Helppp PLZ The density of sodium is 0.97g/cmCUBIC. IF A SAMPLE OF SODIUM HAS A VOLUME OF 2.6CM CUBIC WHAT IS THE MASS OF THE SAMPLE

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The edge length of a a unit cell of calcium crystal is 509.12 pm.

Structure of the Calcium crystals

Calcium crystal has a face center cubic (FCC) structure.

Edge length of the unit cell

The edge length of the unit cell for face center cubic (FCC) structure is given in the following formula;

a = 2r√2

where;

• a is edge length
• r is the radius

a = 2 x 180 x √2

a = 509.12 pm

Thus, the edge length of a a unit cell of calcium crystal is 509.12 pm.

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Answer:

joseph proust took the edge test

Explanation:

The book that influenced Giordano Bruno's idea of an infinite universe was 'De revolutionibus orbium coelestium' by Nicolaus Copernicus. It opposed the geocentric model, leading to Bruno's emphasis on the infinite universe theory. Though banned, the book wielded substantial impact.

The book that Giordano Bruno read, which gave him the idea that the Universe was infinite, was 'De revolutionibus orbium coelestium' ('On the Revolutions of the Heavenly Spheres') written by Nicolaus Copernicus. Belonging to the heliocentric theory, the book challenged the geocentric model in which Earth was at the universe's core. Bruno emphasized the argument of an infinite universe presented in the text, which ultimately got him into trouble with the Inquisition. Despite being banned, its impact on Bruno and scientific thought was significant.

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Earth is a truly unique in its abundance of water. Water is necessary to sustaining life on Earth, and helps tie together the Earth's lands, oceans, and atmosphere into an integrated system. Precipitation, evaporation, freezing and melting and condensation are all part of the hydrological cycle - a never-ending global process of water circulation from clouds to land, to the ocean, and back to the clouds. This cycling of water is intimately linked with energy exchanges among the atmosphere, ocean, and land that determine the Earth's climate and cause much of natural climate variability. The impacts of climate change and variability on the quality of human life occur primarily through changes in the water cycle. As stated in the National Research Council's report on Research Pathways for the Next Decade (NRC, 1999): "Water is at the heart of both the causes and effects of climate change."

The ocean plays a key role in this vital cycle of water. The ocean holds 97% of the total water on the planet; 78% of global precipitation occurs over the ocean, and it is the source of 86% of global evaporation. Besides affecting the amount of atmospheric water vapor and hence rainfall, evaporation from the sea surface is important in the movement of heat in the climate system. Water evaporates from the surface of the ocean, mostly in warm, cloud-free subtropical seas. This cools the surface of the ocean, and the large amount of heat absorbed the ocean partially buffers the greenhouse effect from increasing carbon dioxide and other gases. Water vapor carried by the atmosphere condenses as clouds and falls as rain, mostly in the ITCZ, far from where it evaporated, Condensing water vapor releases latent heat and this drives much of the the atmospheric circulation in the tropics. This latent heat release is an important part of the Earth’s heat balance, and it couples the planet’s energy and water cycles.

The major physical components of the global water cycle include the evaporation from the ocean and land surfaces, the transport of water vapor by the atmosphere, precipitation onto the ocean and land surfaces, the net atmospheric transport of water from land areas to ocean, and the return flow of fresh water from the land back into the ocean. The additional components of oceanic water transport are few, including the mixing of fresh water through the oceanic boundary layer, transport by ocean currents, and sea ice processes. On land the situation is considerably more complex, and includes the deposition of rain and snow on land; water flow in runoff; infiltration of water into the soil and groundwater; storage of water in soil, lakes and streams, and groundwater; polar and glacial ice; and use of water in vegetation and human activities. Illustration of the water cycle showing the ocean, land, mountains, and rivers returning to the ocean. Processes labeled include: precipitation, condensation, evaporation, evaportranspiration (from tree into atmosphere), radiative exchange, surface runoff, ground water and stream flow, infiltration, percolation and soil moisture.

Answer:

An ice cube melts when a person holds it in his hand.

Explanation:

One way to slow down the global climate change is to reduce the use of nonrenewable sources such as fossil fuels because, they release harmful gases that  leads to global warming.

What is global warming?

The increase in the overall atmospheric temperature is called global warming. Global warming is mainly caused by green house gases such as carbon dioxide, methane, oxides of nitrogen etc.

Green house gases intensely absorbs heat energy that radiates out from earth. Thus they trap the temperature in the atmosphere make the planet warmer.

Nonrenewable energy sources such as nuclear reactions, fossil fuels, coal etc. coal and petroleum are highly rich in toxic gases and burning them releases these gases including carbon dioxide and methane to the atmosphere increase the rate of global warming.

Therefore, reducing the use of nonrenewable resources is a good way to slow down the global climate change.

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