Energy transfer is not an efficient process.
Explanation:
There is less amount of energy in the top of the energy pyramid than at the bottom because energy transfer is not an efficient process. During the process of energy transferring, some amount is lost and some are converted to other forms of energy.
- The sun is the ultimate source of energy for all life in the solar system.
- When autotrophs takes this energy, they produce food from it.
- They use light energy from the sun to produce chemical energy in food.
- Even this conversion process waste precious amount of energy.
- As one goes up the pyramid, more energy is lost during the process of converting from one form to another.
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Answer:
A) Charging by contact
Explanation:
Transfer of heat by direct contact, Heat energy is conducted from the hotter medium to the cooler medium
Answer: Metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and conduct electricity easily while making metal as good conductor.
the correct answer is a. the ability of electrons to flow throughout the metal.
Explanation:
Venn diagram is a pictorial representation with of circles showing the relation between two finite sets or things. the intersection of two circles conveys the relation between those sets or things.
here in the Venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circles represents the mixture of sand and salt.
<em>so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.</em>
