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a 100 g ball moves in a vertical circle on a 1.07 m-long string. if the speed at the top is 3.90 m/s, then the speed at the bottom will be 7.56 m/s. a) What is the gravitational force acting on the ball? b)What is the tension in the string when the ball is at the top?
(a) The gravitational force is 980 N
(b) The tension in the string is 441.49 N
Given : Mass of the ball = 100 gram
Length of the string = 1.07 m
the acceleration = 9.8 [tex]m/s^2[/tex]
(a) The gravitational force ;
W = mg
this implies W = (100)( 9.8)
W = 980 N
thus the gravitational force is 980 N
(b) The tension can be calculated by adding the gravitational force and equating it to the mv^2/r
W + T = [tex]\frac{mv^2}{r}[/tex]
W + T = [tex]\frac{100 X 3.9^2}{1.07}[/tex]
980 + T = 1421.49
T = 1421.49 - 980
this implies T = 441.49 N
thus tension = 441.49 N
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(13%) problem 4: modern wind turbines generate electricity from wind power. the large, massive blades have a large moment of inertia and carry a great amount of angular momentum when rotating. a wind turbine has a total of 3 blades. each blade has a mass of m
Moment of inertia of 3 blades of a wind turbine with given values is
111 .375 x 10⁵ kg.m².
Each blade is in the form of rod with axis near one end of the rod so,
Moment of inertia of one blade
= 1/3 x m l²
where, m is mass of the blade and l is length of each blade.
∴Total moment of moment of 3 blades= 3 x (1/3) x m l²
=ml²
Given,
m = 5500 kg
l = 45 m
Putting these values in above equation we get moment of inertia of one blade
= 1/3 x 5500 x 45 x 45
= 37.125 x 10⁵ kg.m²
∴Moment of inertia of 3 blades
= 3 x 37.125 x 10⁵ kg.m²
= 111 .375 x 10⁵ kg.m²
i.e. Required moment of inertia of 3 blades of a wind turbine with given values is 111 .375 x 10⁵ kg.m².
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What are the 3 follow up steps you should take after a collision?.
Stop, assist anyone who is hurt, protect your cars from additional damage, dial 911, and exchange any necessary details with the authorities.
What exactly does it mean to collide?A forceful collision; the act of colliding; collision between two aircraft, or crash. a collision of goals; a dispute. When two particles or bodies collide, they each apply a force that causes them to lose or gain energy or momentum. This is known as a collision in physics.
In physics, what exactly is a collision?When particles, groups of particles, or solid objects travel in the same direction and get close enough to one another to contact and have an impact on one another, that is when a collision occurs in physics.
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type nm cable can be run in all the following locations, except . i. concealed in dry locations ii. concealed in damp and moist locations iii. exterior masonry block or tile walls
Type NM cable can be run in all the following locations, except concealed in damp and moist locations.
Type NM cable shall be permitted as follows:
For both exposed and concealed work in normally dry locationsTo be installed or fished in air voids in masonry block or tile wallsType NM cables shall not be used under the following conditions or in the following locations:
Where exposed to corrosive fumes or vaporsWhere embedded in masonry, concrete, adobe, fill, or plasterIn a shallow chase in masonry, concrete, or adobe and covered with plaster, adobe, or similar finishIn wet or damp locationsTherefore, Type NM cable can be run in all the following locations, except concealed in damp and moist locations.
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how large are asteroids? how does the total mass of all asteroids compare to the mass of a terrestrial world?
Vesta, the largest asteroid, has a diameter of about 329 miles (530 kilometers), but there are also bodies that are only 33 feet (10 meters) across.
All of the asteroids put together have less mass than the moon of Earth or terrestrial world.
What are asteroids ?Small, stony objects called asteroids orbit the Sun. Despite orbiting the Sun similarly to planets, asteroids are far smaller than planets.
Asteroids can be divided into three general composition classes: C-, S-, and M-types.
The majority of asteroids are C-type (chondrite) objects. They are dark in color and most likely made of silicate and clay rocks.
Nickel-iron alloys and silicate minerals make up the S-types ("stony").
Metal makes up the M-types (nickel-iron).
The Sun has never been hit by an asteroids, but that doesn't imply they don't! Asteroids typically stay in the belt between Mars and Jupiter known as the asteroid belt, but on rare occasions, something can cause them to deviate from their original orbits and crash into the inner solar system.
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A 50 gram mass is hanging from a spring whose unstreached length is 10 cm and whose spring constant is 2.5 N/m. In the list below are described five situations. In some of the situations, the mass is at rest and remains at rest. In other situations, at the instant described, the mass is in the middle of an oscillation initiated by a person pulling the mass downward 5 cm from its equilibrium position and releasing it. Ignore both air resistance and internal damping in the spring. Assume the spring is a perfect Hooke's law spring for all the oscillations in this problem. As the time the oscillation occur, indicate whether the force vector requested points up (U), down (D), or has magnitude zero (0). 1. The force on the mass exerted by the spring when the mass is at its equilibrium position and is at rest. 2. The force on the mass exerted by the spring when the mass is at its equilibrium position and is moving downward. 3. The net force on the mass when the mass is at its equilibrium position and is moving upward. 4. The force on the mass exerted by the spring when it is at the top of its oscillation. 5. The net force on the mass when it is at the tap alpha its oscillation. Reconsider the last two questions if the person pulled the mass down by 25 cm and released it. 1. The force on the mass exerted by the spring when it is at the top of its oscillation. 2. The net force on the mass when it is at the top of its oscillation.
A 50 gram mass is hanging from a spring whose unstreached length is 10 cm and whose spring constant is 2.5 N/m. Base on the data above, it can describe of the following events:
1. In equilibrium state, the force given on the mass is equal to weigh force of the mass, or we can write it as [tex]F_{spring} = W_{mass}[/tex]. The reason why its the same, because the state of the system is equilibrium. That means, the spring must give the same amount of force to neutralize mass weigh force factor in opposite direction.
2. The force given by the spring to the mass when moving downward is bigger than when in equilibrium state. In equilibrium state, the force from spring only to neutralize weigh force factor from the mass. But, when the mass is moving downward because of some the force needed by spring to counter the mass force is bigger
3. The force given by the spring to the mass when moving upward is lower than when in equilibrium state. In equilibrium state, the force from spring only to neutralize weigh force factor from the mass. But, when the mass is moving upward the force is being decrease because the force that held the spring to streach to equilibrium state is getting lower.
4. The force given by the spring to the mass when moving downward is maximum. Maximum here is the force that is given by spring to mass is the highest force in its oscilation. When the mass is being strech 25cm down, the mass will oscilation up and down until it reach the equilibrium again. But it will not reach 25cm again in its oscillation because it damper force by the spring
5. The net force is the difference between force given by spring and weigh force of mass. At the top of its oscilation can be calculate by the difference of mass weight force and potensial force of spring with 25cm strecht
What would happen if the price of an inelastic good went up?.
The total revenue, on the other hand, rises as a result of the higher price and constant quantity demanded for an inelastic good when the price is raised and the demand remains the same.
Inelastic demand is when consumer preferences do not change as much as changes in the price of a good. When the price increases by 20% while the decrease in demand is only 1%, the demand is said to be inelastic. Elastic items are usually required when appropriate substitutes are not available. The items with the most prevalent inelastic demand are utilities, prescription drugs, and tobacco products. Businesses that sell these items may be more tolerant of price changes because demand for them never ceases, regardless of price changes. The amount of a good that is purchased has no effect on price changes when the price elasticity of demand for that good is completely inelastic; rather, higher prices will always lead to higher overall income. whenever the cost of a thing or service changes, the demand for such items remains mostly stable.
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a solenoid of length 1.00 cm1.00 cm and radius 0.550 cm0.550 cm has 4545 turns. if the wire of the solenoid has 1.95 amps1.95 amps of current, what is the magnitude of the magnetic field inside the solenoid?
The magnitude of the magnetic field inside the solenoid is 4.56 X 10-3 T
A magnetic subject is a vector subject that describes the magnetic effect on shifting electric fees, electric currents, and magnetic materials. A shifting rate in a magnetic subject experiences a force perpendicular to its own speed and to the magnetic area.
A magnetic area is a vector area that describes the magnetic have an impact on transferring electric powered prices, electric powered currents, and magnetic substances. A moving rate in a magnetic area studies a force perpendicular to its very own pace and to the magnetic subject.
Calculation
B = UNI/L
B = (4pi X 10-7)(25)(1.45)/(.01)
B = 4.56 X 10-3 T
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a coil is connected in series with a 13.7 k resistor. an ideal 73.0 v battery is applied across the two devices, and the current reaches a value of 2.95 ma after 5.46 ms (a) Find the inductance of the coil. (b) How much energy is stored in the coil at this same moment?
The inductance of the inductor is 169Ω and the energy in the inductor is 1.48 x 10⁻³ J.
The resistance of the resistor is 13.7K and the ideal battery has EMF 73.0 V. So, the initial current in the circuit will be,
I = 73/13700
I = 5.3 mA.
The current reaches 2.95 mA after 5.46 mA.
(a). The inductance in the coil can be given by,
E = LΔI/Δt
L is the inductance and E is the EMF, So, Putting values,
73 = L(2.35)/5.46
L = 169Ω.
(b) The energy in the inductor when current is 2.95 mA,
E = 1/2LI²
Putting values,
E = 1/2 x 169 x 2.95 x 2.95 x 10⁻⁶
E = 1.48 x 10⁻³ J.
So, energy in the inductor is 1.48 x 10⁻³ J.
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which of the following best describes why the moon goes through phases? which of the following best describes why the moon goes through phases? earth's shadow falls on different parts of the moon at different times. the moon is somewhat flattened and disk-like, and appears more or less round depending on the precise angle from which we see it we see only part of the lit-up face of the moon depending on its position relative to earth and sun (elongation angle) the sunlight reflected from earth lights up the moon but is less effective when the moon is lower in the sky than when it is higher in the sky
Earth's shadow falls on different parts of the moon at different times best describes why the moon goes through phases.
First off, there are four distinct moon phases, each of which has a different shape and is influenced by the moon's position in relation to the Earth. Earth revolves around the Sun, while the moon revolves around the Earth. However, there are four primary moon phases; we also refer to them as the lunar phases.
First Quarter, Full Moon, Last Quarter, and last but not least, The New Moon, are the four phases. The eight phases that make up the moon's phase are divided into four intermediate phases. The moon phases are essentially the numerous ways the moon appears over the course of a month. The side of the moon that faces the sun will be illuminated as it circles around the planet Earth.
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class dataanalytics { public static void main(string args[]) { // declare an object to receive the data scanner scan
Scanner scan = new Scanner(System. in); // prompt user to enter the data
System. out. println("Please enter the data: "); // read the data
String data = scan. nextLine(); // close the scanner
scan. close(); // print the data
System. out. println("The data entered is: " + data); } }
How does the code work?This code snippet is a basic example of data analytics. It initializes a Scanner object to receive user input, prompting the user to enter data and then reads it as a String.
The code then closes the Scanner and prints out the data that was entered by the user. This is a simple demonstration of how data can be read and analyzed using Java.
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What is called in the interior of the Earth can be classified as primordial and radiogenic heat?.
Primordial heat and radiogenic heat are the two main sources of the Earth's interior heat. The disintegration of radioactive materials deep below the Earth's interior produces radiogenic heat.
The Earth's mantle and core contain these elements, including uranium, thorium, and potassium. These elements produce heat when they decompose, which is energy. The heat produced by the Earth since its origin 4.5 billion years ago is known as primordial heat. The energy generated during the Earth's birth as a result of the condensation of gas and dust from the solar nebula is what causes this heat. The heat generated by this process is still present in the Earth's interior and is what causes the Earth's surface to move.
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a current of 3 a is passed through a lamp for 2 seconds using a 6 v power supply. the energy dissipated by this lamp during the two seconds is:
A lamp receives a 3 a current for 2 seconds from a 6 v power source. This lamp lost 3.6J of energy during those two seconds.
J=0.3 A
t = 2MIN = 2*60 =120sec
V=6v
E=VIT
=6*0.3*120
=216J
for 2 sec is
E=VIT
=6*0.3*2
=3.6J
Energy is characterized as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward: energy is just the force that moves objects. Potential and kinetic energy are the two different categories. An electrical charge carrier flow known as current often involves electrons or atoms lacking in electrons. Amperes are the common unit and are denoted by the letter A. Typically, the letter I is used to represent current. While current and electron flow in the same direction, they do so in opposite directions. Electrons move from a negative potential to a positive potential, and vice versa.
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It is possible to travel faster than the speed of sound
a pure 440 hz sine wave is applied to the input of a nonlinear power amplifier in order for our perfect pitch ee senior student, jacob, to hear and help his professor tune an antique piano perfectly. however, a frequency spectrum analysis also reveals that the output waveform of nonlinear power amplifer consists of 880 Hz, 1.72 kHz, 3.08 kHz, and 5.72 kHz sinusoidal components, with respective voltage levels of -7 dB, -23 dB, -12 dB and -48 dB relative to the 440 Hz sinusoidal output components which has an output level of 2.1 volts. a. determine the % THD of this nonlinear power amplifer and explain why this is happening b. which harmonic are being heard and show a rough spectrum diagram of the signal
(a) 51.72 is the % THD of this nonlinear power amplifier.
(b) 2nd, 4th, 7th and 13th harmonic are being heard and show a rough spectrum diagram of the signal.
How to find %THD ?(a). V = 2.1v
let V₂, V₄, V₇ and V₁₃ be components that is 880Hz, 1.76KHz, 3.08KHz and 5.72KHz.
Then, 20 ㏒ V₂/V₁ = -7 ⇒V₂ = 0.938 V
20 ㏒ V₄/V₁ = -23 ⇒V₄ = 0.1486 V
20 ㏒ V₇/V₁ = -12 ⇒V₇ = 0.527 V
20 ㏒ V₁₃/V₁ = -48 ⇒ V₁₃ = 8.36 V
So, % THD = (V₂² + V₄² + V₇² + V₁₃²) / V₁ × 100
⇒ √(0.938² + 0.1486² + 0.527² + 0.00836²) / 2.1 × 100
⇒ 51.72%
(b). Fundamental = 440 Hz
880Hz = 2 × 440 Hz
1.76KHz = 2 × 440 Hz
3.08KHz = 2 × 440 Hz
5.72KHz = 2 × 440 Hz
So, 2nd, 4th, 7th and 13th harmonic are there.
What is Harmonic?A harmonic is a wave or signal whose frequency is a multiple of the frequency of the same reference signal or wave by an integral (whole number). The frequency of such a signal or wave relative to the frequency of the reference signal or wave is another aspect of the harmonic series that the phrase might refer to.
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which of the following is not a type of electromagnetic wave with lower energy than visible light waves? group of answer choices the waves that carry am or fm broadcasts radar waves microwaves x-rays
The waves that carry am or fm broadcasts. The signal that is going to be broadcast modulates the amplitude of a radio wave known as the "carrier" or "carrier wave."
What are FM and AM radio waves ?Amplitude modulation is a type of modulation used in electronic communication, most frequently for radio wave transmission of messages. Amplitude modulation involves varying the wave's amplitude according to the message signal, in this case an audio signal.By changing the wave's instantaneous frequency, information is encoded in a carrier wave using frequency modulation. The technique is utilised in computers, signal processing, radio transmission, and telecommunications.The carrier wave is modulated, or altered, in a different way. With AM radio, the signal's amplitude, or overall strength, is changed to include the sound data. The carrier signal's frequency can be changed when using FM.A carrier wave of a certain frequency is modulated using the sound of the programme material, which typically originates from a radio studio, before being broadcast.To learn more about radio waves refer :
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what is the speed of a point on the earth's surface halfway between the equator and the pole? (hint: what is the radius of the circle in which the point moves?)
The speed of the point is 463.4 miles per hour.
What is speed?
The speed of an object, also known as v in kinematics, is the size of the change in that object's position over time or even the size of the change in that object's position per unit of time, making it a scalar quantity. The instantaneous speed is indeed the upper limit of a average speed as the length of time interval approaches zero. The average speed of the object in a period of time is equal to the distance travelled by object divided by duration of the period. Velocity and speed are not the same thing.
The speed of a point on the Earth's surface halfway between the equator and the pole is equal to the circumference of the circle divided by the time it takes for the Earth to rotate once, which is 24 hours.
The circumference of a circle is equal to 2πr, where r is the radius of the circle. Since the point is halfway between the equator and the pole,
The radius is equal to half of the Earth's radius, which is approximately 3,963 miles.
Therefore, the speed of the point is equal to 2π(3,963 miles) / 24 hours = 463.4 miles per hour.
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TRUE/FALSE. the engine of an aircraft propeller delivers an amount of power 171 hphp to the propeller at a rotational velocity of 2410 rev/minrev/min.
The engine of an aircraft propeller delivers an amount of power 171 hp to the propeller at a rotational velocity of 2410 rev/min. This is a false statement.
What is power?
Power can be defined as the amount of work completed in a given amount of time. Watt (W), which is derived from joules per second (J/s), is the SI unit of power. Horsepower (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motor vehicles and other devices.
With out knowing mass of the propeller, it can't be concluded about its rotational velocity - no mater how much power is applied on it.
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given the proposed longitudinal profile of the centerline of a rural two-lane highway (one lane each direction) as follows: pvil2 stn 11 00 pvil2 elev. 100 ft g2. Calculate the required minimum design lengths (to meet the SSD requirements) of the three back-to-back vertical curves on this section of the roadway to accommodate a continuous design speed of 50 mph. (15 pt)
For producing this kind of energy wave a high current source must feed the primary of the pancake coil and load capacitor.
The inside lead of the pancake coil should be grounded in the earth and not be common with high current power source.
A magnetically quenched spark gap can be used for creating the short duration pulses needed that have zero back flow of energy.
The spark gap and magnets are setting for preventing this back flow by careful adjustment. This is the key for creating the longitudinal waves.
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astronomers have concluded that the sun's activity varies in an 11-year cycle. which of the following statements about this cycle is true:
Over the period of 11 years, the amount of sunspots increases and decreases.
Who and what are astronomers?Astronomers do research on planets, stars, and some other heavenly bodies. They employ both space-based technology, such as the Space Telescope Hubble and ground-based technology, such as optical telescopes. Some astronomers investigate far-off galaxies and objects like neutron stars and black holes.
Is a job in astronomy rewarding?Astronomy experts have the capacity to carry out study and put their beliefs to the test. Others find it enjoyable to communicate their findings of the study to the public after they've concluded their work. Furthermore, astronomy jobs pay well enough to support a family.
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the permissible shear stress for the weldment illustrated is 140 mpa. estimate the bending load stress that will cause this stress in the weldment throat
The bending load shear stress was found to be 12.5kip
what is shear stress ?
Shear stress, often denoted by (Greek: tau), is the component of stress that is coplanar with a material cross section. It is caused by shear force, a component of the force vector parallel to the material cross section. Normal stress, on the other hand, is caused by the force vector component that is perpendicular to the material cross section on which it acts. Shear stress is a force that tends to distort a material by causing slippage along a plane or planes parallel to the imposed stress. The resulting shear is extremely important in nature, since it is directly tied to the downslope flow of earth elements and earthquakes.
Primary shear: τ′=0
Secondary shear:
Ju=2πr3 =2π(1.5)3 =21.21 in3
J=0.707hJu=0.707(1/4)(21.21)=3.749 in4
2 welds:
τ′′=Mr/2J=8F(1.5)/2(3.749)=1.600F
τ′′=τallow ⇒1.600F=20⇒F=12.5 kip
Therefore the bending load shear stress was found to be 12.5kip
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Using Figures A and B find the magnitude and direction of the buoyant force that is acting on the object submerged in the water. (Assume F1=25.0 N and F2=26.2 N. Enter your magnitude to at least three significant figures.) II||| F2 Figure A Figure B 1.2 N, downward 51.2 N upward 1.2 N, upward O 51.2 N downward
Using Figures A and B The magnitude and direction of buoyant force is 1.2N upward
Weight of object in water(F1 )= 25 N , Weight of object in air(F2) = 26.2 N
Direction and magnitude of buoyant force(FB)
We know that the spring balance measures the net normal force(N) acting on object.
In figure (B), the forces acting on object are,
Gravitational force acting in downward direction.
Tension acting in upward direction.
Hence the net force equation for object is,
Normal force = Gravitational force
Fg = F2 = 26.2 N ---(1)-
Therefore the weight(or gravitational force on object) of object is 26.2 N
Now in figure (A), the forces acting on object are,
Gravitational Force(Fg) acting in downward direction.
Normal force(F1) acting in upward direction.
Buoyant force (direction unknown)
Hence the net force equation for object is
Normal Force = Gravitational Force + Buoyant force
F1 = Fg + FB
FB = F1 - Fg = 25 - 26.2 = -1.2 N ----(2)--( negative sign indicates that the direction of buoyant force is opposite to the direction we considered earlier)
FB = 1.2 N (in upward direction)
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the time it takes for a college student to travel between her home and her college is uniformly distributed between 40 and 90 minutes. refer to exhibit 6-2. the probability that her trip will take exactly 50 minutes is
For the continuous probability distribution probability at any constant value is 0. Because the interval width is 0 in that case. There must always be an interval to calculate the probability in case of a uniform distribution.
Continuous probability distribution: A probability distribution in which the random variable X can take on any (continuous) value. Since there are an infinite number of values that can be assumed by X, the probability that X will take a given value is zero.
For the probability distribution of continuous distributions in this problem each constant value is 0.
P[x= 50] = 0
P(the journey will take exactly 50 minutes) = 0
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What is the optional vacuum cup mount bracket for the control head of a yaesu ftm-400dr?.
The Yaesu MMB-98 is an optional vacuum cup mount for the control head of the Yaesu FTM-400DR.
Cameras, scopes, testing tools, antennas, lights, signs, and much more can be mounted to them. Industrial strong suction cup for mounting your equipment to vehicles, bikes, boats, and other surfaces. The pump-active provides greater stability and suction power than the sure lock lever method. Yaesu Transceiver Mounting Brackets let you attach your radio and/or faceplate for better sight and operation. Secure attachment is provided by sturdy metal brackets. Some Yaesu accessory mounting brackets are sold separately or in kits that include a separation cable.
Yaesu Mobile Transceiver Mounting Brackets can assist you in remotely mounting your control head and primary mobile transceiver components. Vacuum cup mounting bracket with angle adjustment, newly created MMB-98. Yaesu's MMB-9 front panel attachment bracket was created specifically for Yaesu
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Which part of cellular respiration produces the most ATP how does it work?.
The correct answer is Electron Chain Transport.
The process human cells use to generate ATP is called cellular respiration.
In cellular respiration there is a phase of electron transport chain and it produces majority of ATP.
The two ATP-producing processes can be viewed as glycolysis (the anaerobic part) followed by aerobic respiration (the oxygen-requiring part).
Aerobic reaction can be defined as biological and chemical processes that occurs in the presence of oxygen.
Hence, an aerobic reaction requires oxygen before it can take place or occur and it produces adenosine triphosphate (ATP) as one of its end product.
In aerobic respiration, there are two main processes:
Krebs cycleElectron chain transportIt is the electron chain transport, that produces maximum ATPs. This is a stage in cellular respiration.
In mitochondria, between the matrix and inner mitochondrial space, an electron gradient is produced by the function of ETS. This ETS gets electron from NADH and FADH₂. This proton motive force is utilized for ADP and ATP and this production is called oxidative phosphorylation. This is called phosphorylation and along with phosphorylation it also has oxidation. The proton gradient helps in the generation of large amount of ATP molecules through chemiosmosis.
ATP are produced by ATPase enzyme.
Therefore, the process through which majority if ATP is produced by cellular respiration through the process of Electron chain transport.
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the interpretation of the wavefunction that describes them as probability amplitudes was developed by:
The interpretation of the wavefunction that describes them as probability amplitudes was developed by Max Born.
Max Born was one of the renowned physicists known for his splendid work in the field of quantum mechanics.
When the scientists of his time were using the three-dimensional standing wave to describe about the wavelength, he was the person who used probably amplitude to describe a wavefunction.
To describe a wavelength using the probably amplitude, Max Born used and developed the Schrodinger's view of the electron.
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outside temperature over a day can be modeled as a sinusoidal function. suppose you know the temperature is 75 degrees at midnight and the high and low temperature during the day are 90 and 60 degrees, respectively. assuming t is the number of hours since midnight, find an equation for the temperature, d, in terms of t.
Assume you are aware that the night-time temperature is 75 degrees and that the daytime maximum and low temperatures are 85 and 65, respectively.
A sinusoidal function can be used to mimic the daily variation in outside temperature. A sinusoidal function can be used to mimic the daily variation in outside temperature.
A sinusoidal function can be used to mimic the daily variation in outside temperature. Suppose you are aware of the high and low temperatures and that it is 75 degrees at midnight.
The temperature will fluctuate between a high of 82 during the day and a low of 69 at night. That is what this value is. If it continues to show that indicator of social function at the 24-hour mark, we are back at 75.
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Radiation in the infrared (IR) range is________
in energy than visible or ultraviolet light. When a molecule absorbs IR radiation,_________ within the molecule and each____________ creates a band in the molecule's IR spectrum
Compared to visible or ultraviolet light, infrared (IR) radiation has [lower] energy.A molecule's internal bonds vibrate when it absorbs IR radiation, and each [ wavelength] produces a band in the molecule's IR spectrum.
Between visible light and X-rays on the electromagnetic spectrum is ultraviolet light.The wavelength range of UV "light" is between 10 and 400 nanometers. The wavelength of VL is about Four hundred nanometers. Hospitals use UV rays because of their potency to sterilize medical equipment. All living cells are destroyed by the high UV radiation doses. Elephants cover themselves in mud to shield themselves from the sun. Under UV light, scorpions glow. UV radiation is a type of non-ionizing radiation that is emitted by artificial sources like tanning beds and the sun. While it can produce vitamin D, which is good for people, there are also potential health risks. The sun is a natural source of UV radiation for us.
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at what distance from a 21 mwmw point source of electromagnetic waves is the electric field amplitude 0.040 v/mv/m ?
At a distance d from the source, the EM wave's intensity is represented 28.1m.
Determine the distance?When an electromagnetic wave source with power P generates waves isotropically in all directions, its intensity (I) is calculated at a distance d from the source as follows:
I = \sP \s4 \sπ \sd \s2.
Given to us are
The EM wave's source power is 21 mW.
At a distance d (to be determined) from the source, the electric field's amplitude is E o.
= \s0.040
V \s/ \sm
The EM wave's intensity (I)
I = \s1 \s2 \s× \sϵ \so \s× \sE \s2 \so \s× \sc \sI
= \s1 \s2 \s× \s8.85 \s× \s10 \s− \s12 \s× \s( \s0.040 \s)
2 \s× \s3 \s× \s10 \s8 \sI
= \s2.12 \s× \s10 \s− \s6
W \s/ \sm \s2
determining the distance d
At a distance d from the source, the EM wave's intensity is represented by the following formula:
I = \sP \s4 \sπ \sd \s2 \s2.12 \s× \s10 \s− \s6
W \s/ \sm \s2
= \s21 \s× \s10 \s− \s3
W \s4 \sπ \sd \s2 \sd
= \s28.1m .
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a 1 kg object is dropped from a height of 100 meters. air resistance is negligible. at what height will it reach half the potential energy?
The 1kg object dropped from 100m would reach half its potential energy halfway through the drop.
What is potential energy?
Simply explained, potential energy is the energy that an object holds due to its position in relation to a zero point. An object has gravitational potential energy if it is positioned at a height above (or below) the zero height.
Potential energy is energy that is conserved or stored in a substance or object. The amount of stored energy depends on the arrangement, organization, and state of the object or substance.
It can be thought of as energy that has the "potential" to do work. When the object's position, configuration, or state changes, the energy will also change.
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