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3 years ago

Why does it take more time for a larger sample of water to freeze?

2 answers:

3 0

Answer:The greater the amount of water that there is it will take longer for the water to freeze because more heat has to be dissipated into the environment

Explanation:

exis [7]3 years ago

3 0

Answer:

The greater the mass of water, the more heat has to be dissipated into the environment and the longer it will take to freeze. The greater the surface area of the water, the faster the water will lose its heat and freeze.

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A train travels 92 miles in 11 1/2 hours. what is its average speed in miles per hour?

Gnom [1K]

The answer is 8 mph.

5 0

3 years ago

When we double the distance between a source of light and the

FinnZ [79.3K]

When we double the distance between a source of light and the

surface on which it falls, the amount of illumination on the surface

decreases to <em>one fourth (1/4, 0.25))</em> of the original illumination.

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4 years ago

Myth: An organism's kingdom only describes physical characteristics. <br> Fact:<br> Evidence:

Advocard [28]

FACT: An organism's kingdom does not only describe physical characteristics.

Organisms are classified into the different kingdoms based on physical appearance, their function, how they reproduce and how they obtain their food.

EVIDENCE:
Kingdom Plantae: They obtain their food through photosynthesis
Reproduce asexually.
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4 years ago

A football field is about 100 m long. If it takes a person 20 seconds to run its length, how fast (what speed) were they running

leonid [27]

Answer:

Speed, v = 5 m/s

Explanation:

We have,

The length of the football field, l = 100 m

A person takes 20 seconds to run its length.

It is required to find the speed of the person with which he should run. The distance covered divided by time taken is called its velocity.

$v=\dfrac{d}{t}\\\\v=\dfrac{100\ m}{20\ s}\\\\v=5\ m/s$

So, the speed of the person is 5 m/s.

3 0

4 years ago

Pretend you (80 kg) are making repairs on the outside of the International Space Station. You are floating 20 meters away from t

djyliett [7]

Answer:

32 seconds

Explanation:

m1 = 80 kg

m2 = 10 kg

v2 = 5m/s

According to the property of conservation of momentum, assuming that both you and the bag are stationary before the safety rope comes lose:

$m_{1} v_{1} =m_{2} v_{2} \\80v_{1} =10*5 \\v_{1} = 0.625\ m/s$

Since the space station is 20 meters away, the time taken to reach it is given by:

$t = \frac{20}{0.625}\\t=32\ s$

It takes you 32 seconds to reach the station.

7 0

3 years ago