C. Molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels.
What is wave?A wave can be defined as a propagating dynamic disturbance of one or more quantities.
A wave can be propagated in longitudinal or transverse method.
When waves start as a disturbance (an input of energy) in a medium (water, air, the earth etc).
The energy of the disturbance is moved from the starting point to other places in the medium by molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels.
Thus, the correct option is C.
"Molecules in the original disturbance disturb (move) adjacent molecules which disturb more adjacent molecules and so the wave travels".
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When a metal is illuminated by light, photoelectrons are observed provided the light's wavelength is less than 669 nm. What is the metal's work function (also called the binding energy)?
When a metal is illuminated by light, photoelectrons are observed provided the light's wavelength is less than 669 nm. The work function will be 0.030 * [tex]10^{-17}[/tex] J
The work function (or work function) is defined as the minimum amount of thermodynamic work (i.e. energy) required to remove an electron from a solid to a point in the vacuum immediately outside the solid surface.
When light of suitable frequency falls on a metal surface, electrons are emitted. These photo (light) generated electrons are called photoelectrons
h = 6.62 x [tex]10^{-34}[/tex] J/Hz
c = 3 * [tex]10^{8}[/tex] m/s
lambda = 669 * [tex]10^{-9}[/tex] m
work function = h*c/lambda
= 6.62 x [tex]10^{-34}[/tex] * 3 * [tex]10^{8}[/tex] / 669 * [tex]10^{-9}[/tex]
= 0.030 * [tex]10^{-17}[/tex] J
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A rubber ball is dropped on the floor. The rebound speed is one-half the speed it had just before hitting the floor. It will rise to ________ of the original height from which it was dropped. Group of answer choices 1/3 1/8 1/6 1/4 1/5
Since the rebound speed is one-half the speed it had just before hitting the floor, it will rise to 1/4 of the original height from which it was dropped; option C.
What is rebound speed?Rebound speed refers to the speed at which a body when it hits a surface is returned or rebounded to the original direction in which it comes from.
When objects are released from a height and allowed to hit the floor, some of the original energy of the object is converted to heat and sound, thus the object will rebound with a lesser speed and to a smaller height than from which it is released.
In the case of a rubber ball which is dropped on the floor. The rebound speed is one-half the speed it had just before hitting the floor.
Therefore, the height will be one-quarter the original height.
In conclusion, the rebounding of a ball is to a lesser height than the original height.
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The two articles you just read contain conflicting conclusions. What questions do you have about the information
presented in the articles? Maybe there's something you would like to know more about before making your own
conclusion. Or perhaps there's an item that was presented as a fact that you would like to investigate. Before you
make your conclusion about human involvement in climate change, list four to five questions that you would like
answered.
The five questions that I would like to be answered concerning human involvement in climate change would be disclosed below.
What is climate change?Climate change is defined as the change that affects the normal atmospheric patterns which is often related to the activities of the human and their environment.
The five questions that I would like to be answered concerning human involvement in climate change include the following:
Is climate change caused by humans? What are the main threats of climate change? How is climate change affecting animals? How is climate change affecting people? How is climate change affecting the ocean?From the definition, climate changes with respect to the activities of human beings. Such activities include the following:
Burning fossil fuels, cutting down forests,Fertilisers containing nitrogen,Fluorinated gases, andIncreased farming of livestock.Learn more about climate change here:
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A charge q = -10 µc experiences an electrostatic force of 35 mn to the left. What is the magnitude and direction of the electric field?
A charge q = -10 µc experiences an electrostatic force of 35 mn to the left.
The magnitude of electric field will be = 35 * [tex]10^{2}[/tex] N/C
Direction of the electric field will be from left to right
The force exerted by a charged body on another charged or uncharged body is called electrostatic force. This force is known as non-contact force because these forces comes into play even when the bodies are not in contact with each other.
Electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength or electric field intensity or simply the electric field.
given
q ( charge ) = -10 µc
Electrostatic force = 35 mN
Electric field = Force on charge / charge
= 35 * [tex]10^{-3}[/tex] / (-10 * [tex]10^{-6}[/tex])
= - 35 * [tex]10^{2}[/tex] N/C
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Physics question, please answer this ASAP, thanks!
(a) The gravitational force received by each 1 kg mass is 8.66 N.
(b) The magnitude of gravitational acceleration is 8.66 m/s².
(c) The orbital speed of the ISS is 7,663.6 m/s.
(d) The time take for the ISS to orbit round the Earth is 5,558.75 s = 1.54 hours.
Gravitational force received by each 1 kg mass
The gravitational force received by each 1 kg mass is calculated as follows;
F = Gm₁m₂/r²
where;
m₁ is mass of Earthm₂ is mass of ISSr is the distance between the ISS and center of EarthF = (6.67 x 10⁻¹¹ x 5.97 x 10²⁴ x 1) / (6780,000)²
F = 8.66 N
Magnitude of gravitational accelerationmg = GMm/r²
g = GM/r²
where;
M is mass of Earthg = (6.67 x 10⁻¹¹ x 5.97 x 10²⁴ ) / (6780,000)²
g = 8.66 m/s²
Orbital Speed of the ISSv = √GM/r
v = √(6.67 x 10⁻¹¹ x 5.97 x 10²⁴ / 6780,000)
v = 7,663.6 m/s
Time of motion of the ISS round the EarthT = 2πr/v
T = (2π x 6780,000) / (7663.6)
T = 5,558.75 seconds
1 hour = 3600 seconds
= 5,558.75/3600
= 1.54 hours
Thus, the gravitational force received by each 1 kg mass is 8.66 N.
The magnitude of gravitational acceleration is 8.66 m/s².
The orbital speed of the ISS is 7,663.6 m/s.
The time take for the ISS to orbit round the Earth is 5,558.75 s = 1.54 hours.
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Two vectors have magnitudes of 10 and 15. The angle between them when they are drawn with their tails at the same point is 65. The component of the longer vector along the line of the shorter is?
Two vectors have magnitudes of 10 and 15. The angle between them when they are drawn with their tails at the same point is 65. The component of the longer vector along the line of the shorter is 6.33 .
A vector is a quantity or phenomenon that has two independent properties: magnitude and direction. The term also denotes the mathematical or geometrical representation of such a quantity. Examples of vectors in nature are velocity, momentum, force, electromagnetic fields, and weight.
The taller component will be 15 . There will be two components taller component , one in the direction of shorter component and other perpendicular to the shorter wavelength .
The component of longer wavelength in the direction of shorter will be
= 15 cos (theta ) = 15 cos (65) = 6.33
where theta is the angle between both the vectors
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How many minutes will it take to plate out 16. 22 g of al metal from a solution of al 3 using a current of 12. 9 amps in an electrolytic cell?
It will take 103 minutes to plate out 16. 22 g of al metal from a solution of al 3 using a current of 12. 9 amps in an electrolytic cell
Electrolytic cell, any device in which electrical energy is converted to chemical energy, or vice versa. Such a cell typically consists of two metallic or electronic conductors (electrodes) held apart from each other and in contact with an electrolyte (q.v.), usually a dissolved or fused ionic compound
First, look at the reaction to decided how many moles of electrons it will take:
Al3+ + 3e ------> Al(s)
It takes 3 electrons to convert 1 mole of Al3+
Next, figure out how many moles of Al metal you want:
I mole of Al mass = 26 g
1 g of Al will have = 1/26 moles
16. 22 g of al metal will have = 16.22 / 26 moles 0.624 moles
since , their are 3 electrons
0.624 x 3= 1.87 moles of electrons
using Faraday constant to find the number of coulombs (C) needed:
1 faraday = 96500 C per mole
1.87 x 96500 = 180455
Since, 1 amp = 1 C/sec,, time needed to supply a current of 12.9 amp will be
80455C / 12.9 C = 6236.82 sec = 103 minutes
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As additional resistors are connected in parallel to a constant voltage source, how is the power supplied by the source affected?.
As additional resistors are included lined up across a consistent voltage source, there are more ways for current to take.
So more current spills out of the source, and the all out current provided by the source increments.
The power supplied by the battery is (voltage) x (current). So if the voltage is constant and the current increases, the power being supplied must also increase.
What is a resistor?A resistor is an electrical part that cutoff points or manages the progression of electrical flow in an electronic circuit. Resistors can likewise be utilized to give a particular voltage to a functioning gadget like a semiconductor.
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The resistance of platinum thermometer is 5.7 5.5, 5.2 at boiling point,
unknown temperature, θ, and at the freezing point of water respectively.
Determine the unknown temperature in θ°C.
The unknown temperature is 64°C
Given,
Resistance at ice point,R[tex]_{0}[/tex] =5.2Ω,
Resistance at steam point,R[tex]_{100}[/tex] = 5.7Ω,
Resistance when dip in unknow, R[tex]_{t}[/tex] = 5.5Ω,
R[tex]_{100}[/tex] = R[tex]_{0}[/tex] (1+α100)
α = R[tex]_{100}[/tex]-R[tex]_{0}[/tex] / R[tex]_{0}[/tex]×100
α = 0.00096 = 9×[tex]10^{-4}[/tex]°C[tex]^{-1}[/tex]
Let the temperature of hot bath = t°C
R[tex]_{t}[/tex] = R[tex]_{0}[/tex](1+αt)
t = R[tex]_{t}[/tex]- R[tex]_{0}[/tex] / R[tex]_{0}[/tex] α
t = 0.3 / 0.00468
t = 64°C
The unknown temperature is 64°C.
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The resistivity of the material of a wire is 1. 76 × 10-8 ωm. if the diameter of the wire is 2 × 10-3 m and its length is 2 m, what is its resistance?
The resistivity of the material of a wire is 1. 76 × 10-8 ωm. if the diameter of the wire is 2 × 10-3 m and its length is 2 m, then its resistance is 0.0112Ω
The resistance of a wire is solely determined by its length, cross-section area, and resistivity. So we calculate the resistance of a wire by knowing its diameter, length, and resistivity (which varies depending on the material). The resistance provided by a unit length of conductor with a unit area of cross-section is defined as resistivity. Its SI unit is the ohm-meter.
It does not alter as the wire length increases, but resistance increases fourfold when the wire is stretched to double its original length. Resistivity is defined as the electrical resistance per unit length and cross-sectional area of a conductor.
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Newton's reformulation of kepler's third law allows us to measure the masses of bodies in orbit around each other, if we can measure?
Newton's reformulation of kepler's third law allows us to measure the masses of bodies in orbit around each other, if we can measure the distances and periods of revolution
Isaac Newton made a reformulation of the 3rd law of Kepler with regards to the orbital periods of a planet and this helped to measure the masses of bodies in orbit around each other, if we can measure the distances and periods of revolution
What is kepler's third law?This refers to the law of physics that states that the square of the orbital periods of a planet is directly proportional to the cube of the semi-major axis of its orbit
Hence, there was a reformulation of the 3rd law of Kepler by Isaac Newton with regards to the orbital periods of a planet and this helped to measure the masses of bodies in orbit around each other, if we can measure the distances and periods of revolution
This shows that the distances and periods of revolution are key aspects to neasyre the masses of bodies in orbit around each other,
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According to current scientific understanding, the idea that the milky way galaxy might be home to a civilization millions of years more advanced than ours is.
According to contemporary scientific understanding, the thought that the Milky Way Galaxy energy is home to a civilization millions of years more developed than ours is. one reasonable solution to Fermi's paradox.
What is the milky way galaxy?Our Milky Way galaxy is simply one of the billions of galaxies in the universe. Within it, there are at smallest 100 billion stars, and on moderate, each star contains at least one planet circling it. This means there are potentially thousands of planetary procedures like our solar system within the galaxy!The Milky Way gets its name from a Greek myth about the goddess Hera who sprayed milk across the sky. In other parts of the world, our galaxy goes by different names.The Milky Way is about we look. Up, down, left, right, that is the Milky Way. From Earth, it can be noticed as a hazy form of stars in the evening sky that the stripped eye can barely notice. You can visit the Milky Way all year, no matter where you are on the earth.To learn more about Milky Way galaxy, refer to:
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write the factors of which affect pressure
Answer:
They are:
1. Height of liquid
2. Density of liquid
3. Acceleration due to gravity
Write an expression for elastic potential energy of a spring?
[tex]\huge\underline{\underline{\boxed{\mathbb {SOLUTION:}}}}[/tex]
[tex]\leadsto[/tex] The elastic potential energy of a spring can be said to be the energy possessed by a spring due to a force that compresses or stretches the spring. This can also be said to be the work which is done by the applied force against the restoring force of the spring, which is stored as the elastic potential energy.
The elastic potential of a spring can be expressed as:
▪ [tex]\longrightarrow \sf{PE= \: \dfrac{1}{2} kx}[/tex]
[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]
[tex] \bm{PE= \: \dfrac{1}{2} kx}[/tex]
Read the scenario below and answer the question that follows. susan was in her algebra class preparing to take a test. her instructor, mrs. williams, tells susan, "try hard, even though math can be difficult for women to succeed in." what is the most likely effect of mrs. williams’ comment on susan’s test performance, and why? a. improved performance due to study behavior b. improved performance due to mores c. reduced performance due to stereotype threat d. reduced performance due to cultural shaping please select the best answer from the choices provided a b c d
The correct option is (c) reduced performance due to stereotype threat.
What is a culture of learning?
A culture of learning, or learning culture, is one in which employees continuously seek, share, and apply new knowledge and skills to improve individual and organizational performance.
How does culture affect learning?
Through the rewards and penalties it administers for each distinct conduct, a culture establishes context for behavior. Cultures reinforce appropriate behavior and deter inappropriate behavior via influencing behavior.Why is culture important in learning?
Students learn more deeply about the subject matter when working and learning in a classroom with people from different origins and cultures. Additionally, it teaches students how to participate in a diverse workplace using their unique skills and perspectives.Learn more about culture of learning
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The strip of the sky through which the sun, the moon, and the bright planets appear to move in the course of a year is called:_______.
Answer:
Milky way galaxy
Explanation:
This is where the sun is the main star whereby the other planets and stars revolve around it in a cycle
The energy of a photon of red light is ____ the energy of a photon of blue light
A photon's energy and wavelength are inversely related. Since the wavelength of photons of blue light is less than photons of red light, it contains more energy than red photons.
Wavelengths of blue light are shorter, ranging from 450 to 495 nanometers. Red light has wavelengths that range from 620 to 750 nm and longer waves. Compared to red light, blue light has a greater frequency and more energy.
A photon's energy varies with its wavelength; those with longer wavelengths have less energy than those with shorter ones. For instance, red photons are less energetic than blue ones.
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The astronomy club placed the telescope on the tripod and that was their choice. according to the elements of style, which sentence is the best revision?
According to the Elements of Style, the telescope was set up on the tripod by the astronomy club.
To find the answer, we need to know about the revision.
How do revisions work?Simply put, a revision is a succinct summary of a situation or narrative.The astronomy club's decision to mount the telescope on the tripod qualifies as the best revision in this instance as defined by the Elements of Style. It effectively conveys the core concept.Thus, we can conclude that, according to the Elements of Style, the telescope was set up on the tripod by the astronomy club.
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The distance covered by a car moving with a speed of 36 km/h in 15m is (a) 0.9 km (b) 9.0 km (C) 90 km (d) 900 km
Speed of a car = 36 km/h
Time taken = 15 minutes
Converting the time into hour:-
= 15/60 hours
= 1/4 hours
As we know that,
Distance = Speed × Time= (36 × 1/4) kilometres
= 9 kilometres
Hence the distance covered is 9 kilometres.
Option b) 9.0 kmThis is a uniform rectilinear motion exercise.
To start solving this exercise, we obtain the following data:
Data:v = 36 km/hd = ¿?t = 15 min = 0.25 hrMinutes to hour converter
60 min = 1 hour
[tex]\boldsymbol{\sf15\not{min}*\dfrac{1 \ hr}{60 \not{min}}=0.25 \ hr }}[/tex]
To calculate distance, speed is multiplied by time.
We apply the following formula: d = v * t
We substitute our data into the formula:
[tex]\boldsymbol{\sf{d=v*t}}[/tex]
[tex]\boldsymbol{\sf{d=36 \dfrac{km}{\not{h}}*0.25 \not{h} }}[/tex]
[tex]\boldsymbol{\sf{d=9 \ km}}[/tex]
The distance traveled by a car moving with a speed of 36 km/h in 15 m is 9 km.
Therefore, the correct option is "B".After an action potential, the opening of additional voltage-gated \text{________} channels and the inactivation of sodium channels, cause the membrane to return to its resting membrane potential.
After an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.
What is an action potential?An action potential is defined as a difference in electrical charges across the cell membrane due to the unequal distribution of ions.
An action potential is produced by potassium and sodium channels that allow the movement of positive ions across the membrane.
In conclusion, after an action potential, the opening of voltage-gated potassium channels and Na channels causes the membrane to return to its resting membrane potential.
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I have provided a picture of the question
Answer:
7.8 x 10^18 electrons
Explanation:
1 Coulomb is 6.24 x10^18 charges multiply this by 1.25 to get the answer above
What is the molar concentration of a 300.0 ml solution containing 5.00 g of nh3?
The molar concentration of a 300.0 ml solution containing 5.00 g of NH3 will be 0.98 mol/L
Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution.
A mole is defined as the amount of a substance that contains exactly 6.02214076 X1023 elementary entities of the given substance. Thus, a mole of a substance is referred to as the mass of a substance containing the same number of fundamental units as atoms in exactly 12.000 g of 12C.
1 mol of NH3 has a mass of 17 g
Moles of NH3 = 5 g of NH3 * (1 mol of NH3 / 17 g of NH3)
= 0.294 mol of NH3
Litres of solution = 300 mL solution ×( 1 L solution/1000mL sol)
= 0.300 L of solution
Molarity = moles of solute / litres of solution
= 0.294 / 0.300 = 0.98 mol/L
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A positive charge of 94. 0 nc is 22. 0 cm from a negative charge of 53. 0 nc. the force on one of the charges due to the other is approximately________.
A positive charge of 94. 0 NC is 22. 0 cm from a negative charge of 53. 0 NC. The force on one of the charges due to the other is approximately 92.6× 10⁹ N
Force between the two charges depends upon the charges, distance between the charges and the medium between the two charges. It is given by:
F = kq₁q₂ / r²
where q₁ is the charge of the first charge
q₂ is the charge of the second charge
r is the distance between the charges
k is the permitivitty of medium
F is the force between the two charges
Given , q₁ = 94NC
q₂ = 53NC
r = 22cm = 0.22m
On subsituting,
F = 9 × 10⁹ × 94 × 53 / (0.22)²
⇒ F = 92.6 × 10⁹ N
Since, the force between the two charges is equal on both the charges hence, force on one of the charges due to the other is approximately 92.6× 10⁹ N.
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21. A person standing 49.5m from the foot of a cliff claps his hands and hears an echo 0.3
seconds later. Calculate the velocity of the sound in air
Answer:
330 m/s
Explanation:
The sound wave has to travel TO the cliff AND back = 2 * 49.5 = 99 m
magnitude of velocity = distance / time = 99m / .3 s = 330 m/s
The overall dimming of starlight passing through dust clouds is called?
The overall dimming of starlight passing through dust clouds is Extinction .
To find the answer, we need to know more about the Extinction.
What is Extinction ?Extinction is the electromagnetic radiation that is absorbed and scattered by gas and dust between an emitting astronomical object and the observer. Robert Julius Trumpler first identified interstellar extinction around 1930. However, Friedrich Georg Wilhelm von Struve had identified its effects in 1847, and a number of people had seen its impact on star colors but had not made the connection between it and the general abundance of galactic dust. Extinction in the visual band of frequencies (photometric system) for stars in the Milky Way plane and within a few thousand parsecs of the Earth is approximately 1.8 magnitudes per kiloparsec.Thus, we can conclude that, the overall dimming of starlight passing through dust clouds is Extinction .
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Assuming a mass of 0.04-g, what is the power exerted by the electrical forces on a fragment of fiber if the fragment has a velocity of 200 mm/s, 10 ms after ejection?
8.0× 10⁻⁵ Watts is the power exerted
What is Power, Energy and Work done?Physics' three essential notions are work, energy, and power. When a force (push or pull) given to an item results in the displacement of the object, that force is said to have performed work. Energy is how we describe the ability to perform the task. Power is the amount of work completed in a given amount of time.
mass of the body = 0.04 g = 4.0 × 10^-5 kg
velocity of the body = 200mm/s = 0.2 m/s
Kinetic energy of the body = 1/2 × 4.0 × 10^-5 × 0.2^2
Kinetic energy of the body = 8.0× 10^-7
Thus, work done = 8.0× 10^-7 J
Power = work done/ time
Power exerted = 8.0× 10^-7/0.01
Power exerted = 8.0× 10^-5 Watts
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What must the charge (sign and magnitude) of a particle of mass 1. 45 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 660 n/c?
The charge (sign and magnitude) of a particle of mass 1.45 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 660 N/C is -2.19C
A particle with some charge moving in an electric field experience force due to electric field.
For the charged particle to remain stationary the force due to electric field and the weight of the particle should be equal.
Force due to electric field = QE
where, Q is the charge of the particle
E is the electric field = 660N/C
Weight of the particle = mg
where, m is the mass of particle = 1.45g = 0.00145kg
g is the acceleration due to gravity = 10m/s²
Hence, force due to electric field = weight of the particle
QE = mg
⇒ Q × 660 = 0.00145 × 10
⇒ Q = 2.19 C
Since the electric field is downward, hence to balance the charged particle, the force applied should be in the upwards direction. So, this is possible if the charge Q is negative.
So, the charged particle has a charge of -2.19C
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Fuel crises will occur in future because of a. over use of petroleum
b. use of solar energy
c. over use of bio-gas
d. use of hydro-energy
If the current coming out a battery in a series circuit is 2 A, the current going into
the battery on the other side must be
Answer:
2 A
Explanation:
Kirchhoff Laws to the circuit consisting more than two batteries, the current leaving the battery is as same as entering the battery
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What is the maximum number of grams of fat recommended on a 2000-kcalorie diet based on the daily value?
a. 34
b. 45
c. 78
d. 56
e. 67
The maximum number of grams of fat recommended on a 2000-kcalorie diet based on the daily value is around 65 grams,therefore option (e)
The term "daily value" (DV) describes how much of a nutrient you should eat daily based on a diet of 2,000 calories.On the FDA website, you may obtain the daily values for a variety of nutrients. In order to meet the average adult's energy requirements, the FDA picked 2,000 calories.Fat intake must be kept to a minimum. A 2,000 calorie diet per day should contain no more than 65 grammes of total fat, 20 grammes or less of saturated fat, and trace levels of trans fat. Trans fats are bad because they narrow our arteries, increasing our risk of coronary heart disease.Learn more about daily value from here:https://brainly.com/question/23095932
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