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3 years ago

5

How does thermal energy transfer when a room is heated by a furnace?

1 answer:

Anna007 [38]3 years ago

5 0

The answer is B,This is an example of convection, where fluid will circulate.This is because when part of air is warmed up, they expand and become less dense then rise,Therefore, the colder air contracts and become denser and sinks, in order to take in the place of the warm air. This phrase circulates and therefore the it can transfer heat a lot more faster.

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1. The speed limit on most city streets is (25 miles). How many meters per minute

irina1246 [14]

Answer:

$Speed = 670.56 \frac{m}{min}$

Explanation:

Given

$Speed = \frac{25 mi}{hr}$

Required

Convert to meters per minutes

$Speed = \frac{25 mi}{hr}$

Start by converting the speed from miles to meters

$1\ mile = 1609.34\ meters.$

So, we have:

$Speed = \frac{25 * 1609.34\ m}{hr}$

$Speed = \frac{40233.5\ m}{hr}$

Next, we convert time from hours to minutes

$1\ hour = 60\ minutes$

So, we have:

$Speed = \frac{40233.5\ m}{60\ min}$

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<em>Hence, the equivalent of 25 miles per hour is 670.56 meters per minutes</em>

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3 years ago

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2 years ago

A student carries out the same titration but uses an indicator instead of a pH meter. If the indicator changes color slightly pa

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Answer:

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If the student has gone slightly past the equivalence point, they have added too much base.

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The calculated concentration of acid will also be too high.

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