Answers
The electron transport chain uses electrons between protein complexes to set up a proton gradient.
As the name suggests, the electron transport chain involves a series of proteins that pass electrons from one to the next. These electrons are removed from glucose, releasing energy as they pass through the electron transport chain. This energy is used to pump protons across the semipermeable membrane, creating a proton gradient that can drive ATP synthesis.
The electron transport chain is a series of four protein complexes that combine redox reactions to generate an electrochemical gradient that leads to the formation of ATP in a complete system called oxidative phosphorylation.
When an electron moves from a low redox potential to a high redox potential, the free energy released when high-energy electron donors and acceptors are converted to low-energy products is used by complex electron transport chains to create an electrochemical ion gradient. It is this electrochemical gradient that drives ATP synthesis by coupling to oxidative phosphorylation by use of ATP synthase.
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Related Questions
A copper cable is 1.2 km long and has a cross-sectional area of 5 mm^2. Find its resistance at 80°C if at 20°C the resistivity of copper is 0.02*10^-6ohm m and its temperature coefficient of resistance is 0.004/°C
Answers
The resistance of the copper wire at 80°C is r = 5.952 ohms
Given copper cable length is 1.2 km
The area of cross section given is 5 mm^2
Thus the equation for resistivity is:
p (t) = p (0) × ( 1 + a × ( change in temperature )
p(t) = 0.02 × 10^-6 × ( 1 + 0.004 × 60 )
p (t) = 2.48 × \(10^-^8\) ohm m
r = ( p × l ) ÷ a
r = ( 2.48 × \(10^-^8\) × 1200 ) ÷ 5 × \(10^-^6\)
r = 5.952 ohms
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Question 1
Which of the following governs the motion of our solar system?
Magnetism
Gravity
Sunlight
Friction
Answers
Answer:
Gravity
Explanation:
Pretty self-explanatory
We are kept on earth because of gravity and it keeps planets orbiting around the sun.
True or False: Solids always have a higher density than liquids and gases.
Answers
Answer:
TRUE THE ANSWER IS TRUE
:)
If you add a light bulb to the circuit, the filament in the bulb will resist the flow of
electrons and convert energy into____and_____
a.)light and heat
b.)electrons and neutrons
c.)energy and matter
d.)electrons and protons
Answers
Answer:
Light and heat!
Explanation:
This is correct<3
Answer:
light and heat
Explanation:
i love science
. A 60 kg Chala is at the top of a slope, as shown in the figure. At the initial point A, he is 10 m vertically above point B. a) Setting the zero level for gravitational potential energy at B, find the gravitational potential energy of this system when Chala is at A and then at B. Finally, find the change in potential energy of the Chala-Earth system as Chala goes from point A to point B.
Answers
For point A: h = 10 m (Chala is 10 m vertically above point B)
PE_A = 60 kg × 9.81 m/s² × 10 m = 5886 J (joules)
For point B: Since we set the zero level for gravitational potential energy at point B, the potential energy of Chala at point B is:
PE_B = 0 J (joules)
Now, let's find the change in gravitational potential energy as Chala goes from point A to point B:
∆PE = PE_B - PE_A = 0 J - 5886 J = -5886 JThe change in potential energy of the Chala-Earth system as Chala goes from point A to point B is -5886 J. The negative sign indicates that the gravitational potential energy has decreased.
When a ball is thrown straight up with no air Resistance, the acceleration is in what direction ?
Answers
Answer:
The ball has a velocity upwards but the acceleration is downwards. Gravity is giving the ball a downwards acceleration from the moment the ball leaves the hands.
Consider as a system the gas in a vertical cylinder; the cylinder is fitted with a piston on which a number of small weights are placed. The initial pressure is 200 kPa, and the initial volume of the gas is 0.04 m3 . (a) Let a Bunsen burner be placed under the cylinder, and let the volume of the gas increase to 0.1 m3 while the pressure remains constant. Calculate the work done by the system during this process. (b) Consider the same system and initial conditions, but at the same time that the Bunsen burner is under the cylinder and the piston is rising, remove weights from the piston at a rate such that, during the process, the temperature of the gas remains co
Answers
Answer:
Explanation:
a ) At constant pressure , work done = P x Δ V
= 200 x 10³ x ( .1 - .04 )
= 12 x 10³ J .
b )
At constant temperature work done
= n RT ln v₂ / v₁
= PV ln v₂ / v₁
= 200 x 10³ x .04 ln .1 / .04
8 x 10³ x .916
= 7.33 x 10³ J .
In your opinion, to whom must you learn the explanation of the biological changes and sexual urges first, especially the sexual responses? Why?
Thank you for your answer.KeepSafe♥️
Answers
Assuming that the slug's body is 3% salt, what is the most likely prediction that would result from placing the slug into a 6% salt solution?
Answers
Answer: As i know, please see the Explanation
Explanation:The cell contains 3% salt, so we can safely assume that it contains 100%−3%=97% water.
A car is travelling in a straight line and has its velocity uniformly reduced from 20 m * s ^ - 1 to 12m * s ^ - 1 in a distance of 80 m. The car the travels at the lower velocity for 1 minute, and then decelerates uniformly to rest in a further 12 sec. show the whole journey on a velocity-time graph and calculate
(i) the initial deceleration and the time taken to travel 80 m.
(ii) the final deceleration
(iii) the total displacement for the whole journey
Answers
i) The initial deceleration of the car is -1.6 m/s² and the time taken is 5 seconds
ii) The final deceleration is -1 m/s²
iii) The total dispalcement = 1016 m
What is the initial deceleration of the car?The initial deceleration of the car is given by the formula below:
v² = u² + 2as
where;
v is the initial velocityu is the final velocitya is acceleration/decelerations is the displacementSolving for a;
12² = 20² + 2 * a * 80
a = -1.6 m/s²
Time taken, t = v - u / a
t = 12 - 20 / (-1.6)
t = 5 seconds
Final deceleration:
a = v - u / t
a = 0 - 12 / 12
a = -1 m/s²
iii) Displacement at constant velocity = 12 * 1 * 60
Displacement at constant velocity = 720 m
Final displacement, s = ut + 0.5at²
s = 12 * 12 + 0.5 * 1 * 12²
s = 216 m
Total dispalcement = 80 + 720 + 216
Total dispalcement = 1016 m
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Urgent!!! big brain needed!
A 66.4 kg person sits on the right end of a seesaw, 2.35 m from the fulcrum. On the other end, how far from the fulcrum should a 84.2 kg person sit to balance the seesaw?
1.92 m
1.85 m
2.08 m
1.61 m
Answers
1.85 m if On the right side of a seesaw, 2.35 meters from the fulcrum, a 66.4 kg individual is seated. How far away from the fulcrum on the opposite end should an 84.2 kg.
The correct statement is B.
What is a fulcrum with an example?For those who are unsure of what a fulcrum is, The answer to the question a fulcrum is the fixed point of a lever. A seesaw, for instance, is a lever with a fulcrum with in middle. The fulcrum of a seesaw is the stationary central component.
What are a pivot and a fulcrum?• The lever's pivot or turning point, or fulcrum. • The load, or the items you are attempting to transport. • The force, or the energy expended in moving the weight. With the help of a lever, you can move a heavy object with little effort. A lever is easier to move the farther away the effort (or force) comes from the fulcrum.
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Matter is anything that has mass and takes up space. Which units of measurement can you use to describe these two properties?
Answers
Mass can be measured in kilograms (kg) or grams (g). Volume can be measured in cubic meters (m3) or liters (L).
What units of measurement are used to describe mass and volume?Mass is typically measured in metric units such as kilograms (kg) or grams (g). Volume is usually measured in liters (L) or milliliters (mL). In the United States, mass is also often measured in pounds (lb) and ounces (oz) while volume is measured in gallons (gal) or quarts (qt).The metric system is the most commonly used system of measurement worldwide, and it is based on the International System of Units (SI). It is a decimal system, with each unit divided into 10 parts.The kilogram is the base unit of mass in the metric system and it is used to measure the mass of larger objects. One kilogram is equivalent to 1000 grams. The gram is used to measure the mass of smaller objects such as food products, coins, and jewelry.The liter is the base unit of volume in the metric system and it is used to measure the volume of liquids. One liter is equivalent to 1000 milliliters. The milliliter is used to measure the volume of smaller quantities such as medication doses and small amounts of liquid.To learn more about measurement refer to:
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A 1,100 kg car is traveling at 20 m/s as it begins going down a 40 m hill. What is its total mechanical energy?(1 point)
A 651,200 J
B 211,200 J
C 431,200 J
D 220,000 J
Answers
Answer: 651,200 J
Explanation:
The total mechanical energy of the car is determined as 651,200 J.
Option A is the correct answer.
What is the total mechanical energy of the car?
The total mechanical energy of the car is the sum of the kinetic energy and potential energy of the car.
Mathematically, the total mechanical energy of the car is given as;
M = K.E + P.E
where;
K.E is the kinetic energy of the carP.E is the potential energy of the carM = ¹/₂mv² + mgh
where;
m is the mass of the carv is the velocity of the carh is the height of the hillg is acceleration due to gravityThe given parameters include;
m is the mass of the car = 1,100 kgv is the velocity of the car = 20 m/sh is the height of the hill = 40 mg is acceleration due to gravity = 9.8 m/s²M = ¹/₂(1100)(20²) + (1100)(9.8)40)
M = 651,200 J
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A Carnot engine performs 2.5 * 104 J of work in each cycle and has an efficiency of 66%. (a) How much heat does the engine extract from its heat source in each cycle? (b) If the engine exhausts heat at room temperature 120.0°C2, what is the temperature of its heat source? A Carnot engine performs 2.5 * 104 J of work in each cycle and has an efficiency of 66%. (a) How much heat does the engine extract from its heat source in each cycle? (b) If the engine exhausts heat at room temperature (20.0°C), what is the temperature of its heat source?
Answers
a.
The heat the engine extracts from its heat source in each cycle is 3.79 × 10⁴ J
The efficiency of the Carnot engine, ε = W/Q where W = work done per cycle = 2.5 × 10⁴ J and Q = heat extracted in each cycle.
Making Q subject of the formula, we have
Q = W/ε
Since ε = 66% = 0.66, we substitute the values of the variables into the equation for Q.
So, Q = W/ε
Q = 2.5 × 10⁴ J/0.66
Q = 3.79 × 10⁴ J
So, the heat the engine extracts from its heat source in each cycle is 3.79 × 10⁴ J
b.
The temperature of its heat source is 588.76 °C
Also, the efficiency of the Carnot engine, ε = 1 - T/T' where T = temperature of exhaust heat = 20° C = 273 + 20 = 293 K and T' = temperature of heat source.
Making T' subject of the formula, we have
T' = T/(1 - ε)
Since ε = 66 % = 0.66
Substituting the values of the variables into the equation, we have
T' = T/(1 - ε)
T' = 293 K/(1 - 0.66)
T = 293 K/0.34
T = 861.76 K
We convert this to Celsius.
T(K) = T(°C) + 273
T(°C) = T(K) - 273
T(°C) = 861.76 - 273
T(°C) = 588.76 °C
So, the temperature of its heat source is 588.76 °C
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looking at error instrumental error the actual value of the mass of the object, called a calibration mass, is 250.0 g. below, calculate the difference of each measurement from the actual value. use negative symbols if the measured mass is less than the actual mass. is there any pattern to the difference? yes no difference from actual value balance 2 253.135 g 253.131 g 253.133 g 253.130 g 253.132 g 253.130 g 253.131 g 253.136 g 253.133 g 253.134 g
Answers
To calculate the difference between each measurement and the actual value of 250.0 g, we subtract 250.0 g from each measured value. The results are:
How to calculate actual value ?Balance 2:
253.135 g - 250.0 g = +3.135 g
253.131 g - 250.0 g = +3.131 g
253.133 g - 250.0 g = +3.133 g
253.130 g - 250.0 g = +3.130 g
253.132 g - 250.0 g = +3.132 g
253.130 g - 250.0 g = +3.130 g
253.131 g - 250.0 g = +3.131 g
253.136 g - 250.0 g = +3.136 g
253.133 g - 250.0 g = +3.133 g
253.134 g - 250.0 g = +3.134 g
As we can see, all the differences are positive, which means that all the measured values are greater than the actual value. There does not seem to be a clear pattern to the differences, but they are all relatively small, with a maximum difference of 3.136 g. This suggests that the balance is fairly accurate, but it may be possible to improve the precision by taking more measurements and averaging the results.To know more about actual value , check out :
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A ball is thrown in the air at an angle of 60.0° to the ground, with an initial speed of 30m/s. How far from its original position does it land?
Answers
Answer:
The distance is \(R = 79.5 \ m\)
Explanation:
From the question we are told that
The angle at which the ball is thrown is \(\theta = 60^o\)
The initial speed is \(u = 30 \ m/s\)
Generally the distance from the original position which the ball covered is mathematically evaluated as
\(R = \frac{ u^2 * sin 2\theta }{g}\)
=> \(R = \frac{ 30^2 * sin (2* 60)}{9.8}\)
=> \(R = 79.5 \ m\)
Mathias is going to do some informational interviewing. What is one of the main benefits of doing these interviews?
O A.
OB.
O C.
O D.
A.He will gain insight about a new career opportunity.
B.He will likely be offered a position with a company.
C.He will be able to ask questions about job openings.
D.He will find out how much money everyone earns.
Answers
Answer:
A
Explanation:
One of the main benefits of informational interviewing is that it allows the person conducting the interviews to gain insights and information about a particular career or industry.
What happens to the force of gravity between two masses if the mass of one of the objects decreases?
The force of gravity also increases
The force of gravity stays the same
The force of gravity decreases
none of these apply
Answers
It increases
Explanation:
The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them. This means that the force of gravity increases with mass, but decreases with increasing distance between object
Answer:
C: Gravity decreases
Explanation:
Find the emitted power per square meter of peak intensity for a 3000 K object that emits thermal radiation. Express your answer to three significant figures and include the appropriate units. H MÅ 0 = ? P= Value Units Submit Request Answer oblem 5.58 SUDITI NcqucstATIS WEL
Answers
The peak wavelength for peak intensity of 3000 K is 967 nm and peak wavelength for peak intensity of 50,000K will be 58nm.
What is Power?
Power is the amount of energy which is transferred or converted per unit of time taken. In the International System of Units, the unit of power is the watt (W), which is equal to one joule per second.
Stefan-Boltzmann constant = 5.67 × 10⁻⁸ Wm²
Peak intensity = 2000 K
P = (5.67 × 10⁻⁸) × (3000)⁴
P = 4.59 × 10⁶
P = 459 2700 watts of power per square meter.
Peak intensity = 3000 K
Using Wein law,
λ max = 0.29/ 7
λ max = 0.29/ 3000 = 9.67 × 10⁻⁵ = 967 nm
Same method as above will be used for 50,000 K
P = 3.56 × 10¹¹ W/m²
P = 356.00.000000000 W/m²
λ (Peak) = 58nm
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A device called an insolation meter is used to measure the intensity of sunlight. It has an area of 100 cm2 and registers 6.50 W. What is the intensity in W/m2
Answers
Answer:
650W/m²Explanation:
Intensity of the sunlight is expressed as I = Power/cross sectional area. It is measured in W/m²
Given parameters
Power rating = 6.50Watts
Cross sectional area = 100cm²
Before we calculate the intensity, we need to convert the area to m² first.
100cm² = 10cm * 10cm
SInce 100cm = 1m
10cm = (10/100)m
10cm = 0.1m
100cm² = 0.1m * 0.1m = 0.01m²
Area (in m²) = 0.01m²
Required
Intensity of the sunlight I
I = P/A
I = 6.5/0.01
I = 650W/m²
Hence, the intensity of the sunlight in W/m² is 650W/m²
(a) Express the following in their respective units
12nm to pm
Answers
Answer:
To convert nanometers (nm) to picometers (pm), you need to multiply the value by 1,000. Therefore, to convert 12 nanometers to picometers, you would perform the following calculation:
12 nm * 1,000 pm/nm = 12,000 pm
So, 12 nanometers is equal to 12,000 picometers.
a cat is being chased by a dog both are running in a straight line at constant speed. The cat has a headstart
Answers
what is meant by reticlinear propatigation of light?
Answers
Answer:
The property of light going in a straight lines in a homogenous straightforward medium is known as rectilinear engendering of light.
Answer:
the property of light travelling in a straight lines in a homogenous transparent medium
Explanation:
Ken Runfast is the star of the cross-country team. During a recent morning run, Ken averaged a speed of 5 m/s for 12.4 minutes. Ken then averaged a speed of 6.1 m/s for 6 minutes. Determine the total distance (in m) that Ken ran during his jog.
Answers
The star of a cross-country team is Ken Runfast. Ken recently ran for 12.4 minutes at an average speed of 5 m/s. After then, Ken's average speed was 6.1.
What is the total distance travelled?Distance is the overall movement of an item with consideration of direction. Regardless of an object's starting or ending position, distance can be defined as the amount of ground it has covered.
Why do we measure distance?We can determine an object's actual size by learning how far away it is. The area an object occupies in the sky can be measured. The distance from it must then be determined in order to determine its true size. An thing appears smaller the further it is away.
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1. What were enron failure issue ? What were corporate Governance isues in Enron.
Answers
The Enron scandal drew attention to accounting and corporate fraud as its shareholders lost $74 billion in the four years leading up to its bankruptcy, and its employees lost billions in pension benefits.
What were Enron failure issue ?Enron's Board of Directors failed to fulfil its fiduciary duties towards the corporation's shareholders. Secondly, the top executives of Enron were greedy and acted in their own self-interest.
Enron's downfall was attributed to its reckless use of derivatives and special purpose entities. By hedging its risks with special purpose entities which it owned, Enron retained the risks associated with the transactions. This arrangement had Enron implementing hedges with itself.
Enron raised fundamental issues about corporate fraud, accounting transparency, and investor protection.
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A simple pendulum, consists of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not stretch. In the absence of air friction, the system oscillates by swinging back and forth in a vertical plane. If the string is 2.45
m
long and makes an initial angle of 26.0
∘
with the vertical, calculate the speed of the particle at the following positions.
(a) at the lowest point in its trajectory.
(b) when the angle is 15.0
∘
.
Answers
The angular speed of the pendulum is √7 rad/s.
We need to know about pendulum experiments to solve this problem. The pendulum is a simple experiment to calculate gravitational acceleration. The gravitational acceleration can be calculated by
g = 4π² . L / T²
where g is gravitational acceleration, L is the length of the string and T is the period.
From the question above, we know that:
L = 1.40 m
g = 9.8 m/s²
θmax = 31°
m = m
Find the period of pendulum
g = 4π² . L / T²
9.8 = 4π² . 1.4 / T²
T² = 4π²/7
T = 2π√7 / 7 s
Find the angular speed
ώ = 2π / T
ώ = 2π / (2π√7 / 7)
ώ = √7 rad/s.
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Question 3 of 10
What is the primary means by which heat is transferred through fluids?
O A. Direct contact of particles
OB. Radiation
OC. Electromagnetic waves
OD. Convection currents
Answers
The primary means by which heat is transferred through fluids is convection currents (option D).
What is convection current?Convection is the transmission of heat in a fluid by the circulation of currents.
Heat can be transferred by different methods depending on the medium. Fluids like gases and liquids transfer heat through the process of convection.
Therefore, the primary means by which heat is transferred through fluids is convection currents.
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Patterns of stars in constellations hardly change in appearance over times of even a few thousand
years. Why?
Answers
how many legs a cow has
Answers
A friend pushes a sled across horizontal snow and when it gets up to speed the friend jumps on. After the friend jumps on, the sled gradually slows down. Which forces act on the combined sled plus friend after the friend jumps on
Answers
Answer:
v’ =( \(\frac{1}{1+ \frac{M}{m} }\) ) v
we see that the greater the difference, the more the sled slows down.
friction force
Explanation:
When the man pushes the sled he does work and the sled acquires a speed and as long as it is supplied with an energy equal to the work of the chipping force with the snow, the speed is maintained.
When he jumps on the sled, a collision occurs and the initial moment
p₀ = mv
is increased by the increase in mass
m_f= (m + M_{man} ) v '
In this case there is no longer any external force applied and the only external force is friction, which causes the sled to stop, even when it is small, but the significant reduction in speed is due to the increase in masses.
p₀ = p_f
mv = (m + M_{man}) v '
v ’= \(\frac{m}{m+M}\) v
v’ =( \(\frac{1}{1+ \frac{M}{m} }\) ) v
Therefore, we see that the greater the difference, the more the sled slows down.
The only forces that act on the sled with the man are the friction that is responsible for the decrease in speed and weight with the normal