago

Which chemical formula represents a polyatomic ion brainly.

vichka [17]

Answer:

CIO-

Explanation:

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2 years ago

Making changes in the dna of an organism is called.

stiks02 [169]

Making changes in the dna of organism is called mutation

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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: