It is not smooth or rough surfaces that affects friction. It is the size of the push.
friction occurs because no surface is perfectly smooth.
I really hope this helps otherwise imma look like a complete idiot
Answer:
1. open
2. open
Explanation:
1. An open system can exchange energy and matter.
2. The ocean is known to be an open system.
Dark energy and dark matter seem over analyzed, although they are no different than gravity and wind. Dark energy can be the pulling caused by black holes, stars, and large planets. Dark matter also is just the effect of cosmic dust and debris pushed from explosions but also pulling caused by distant gravitational bodies.
884 pounds of carbon dioxide are emitted in 400 litres.
What is a pound?
The pound is defined as the basic unit for weight in the Foot Pound Second (F.P.S) system and is equal to 16 ounces.
To convert a litre measurement to a pound measurement, multiply the volume by 2.204623 times the density of the ingredient or material. Thus, the volume in pounds is equal to the litres multiplied by 2.204623 times the density of the ingredient or material.
One litre of water weighs approximately 2.21 pounds.
So 400 liter = 400 liter x 2.21 pounds
= 884 pounds
Hence, 884 pounds of carbon dioxide are emitted in 400 litres.
Learn more about the pounds here:
brainly.com/question/4262393
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