The airways that bring air into the lungs (the trachea and bronchi) are made of smooth muscle and cartilage, allowing the airways to constrict and expand. The lungs and airways bring in fresh, oxygen-enriched air and get rid of waste carbon dioxide made by your cells. They also help in ...
Americans waste 1.2 billion gallons of fuel annually by driving on underinflated tires. To avoid wasting fuel, refer to your owner’s manual to verify that your car’s tire pressure is at the recommended level.
At the ocean's surface, a small — proportion of gases like oxygen and carbon dioxide dissolve into the water — dissolved oxygen, for example, allows sea creatures to breathe.在海水表面，有很小一部分的气体，比如氧气和二氧化碳，溶解在海水中 (举个例子，氧的溶解可以让海洋生物呼吸)。And when t...
one oxygen, and four hydrogen atoms. However, it is still an important chemical. It is used as a raw material to produce a large number of goods we use in our daily lives, like plastics, paints, drugs, fertilizers, and many more [3]. Additionally, methanol can be used to store energy...
the laying of drainage system and detergent used to grow, consume the oxygen in the water, fish died, deterioration of ecosystem. Human activities can make a lot of industrial and agricultural pollutants into the water, the water is polluted. The world each year about 4200 sewage into the riv...
Lighting An Electric BBQ To Turn On A Weber Gas Grill Lighting an electric grill is straightforward. You don’t have to use any fuel or lighting; you plug the grill into an attachment, turn the regulator to ‘high’ and let it heat for 25 minutes with the cover on. Soon the grill is...
How do the plants in a rainforest contribute to the water cycle? How do plants turn sunlight into energy? How is carbon reintroduced into the atmosphere? How does a carbon dioxide laser work? How is oxygen produced commercially? How do organisms contribute to the carbon cycle?
It is possible to go as high as 16,000 feet (4,900 meters) without supplemental oxygen, giving the jumper up to 75 seconds of free fall. When the plane is lined up properly over the jump site, the skydivers jump out of the plane. At about 2,500 feet (760 meters), the skydiver...
By providing hydrophobic islands as preferential nucleation sites on the surface of the electrode, it is possible to nucleate and grow bubbles outside of the pore space, facilitating their release into the electrolyte. Bubbles that grow at preferential nucleation sites act as a sink for dissolved ...
5, each paper are double-sided printing, double-sided writing, equivalent to retain the second half of the forest of originally will be cut off;6, no one or no necessary, do not turn on the light, do not use air conditioning.Third, green travel 1, considering the bus do ...