Answer:
.b.Be faster, less power consuming than silicon and much thinner
Explanation:
Graphene has a <em>very high electrical conductivity</em> due to its pi orbitals overlap that enhance the carbon to carbon bonds. This means that a nanoelectronic devise that uses graphene will be faster and will consume less powe and it will be thinner because graphenes have a <em>size of 0.345Nm.</em>
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B
Potential energy is the energy intrinsic of an object due to its relative position or motion, charge it holds, or stress within itself.
Explanation:
The water at the top of the hill can do work, when compared to the water at the bottom of the hill, because it is capable of acceleration, by gravity, down the hill and this kinetic energy can then be used to turn turbines to produce electricity. The higher the elevation of the summit of the hill the higher the potential energy of the water at the top. The potential difference is the difference in potential energy of the water at the top and that at the bottom (which translates to the height of the hill).
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Answer: 65mph, 75mph
Explanation:
Let us assume x to be the speed of the slower train, in mph (miles per hour).
Then the speed of the other train is (x+10) mph, according to the question.
We then would have an equation like this
1.6x + 1.6(x+10) = 224.
This is because, the first addend in the left side is the distance covered by the slower train.
The second addend in the left side is the distance covered by the faster train.
The sum is 224 miles, because they together covered all the distance to the moment when they meet each other.
1.6x + 1.6x + 16 = 224
3.2x + 16 = 224
3.2x = 224 - 16
3 2x = 208
x = 208/3.2
x = 65
Thus the speed of the slower train is 65mph, and that of the other train is 65 + 10 = 75mph
Hi,
The goal of a theory is <u>to explain natural and physical </u><u>phenomena.</u>
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(Answered by Benjemin)
The problem can be solve using the formula:
q = m Cp T
where q is the heat added to the substance
m is the mass of the substance
Cp is the specific of the substance
T is the change in temperature of the subtance
q = m Cp T
515 = m ( 4.18 ) ( 20)
m = 515 / ( 4.18) ( 20 )
m = 6.16 g of water