This graph provides data on the amount of water needed to grow four different crops, each used to produce ethanol, a fuel. For each crop, the data shows how many liters of water are needed to produce one liter of ethanol fuel. Which of the following would require using the most water? *
Producing 100 L of ethanol from sugar cane
Producing 200 L of ethanol from sugar beet
Producing 300 L of ethanol from potatoes
Producing 400 L of ethanol from corn
Answer:
Producing 300 L of ethanol from potatoes
Explanation:
From the diagram, one liter of ethanol production from sugar cane requires 2000 liters of water. Hence, in order to produce 100 L of ethanol from sugar cane, 2000 x 100 = 200,000 L of water.
1000 liters of water is needed to produce 1 liter of ethanol from sugar beet. Hence, 200 x 1000 = 200,000 L of water will be needed to produce 200 liters of ethanol.
1000 liters of water is also required to produce 1 liter of ethanol from potatoes, hence, 300 x 1000 = 300,000 L of water would be required to produce 300 L of ethanol from the same material
About 500 liters of water is required to produce 1 liter of ethanol from corn, hence, 400 x 500 = 200,000 L of water would be needed to produce 400 L of ethanol from corn.
In conclusion, producing 300 L of ethanol from potatoes would require using the most water among all the options.
Which term is defined as the force applied to the object divided by the mass of the object?
speed
velocity
mass
acceleration
Answer:
acceleration
Explanation:
From the question: "FORCE... divided by the MASS..." is translated to a math equation as "F / m", where "F" is the force and "m" is the mass.
Now, the second Newton's law says "F = m . a ", where a is acceleration.
If you move m to the left side, clearly you have "F / m", and "a" is alone to the right. Math equation:
a = F / m
acceleration = force / mass
Determine What is the efficiency of a machine whose work output is 4 joules, and whose work input is 10 joules?
Answer:
The efficiency of the machine is 40 %.
Explanation:
We have,
Output work by the machine is 4 joules and the input work is 10 joules.
It is required to find the efficiency of a machine. The efficiency of a machine is given by the ratio of output work to the input work. It is given as :
[tex]\eta=\dfrac{4}{10}\times 100\\\\\eta=40\%[/tex]
So, the efficiency of the machine is 40 %.
does space have plenty of oxygen
Answer:
I don't think so because we can't breathe in space
Explanation:
Answer:
No
Explanation:
There is no oxygen in space, so astronauts must bring tanks of oxygen
what is mass times acceleration?
Answer:
Force
Explanation:
The mass of an object is the quantity of matter it contains. It is measured in kilograms.
Acceleration is the ratio of the change in the velocity of an object to the change in time. It is measured in m/[tex]s^{2}[/tex].
When the mass of an object is multiplied with its acceleration, this gives the average force applied on the object. As force is defined as agent that can change the state of an object.
i.e F = m × a
where F is the force, m is the mass of the object and a its acceleration.
The two major classes of force are; contact force and field force.
Which is true about density?
A. A possible unit for density is grams.
B. Liquid gold is denser than solid gold.
C. Density is found by multiplying mass
and volume.
D. Density is independent of the
amount of the sample.
Answer:
Density is independent of the
amount of the sample. (D)
Explanation:
Because density is an intrinsic property of matter.
hope it helps!
Answer:
D. Density is independent of the
amount of the sample.
Explanation:
Density is expressed in units of mass per volume, such as g/mL or kg/m3. Because the density of a substance does not depend on the amount of substance present, density is an “intensive property”. To measure the density of a sample of material, both the mass and volume of the sample must be determined.
Hope this Helps, Pls mark as the Brainliest
pls what is a friendly relationship
Answer:
A relationship where both members are freindly and supportive towards each other.
Explanation:
Brainliest?
Answer:
i do not know is your are talking about boyfriend and girlfriend relationship of you are talking about friendship i am just going to say both so for a friendship they do not have to like the same thing but if they do that is cool they have to be nice to each other and understand what one of them wants to do and they have to get along if they want to have a goof friendship so for boyfriend and girlfriend it is okay for them to fight and not understand each other they have to be friends so they can no what they like to do with each other then they can go on dates together
Explanation:
hope i help sorry very long
A pendulum reaches a height of 0.3 m at the top of its swing. If the
bob has a mass of 5 kg, what is the potential energy at the top of its
swing?
Select one:
14.7)
7.35 J
0.45 J
1.5 J
Answer: A
Potential energy = 14.7 J
Explanation:
Given that the
Mass M = 5 kg
Height h = 0.3 m
Let us take acceleration due to gravity g = 9.81 m/s^2
Potential energy = mgh
Substitute all the parameters into the formula above
P.E = 5 × 9.81 × 0.3
P.E = 14.715 J
P.E = 14.7 J approximately
The correct option is therefore A
What is used in the name of ionic compounds containing a cation with multiple charges to indicate which charge?
(No answers to display)
Answer:
Roman Numerals?
Explanation:
Iron(II), would be iron 2+
iron(III), would be iron 3+
for example.
In a circult, a battery is used to
1. slow down current
2. conduct current
3. raise the potential of electrons
4. convert electrical energy into some other form of energy
Answer:
4. convert electrical energy into some other form of energy
What is the kinetic energy of a bicylcle with a mass of 15 kg traveling at a velocity of 3 m/s?
KE = 0.5 x mv^2
Kinetic energy equals 1/2 times mass times velocity squared.
Mass = 15kg
Velocity = 3m/s
Plug it into the formula.
KE = 0.5 x 15(3^2)
KE = 0.5 x 15(9)
Multiply the mass and velocity squared.
KE = 0.5 x 135
Then, multiply the result by 1/2 or 0.5
KE = 67.5
The kinetic energy of a bicycle that has a mass of 15kg and travels at 3m/s is 67.5J.
Answer:
67.5 J
Explanation:
Kinetic energy can be found using the following formula.
[tex]KE=\frac{1}{2}mv^2[/tex]
where m is the mass in kilograms and v is the velocity in m/s.
We know the bike has a mass of 15 kilograms. We also know the velocity is 3 m/s. Therefore, we can substitute 15 for m and 3 for v
[tex]KE=\frac{1}{2}*15*3^2[/tex]
Evaluate the exponent first. 3^2 is the same as 3*3, which is equal to 9.
[tex]KE=\frac{1}{2} *15*9[/tex]
Multiply 15 and 9.
[tex]KE=\frac{1}{2} *135[/tex]
Multiply 1/2 and 135
[tex]KE=67.5[/tex]
Add appropriate units. Kinetic energy uses Joules or J as the units.
[tex]KE= 67.5 Joules[/tex]
The kinetic energy of the bike is 67.5 Joules
The diagram shows the field lines near the poles, X and Y, of two magnets.
At left a rectangular box with the long horizontal side labeled X. At right a rectangular box with the long horizontal side labeled Y. There is a gap between the boxes. Curved lines with arrowheads emerge from the right end of X and the left end of Y and point up and down.
Based on the field lines, what are the poles of the magnets?
X: north
Y: south
X: south
Y: north
X: north
Y: north
X: south
Y: south
Answer: I think it is C
Explanation: sorry if it wrong
Answer:
C
Explanation:
got it right on edge
3. Which of the following is an example of a
supplemental restraint system?
(a) air bag
(c) lap and shoulder belt
(b) safety belt
(d) antilock brakes
Answer:
A) air bag is your answer
Answer:
air bag
Explanation:
Any of several restraining systems in a vehicle, such as an airbag, in addition to the seatbelts.
What does ROCAPV mean?
Answer: Rancho de Area Comunes PV
Explanation: it means
Rancho de Area Comunes PV
In an AC Monte Roca PV System Profile, where the following are depicted:
Location
Commissioning
Production
Operator
PV system power
Module
And communication.
