The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.
What is battery?A battery is a device that uses an electrochemical oxidation-reduction (redox) cycle to turn the chemical energy included in its active components directly into electric energy. An electric circuit is used in this kind of reaction to transmit electrons from one substance to another.
The actual elector-chemical unit used to produce or store electric
For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.
The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.
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please help me out !!
Space exploration costs the taxpayers of united states millions of dollars each year. However, it is the only way we will learn more information about space. Do you think the cost of space exploration is justified or should those tax dollars be spent elsewhere? Explain your answer.
The space exploration program should continue, and should receive continued generous annual funding.
The US space program has NEVER launched a capsule full of money into space. NEVER ! The money spent on the space program is paid to hundreds of thousands of employees and contractors who design, develop, build, and launch the spacecraft and the scientific equipment they carry.
These people who get the money spend it to buy homes, cars, clothes, beer and bread, and send their children to school ... exactly the same things other Americans do with the money they earn on their jobs.
Just because the most visible product of this industry gets shot into space and never comes back does NOT mean that the money to do it is also lost forever. It's taxpayer money that the government pours straight back into the nation's economy, through the hands of the workers and scientists who operate the US space program.
About how long does light take to cross the milky way galaxy?.
Answer:
100,000 to 200,000 years to cross the milky way.
Explanation:
give any 2 evidence of the unsual expansion of water
Answer:
The anomalous expansion of water is an abnormal property of water whereby it expands instead of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense.
Explanation:
The density is maximum at 4 degree centigrade and decreases below that temperature as shown in graph.
What are some downsides to fossil fuels? (Select all that apply.)
They release large amounts of carbon dioxide when burned.
They are in a limited supply.
They are expensive to extract compared to other forms of energy.
They do not replenish themselves.
Answer:
They release large amounts of carbon dioxide when burned.
They are expensive to extract compared to other forms of energy.
They do not replenish themselves
Explanation:
You need to move a large refrigerator. It has a mass of 300 kg. You want to accelerate it at a rate of 3 m/s/s. What force must you apply?
Answer:
900 N
Explanation:
F = ma
= 300 (3) = 900 N
Systems in the body interact to carry out life functions. The muscles of the body are part of the musculoskeletal system. Which system provides the impulses that cause the muscles to contract?
A.
circulatory
B.
integumentary
C.
respiratory
D.
nervous
The electromagnetic spectrum is the complete range of electromagnetic radiation ranging from radio waves to gamma rays. Which type of radiation in this spectrum is associated with observable colors such as red, green, and blue?.
A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 388 K. If 80 J of work is done by the gas during this process, what is the mass of the helium sample? The universal gas constant is 8.31451 J/mol · K. Answer in units of g
The mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.
Number of moles of the helium gasThe number of moles of the helium gas is calculated as follows;
W = nRT
where;
n is the number of molesW is the work doneR is universal gas constant = 8.31451 J/mol · KT is the final temperature = 388 K273 K = 0⁰C and 388 K = 115⁰ C
from 0⁰C to 115⁰C = 115 - 0 = 115⁰ C
115⁰ C = 388 K
The number of moles is calculated as follows;
n = W/RT
[tex]n = \frac{80}{8.315 \times 388} \\\\n = 0.0248 \ mol[/tex].
Mass of the helium sampleMass of the helium sample is calculated as follows;
m = Mn
where;
M is the molar mass of helium gas = 4 g/molm = 4 g/mol x 0.0248 mol
m = 0.099 g
Thus, the mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.
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How to prepare for physics ATP exam o'levels?
Spend time on this subject. Physics may have some concepts which are difficult for students to understand in some cases. A key example is electricity and magnetism. Spend extra time on topics you find difficult and most of all, remember to do PAST PAPERS. These will be your light in the dark, your teachers, your friends. Continue to do them, and remember to leave one unsolved before your examinations. This will orient your mind for the examination and let you achieve the maximum marks possible.
how can magnets cause objects to have kinetic energy?
please help asap
What is the name for a supporting force that acts upward and in a direction perpendicular to a surface
where are metamorphic rocks formed? And how are they formed
6th Grade Earth science
Answer:
Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found deep within the Earth or where tectonic plates meet.
Which of the following describes the conditions for an inelastic collision?
(A) momentum conserved, kinetic energy conserved
(B) momentum conserved, kinetic energy not conserved
(C) momentum not conserved, kinetic energy conserved
(D) momentum not conserved, kinetic energy not conserved
Answer: I think it is C.
Explanation: In an inelastic collision, the object hits the item and stays with it. Therefore, both momentum and kinetic energy need to be presen.t
What is the frequency of a wave that has a period of 5 seconds
Answer:
0.20 Hz
Explanation:
Frequency is the reciprocal of the period. The period is 5 seconds, so the frequency is 1/(5 s) = 0.20 Hz.
Which is an example of measurement that considers velocity? A the size of a standard basketball B the speed of baseball pitch C the placement of players on a field D the study of how records get broken
Answer: B, the speed of baseball pitch
Explanation:
The speed of a baseball pitch is an example of a measurement that considers velocity, therefore the correct answer is option B.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second.
average speed = total distance /Total time
The speed of the baseball pitch is an example of the measurement of velocity.
The size of a standard basketball is an example of the measurement of length.
similarly, option C and option d are unrelated to the measurement of the velocity.
The correct response is option B since a baseball pitch's speed is an example of a measurement that takes velocity into account.
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HELP ME PLEASEEEE ILL GIVE BRAINLY
Answer:
Labeling from top left to bottom right
A) transmission - direct light being transmitted as direct light
B) reflection - light being reflected back
C) refraction - incident light being refracted
D) diffraction - diffracting slit shown
E) absorption - light absorbed and reemitted
F) scattering - light scattered in different direction
Under what circumstances can differentiation occur in a planet?.
1. What is the approximate age of the fossil described in the activity?
1.8 million years
18 million years
.9 million years
90 million years
Answer:
B.
Explanation:
It should be B. 18 million years ago.
I apologize if it is incorrect-
I hope it helps! Have a great day!
Anygays-
Answer:
B. 18 million years
Explanation:
The answer is B. 18 million years
I hope it helps! Have a great day!
Muffin ^^
During which month will the pointer stars of the Big Dipper point directly upward, away from the horizon?
Pls helppp
Answer:
April
Explanation:
Questions #7 and 8:
Part 1 of 2: An ideal gas, initially at a volume of 6.22222 L and pressure of 9 kPa, undergoes isothermal expansion until its volume is 8 L and its pressure is 7 kPa. Calculate the work done by the gas during this process. Answer in units of J.
Part 2 of 2: Find the heat added to the gas during this process. Answer in units of J.
(a) The work done by the ideal gas during the isothermal exapnsion process is -3.556 J.
(b) The heat added to the gas during this process is 3.556 J.
Work done by the ideal gas
The work done by an ideal gas in isothermal expansion is change in pressure and volume of the gas. The change in the internal energy of the gas is zero.
The work done by the given ideal gas is calculated as follows;
W = ΔPV
where;
ΔP is change in pressure of the gasΔV is change in volume of the gasW = (P₂ - P₁)(V₂ - V₁)
W = (7kPa - 9kPa)(8L - 6.222L)
W = -3.556 kPa.L
1 kPa.L = 1 J
W = -3.556 J
Heat added to the processΔU = q + w
where;
ΔU is change in internal energy = 00 = q + (-3.556)
q = 3.556 J
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A strong permanent magnet is difficult to move along the aluminum plate, but the magnet does not stick to the plate. Why is it like that ?
Because of its crystal scructure, usually under normal circumstances aluminum is not magnetic. This is why the magnet does not stick to the plate. The aluminium material is referred to as a paragmetic material, it shares this classification with other metals such as Lithium and Magnesium.
a 65 kg climber on top of Mount Everest (8800 m high). what is the gravitational potential energy?
Answer:
He has 5,609,404 J of potential energy
Explanation:
P.E. = M*G*H
65 * 9.8^2 * 8800
The potential energy of the climber whos weight is 65 kg at a height of 8800 m is 5.6 × 10⁶ Joules.
What is Potential energy?The potential energy of a body is defined as that generated by virtue of its position which is the form of energy stored in an object when it is at rest. When a body stops its motion, its kinetic energy is converted into potential energy.
Potential energy is related to the mass 'm' and height 'h' of the object from the ground and the acceleration due to gravity g is expressed as:
PE = m g h.
For above given information, mass of the climber = 65 Kg
Height of the mountain = 8800 m
g = 9.8 m/s²
Thus, PE = 65 kg × 8800 m × 9.8 m/s² = 5.6 × 10⁶ Joules.
Thus, the potential energy of the climber will be 5.6 × 10⁶ Joules.
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what force much be applied to stop a 1400kg car that is initially traveling at 13 m/s over a 5 second time period
Answer:
As per Provided Information
Mass of car m is 1400KgInitial velocity u is 13m/sTime taken to stop t is 5 second .Final velocity v is 0m/swe have been asked to determine the force applied to stop the car. First we will calculate the acceleration of the car.
[tex] \boxed{\bf \: a \: = \dfrac{(v - u)}{t}}[/tex]
Substituting the value and let's solve it
[tex] \longrightarrow\sf \: a \: = \dfrac{0 - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = \cfrac{ - 13}{5} \\ \\ \\ \longrightarrow\sf \: a \: = - 2.6 \: {ms}^{ - 2} [/tex]
Now, let's calculate the force applied to stop the car .
[tex] \pink{\boxed{\bf \: F = ma}}[/tex]
Substituting the value we get
[tex] \longrightarrow \sf \: F = 1400 \times ( - 2.6) \\ \\ \\ \longrightarrow \sf \: F = - 3640 \: N[/tex]
Here , negative sign show that the " Force is acting in opposite direction of the motion"
Therefore,
3640 Newton force is required to stop the car .How would the removal of the rabbit population affect the other populations in
the ecosystem?
A.
B.
The field mouse population will decrease.
The snake population will increase.
The lizard population will increase.
The tree population will decrease.
C.
D.
WILL GIVE BRAINLIEST!!!
What is the equivalent resistance of a circut that contains two 50.0 resistors connects in parellels with a 12.0 V battery?
o A. 25.0
o B. 0.040
o C. 100.0
o D. 0.48
Answer:
1/Re=1/R1 +1/R2= 2x1/R1=2/R1=2/R2=2/50=1/25
1/Re=1/25, so the answer is Re= 25
the answer is A. 25.0
Answer:
A. 25.0
Explanation:
1/Re = 1/R1 + 1/R2 = 2 x 1/R1 = 2/R1 = 2/R2 = 2/50 = 1/251/Re = 1/25
The answer is Re= 25
I hope this helps! Have a great day!
Anygays-
what does goin to get da milk mean
Answer:
going to get the milk
Explanation:
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A particle moves in the xy plane in a circle centered on the origin. at a certain instant the velocity and acceleration of the particle are 6. 0 m/s and (3. 0 + 4. 0) m/s2. what are the x and y coordinates of the particle at this moment?
The x and y coordinates of the particle at this moment is (6x + 4.5y) m.
Position of the particleThe position of the particle at any instant is determined from the velocity and acceleration of the particle as shown below.
v² = u² + 2as
where;
v is the final velocity of the particleu is the initial velocitya is the acceleration of the particles is the position of the particlev² = 0 + 2as
v² = 2as
s = v²/2a
X and y - coordinates of the particle[tex]s_x = \frac{v^2}{2a_x} = \frac{6^2}{2(3)} = 6\ m\\\\s_y = \frac{v^2}{2a_y} = \frac{6^2}{2(4)} = 4.5 \ m\\\\s = (6 x \ + 4.5y)m[/tex]
Thus, the x and y coordinates of the particle at this moment is (6x + 4.5y) m.
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Why do the wavelengths of the absorption and emission lines match?.
Without using a micrometer screw gauge, how do I find the average diameter of a long piece of thin wire using a metre rule and a uniform glass rod?
Answer:
Wind the long piece of thin wire around the uniform glass rod multiple times, find the length of the total diameters using the metre ruler, and divide by the number of times you wound it around the rod.
Explanation:
Since the diameter of one long piece of thin wire is too thin to be measured by a metre ruler, you can wind it multiple times and push it side by side to get a length you can measure.
For example, if you wound it around 20 times and the total length of 20 diameters of the wire side-by-side is 2.0 cm, one winding, which is the diameter would be 2.0cm ÷ 20 = 0.10cm or 1mm.
An ideal single movable pulley requires an input force that is one-half the ouput force.
True False
