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3 years ago

A. What evidence have you discovered to explain how

Physics

2 answers:

frozen [14]3 years ago

7 0

Answer:

The change in ice alters the color of the lake surface — ice and snow cover are generally white, while the lake water itself is a deep blue.

Explanation:

hope it help

svp [43]3 years ago

3 0

Answer:

Well if it gets warmer the ice will weaken and if it gets hot enough will melt. Of course if the weather gets colder the ice will thicken.

Explanation:

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How much heat energy is needed to raise the temperature of 2.0 kg of concrete from 10c to 30c

kompoz [17]

50 because read step by step explanation

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3 years ago

A system does 506 kj of work, and loses 266 kj of heat to the surroundings. what is the change in internal energy of the system?

babunello [35]

Answer:

The change in internal energy of the system = -772kJ

Explanation:

Given :

Heat lost by the system , a = -266KJ

Workdone by the system, W = -506KJ

The first law of thermodynamics states that:

Change in internal energy = q + w

Substituting values into the equation

Change in internal energy = (-266KJ) + (-506KJ)

Change in internal energy = -722KJ

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3 years ago

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Please someone derive 3rd equation of motion u- v= 2sa

zlopas [31]

We know

$\\ \sf\longmapsto a=\dfrac{dv}{dt}$

$\\ \sf\longmapsto a=\dfrac{dv}{dx}.\dfrac{dx}{dt}$

$\\ \sf\longmapsto a=v\dfrac{dv}{dx}$

$\\ \sf\longmapsto adx=vdv$

Integrate

$\\ \sf\longmapsto a{\displaystyle{\int}^x_{x_0}}dx=\displaystyle{\int}_u^v vdv$

$\\ \sf\longmapsto a(x-x_0)=\dfrac{v^2-u^2}{2}$

Here

x-x_0=s

$\\ \sf\longmapsto v^2-u^2=2as$

6 0

3 years ago

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Identify the stages of the water cycle where water moves downward from the force of gravity

hoa [83]

Umm I think that it's called a run off! Because it's running off of a surface into water.

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3 years ago

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During a spring tide, what is arrangement of the moon, the sun and the earth?.

Solnce55 [7]

Explanation:

Spring tides generally occur twice a month—during new and full moons, when the Earth, Sun, and Moon line up in a row. In this arrangement, the gravities of the Sun and Moon work together and have the strongest pull on Earth. This produces the largest difference between high and low tide.

Spring Tides

During full moon or new moon phases, the gravitational forces of the Sun and Moon are maximized, producing very large ranges of tidal highs and lows called spring tides

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3 years ago