Students and scientists construct scale models of natural phenomena to better observe patterns and relationships.
What is natural phenomena?
Things that happen naturally—phenomena—occur or show up without human intervention. Gravity, tides, moons, planets, volcanic lightning, starling swarms, ant armies, sandstorms, biological processes and oscillation, among countless more events, are examples of natural phenomena.
Scientists and students use models to help them visualize their current understanding of a system in the condition that it is in right now.
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What happens to the pressure of an ideal gas inside a container if the temperature increases from 25 oc to 100 oc but the volume and amount of gas remains constant? (0 oc = 273 k).
By ideal gas approximation, the pressure will rise until 1.25 times greater than the initial pressure.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
T1 = 25 ⁰C = 298 K
T2 = 100 ⁰C = 373 K
Assume that P1 = P
When the initial and final temperature is the same, we can use the ratio of pressure and temperature as
P1 / T1 = P2 / T2
P / 298 = P2 / 373
P2 = 1.25 P
Hence, the pressure will rise until 1.25 times greater than the initial pressure.
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1. The charged particles from the Sun interact with Earth's intense magnetic field at the North and South Poles, making the sky glow in colors in the effect known as:
A.the Coriolis force.
B.the magnetosphere.
C.solar wind.
D.an aurora.
A triangle has two sides of length 10 cm and 14 cm. what can you say about the length of the third side?
A side of any triangle is less than the sum of the other two sides so the third side must be less than 24cm.
What is a triangle?A triangle is a 3-sided shape that is occasionally referred to as a triangle. There are three sides and three angles in every triangle, some of which may be the same.
The sum of all three angles inside a triangle will be 180° and the area of a triangle is given as (1/2) × base × height.
There are many types of triangles such that right-angle triangles, equilateral triangles, and much more.
In any triangle, the sum of two sides is always greater than the third side.
If the third side is equal to the sum of two sides then it will be a straight line rather than a triangle.
It means 10 + 14 > third side
24 cm > third side
Hence "A side of any triangle is less than the sum of the other two sides so the third side must be less than 24cm".
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a sample of radioactive material emits 400000 particles over a period of 20 minutes calculate the activity of the source in Becquerel
The activity of the source in Becquerel is 333.3Bq
What is Activity ?The number of nuclei that disintegrate or decay per unit time is known as Activity.
Given that a sample of radioactive material emits 400000 particles over a period of 20 minutes.
N = 400000 particlest = 20 min = 20 x 60 = 1200 sActivity A = dN/dt
A = 400000 / 1200
A = 333.3 particles / s
A = 333.3 Bq
Therefore,
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Which of the following parts of a motor cycle is there only to give the feedback ( information) to the driver?
The brake light is a part of the motorcycle which is there only to give the feedback ( information) to the driver.
What is a Motorcycle?This is referred to as a type of vehicle which has only two wheels and is without pedals. it is used in the transportation of people and goods from one location to another.
This vehicle has different parts and an example is the brake light which denotes that the driver is slowing down as a result of the brake being pressed which helps to reduce sand eliminate incidences of collisions and other forms of accident.
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A copper wire is 40.93 cm long and weighs 1.141 g. the density of copper is 8.933 g/cm3 . what is the radius of the wire in millimeters?
The radius of the wire in millimeters is 0.33 mm.
The length of the copper wire is l.
l = 40.93 cm
The mass of the copper wire is m.
m = 1.141 g
The density of the copper is p.
p = 8.933 g/cm³
The volume of the copper of the wire is,
[tex]Density = \frac{ Mass}{ Volume}[/tex]
[tex] Volume = \frac{Mass}{ Density}[/tex]
[tex]v = \frac{m}{p} [/tex]
[tex]v = \frac{1.141}{8.933}[/tex]
= 0.15 m³
The volume of the copper wire is 0.15 m³.
The radius of the copper wire is,
The volume of the wire = π × (radius)² × height
v = π × r² × l
[tex]r ^{2} = \frac{v}{\pi \times l} [/tex]
[tex] r ^{2} = \frac{7 \times 0.15}{22 \times 40.933} [/tex]
r = 0.033 cm
The radius of the copper wire is 0.033 cm.
The radius of the copper wire in millimeters is,
1 cm = 10 mm
0.033 cm = 0.33 mm
Therefore, the radius of the wire in millimeters is 0.33 mm.
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A+2.0-microf+capacitor+that+is+initially+uncharged+is+charged+through+a+50-kilo-ohm+resistor.+how+long+does+it+take+for+the+capacitor+to+reach+90%+of+its+full+charge?
A 2.0 micr of capacitor that is initially uncharged is charged through a 50-kilo ohm resistor, it will take a time of 2.3sec to charge 90%.
What is the formula for a capacitor’s charging?C or Q may be equal. Thus, the charge needed to raise a conductor’s potential through unity is numerically equivalent to the conductor’s capacitance.
What occurs as the capacitor charges?There is no current flowing across the circuit when a capacitor is fully charged. This is true because the voltage source’s potential difference across the capacitor is also equal.
In other words, the charging current reaches zero and the capacitor voltage equals the source voltage.
The charge present on the capacitor is changing in time as follows:
q(t)=qo (1−e−tRC)
Here,
• qo is provided as the maximum charge on the capacitor.
• R=50000 Ω is the resistor value.
• C=2⋅10−6 F is the capacitance of the capacitor.
Solving for the time, we obtain:
t=−RCln(1−qq0)
Here,
• q=0.9qo is the charge on the capacitor at the moment t;
The Computation yields:
t=−5⋅10^4Ω⋅2⋅10^-6 F⋅ln(1−0.9q0)
≈0.23 s
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What is the symbol, atomic number, # of protons, # of electrons, atomic mass, rounded atomic mass, # of neutrons (show work), and period of: helium
The symbol of the element helium is He, its proton number is 2, its atomic mass is 4, its neutron number is 2 and finally; helium belong to period 1 of the periodic table.
However, helium is a noble gas, meaning it has a stable octet electronic configuration ( having 8 valence electrons)
According to the periodic table, helium belong group 0 of the periodic table which is the 8th group. It belongs to period 1
Chemical elementsA chemical element refers a chemical substance which cannot be split into simpler units by chemical ordinary means.
Elements in the periodic table are generally categorized as metals, nonmetals and metalloids.
In addition, an atom is the smallest part of element which can take part in a chemical reaction.
Some examples of elements are as follows including their symbols
Hydrogen, HHelium, HeLithium, LiBeryllium, BeBoron, BCarbon, CNitrogen, NOxygen, OFluorine, FNeon, NeSodium, Na Magnesium, MgAluminum, AlSilicon, SIPhosphorus, PSulphur, SChlorine, ClArgon, ArPotassium, KCalcium, CaSo therefore, the symbol of the element helium is He, its proton number is 2, its atomic mass is 4, its neutron number is 2 and finally; helium belong to period 1 of the periodic table.
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The north american and european continents are moving apart at a rate of about 3 cm/y. at this rate how long in years will it take them to drift 484 km farther apart than they are at present?
1.6133 long will take it to drift than that at present.
Explanation:We use V = S/T
Where v = velocity
S= distance
T= time
We can rework this to T=S/V
Given that 3cm/y converts into m
1m = 0.01 *3
3m/y
1km = 1000m
484000 m
Now, T=S/V
T = 484000/0.03
T = 16133333.33 x [tex]10^{-7}[/tex]
T = 1.6133
What is the rate that North America and Europe are moving apart?
about 3 cm per year
SSM Due to continental drift, the North American and European continents are drifting apart at an average speed of about 3 cm per year.
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Atoms that combine in What plsss
When atoms combine to form covalent bonds, the resulting collection of atoms or group of atoms is called a molecule.
How does atom combine?
Atoms can combine with each other through sharing of the electrons, donating the electrons etc. to make molecules.
When atoms combine by forming covalent bonds, the resulting collection of atoms is called a molecule. We can therefore say that a molecule is the simplest unit of a covalent compound.
Thus, when atoms combine to form covalent bonds, the resulting collection of atoms or group of atoms is called a molecule.
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A rectangular lake has a width of 6.0 x 10^3 m and a length of 1.2 x 10^4 m. What is the area of the lake in scientific notation
Considering the defintion of area of a rectangle and multiplication in scientific notation, the area of the lake is 7.2×10⁷ m².
Definition of areaArea is the measure of the region or surface enclosed by a geometric figure.
Area of a rectangleA rectangle is a flat geometric figure with four sides, of which two sides that are opposite parallel to each other have the same length and the remaining two have another length.
The area of a rectangle is calculated from the two different sides (a and b). It is the product of the two contiguous sides of the rectangle:
Area of a rectangle= a×b
where a and b are the measures of the two sides.
Area of the lakeIn this case, you know that a rectangular lake has:
a width of 6.0×10³ m.a length of 1.2×10⁴ m.Then, the area of the lake can be calculated as:
Area of the lake= 6.0×10³ m× 1.2×10⁴ m
To multiply numbers in scientific notation, you multiply the numbers that are not powers of 10 and add the exponents that are powers of ten. In this case:
Area of the lake= (6.0× 1.2)×10³⁺⁴ m²
Area of the lake= 7.2×10⁷ m²
Finally, the area of the lake is 7.2×10⁷ m².
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_______________ carries the electrons from nadh dehydrogenase to cytochrome c reductase.
NADH carries the electrons from NADH dehydrogenase to cytochrome c reductase.
Nicotinamide adenine dinucleotide (NAD) and hydrogen (H) are two molecules that naturally occur in the body and are involved in the chemical reaction that produces energy. Supplements containing NADH are used medically.
NADH is used to treat dementia and Alzheimer's disease as well as to enhance mental clarity, alertness, attention, and memory. NADH is utilized to treat chronic fatigue syndrome and enhance athletic performance due to its function in energy production (CFS).
Our bodies' production of NADH is involved in the body's process of generating energy. While there is some data that supports NADH supplements may lower cholesterol, lower blood pressure, aid in the treatment of chronic fatigue syndrome by supplying energy, and improve Parkinson's disease patients' nerve signals.
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NADH carries the electrons from NADH dehydrogenase to cytochrome c reductase.
Nicotinamide adenine dinucleotide (NAD) and hydrogen (H) are two molecules that naturally occur in the body and are involved in the chemical reaction that produces energy. Supplements containing NADH are used medically.
NADH is used to treat dementia and Alzheimer's disease as well as to enhance mental clarity, alertness, attention, and memory. NADH is utilized to treat chronic fatigue syndrome and enhance athletic performance due to its function in energy production (CFS).
Our bodies' production of NADH is involved in the body's process of generating energy. While there is some data that supports NADH supplements may lower cholesterol, lower blood pressure, aid in the treatment of chronic fatigue syndrome by supplying energy, and improve Parkinson's disease patients' nerve signals.
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A small exercise area for dogs is 27 meters long and 3.2 meters wide. What is the area of the dog run in square meters?
The area of the dog run in square meters is 86.4 m².
What is the area of a shape?The area of a given shape is the amount of space enclosed within the given shape.
The area of different shapes is calculated using different formulas.
Some formulas for calculating the area of shape area;
Area of Square = side * sideArea of rectangle = length * breadthArea of circle = πr²The given exercise area is a rectangle.
The area of the exercise area = length * breadth
Length = 27 m
breadth = 3.3 m
Area = 27 * 3.2
Area = 86.4 m²
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It takes 100 j of work to stretch a spring 1 m from its equilibrium position. how much work is needed to stretchit an additional 1 m?
By using Hooke's Law, the work done is 400 joule.
We need to know about Hooke's Law to solve this problem. Hooke's Law describes the force applied to spring (elastic materials) will proportional to spring constant and displacement under the elastic condition. It can be described as
F = k . x
where F is force, k is spring constant and x is displacement.
The potential energy of spring can be determined as
PE = 1/2 . k . x²
where PE is potential energy
From the question above, we know that
PE1 = 100 J
x1 = 1 m
x2 = x1 + 1 m = 2 m
Potential energy is proportional to squared displacement, the ratio of PE can be written as
PE1 / PE2 = x1² / x2²
100 / PE2 = 1² / 2²
PE2 = 400 joule
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A 14 carbon-long hydrocarbon chain with a single c=c double bond between the third and fourth carbon and carboxyl group at one end is called:______
A monounsaturated fatty acid is a 14 carbon-long hydrocarbon chain with a single c=c double bond between the third and fourth carbon and carboxyl group at one end.
MUFAs, or monounsaturated fatty acids, are a form of unsaturated fat. Fatty acids are lipid macromolecules composed of a hydrocarbon and a terminal carboxylic acid. Fatty acids are classed as lipids because they are nonpolar and hydrophobic. It can be used as an energy source by the organism through beta-oxidation in the mitochondria. Triacylglycerol also contains fatty acids. The term "mono," which means "one," refers to the fact that monounsaturated fats have only one double bond. Plant foods and animal products both include monounsaturated fat.
Olive oil is a healthy example of monounsaturated fat that many people are familiar with. At normal temperature, these lipids are generally liquid, but when cold, they solidify. Monounsaturated fats, like all other forms of fats, include nine calories per gram. Myristoleic acid is the chemical name for a 14-chain monounsaturated fatty acid (MUFA).
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Iodine-131 has a half-life of 8.0 minutes. how many half-lives will pass in 120 minutes?
By the half-life of radioactive, the Iodine-131 experienced 15 half-lives.
We need to know about the half-life of the radioactive elements to solve this problem. The radioactive element will decay over time and follow the equation
N = No(1/2)^(t/t'')
where N is the final quantity, No is the initial quantity, λ is the decaying constant, t is time and t'' is the half-life of a radioactive element.
From the question above, we know that
t'' = 8 min
t = 120 min
Calculate the remaining mass
N = No(1/2)^(t/t'')
N = No(1/2)^(120/8)
N = No / 32768
As we know that half-lives is (No / (2^n)), Hence
N = No / 32768
N = No / 2^(²log(32768))
N = No / 2¹⁵
Hence, the Iodine-131 experienced 15 half-lives.
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Any object that is falling through the air is called...
Answer:
Any object that is falling through the air is called a projectile
what is the slope method
Answer: The Slope method calculates the flowrate of material in each stream from the slope of the moving cumulative sum with respect to time.
Explanation: hope this helps!!!!
Activity no. 2 You can do it!
Title: Select and prepare frults/ vegetables for Jam, jelly, and marmalade making.
Directions: Perform the following tasks. Place your answer in the boxes provided.
●
Draw the preparatory methods in making sugar concentrates such as washing and
cleaning, peeling, and cutting the fruits.
WASHING & CLEANING
PEELING
CUTTING
Jams, marmalades, preserves, and conserves are fruit merchandise preserved with the aid of sugar. these merchandises fluctuate in gel consistency, substances, and the way the fruit is ready. they're easy to make at home. Jams are made from crushed or ground fruit and commonly have a thick consistency due to excessive pectin content material.
Jelly is a semisolid aggregate of fruit juice and sugar that is clear and firm enough to hold its form. The fruit gives every unfold its precise flavor and color. It additionally components the liquid to dissolve the relaxation of the important elements and furnishes some or all of the pectin and acid. high best, flavorful fruits make the fine jellied merchandise.
Marmalade is a fruit hold crafted from the juice and peel of citrus end result boiled with sugar and water. it is able to be made out of lemons, limes, grapefruits, mandarins, sweet oranges, bergamots, and other citrus end results, or any aggregate thereof marmalades.
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Light with a frequency of 7. 30 x 1014 hz lies in the violet region of the visible spectrum. What is the wavelength of this frequency of light?.
According to electromagnetic waves, the wavelength of light is 410.96 nm.
We need to know about electromagnetic waves to solve this problem. Electromagnetic waves can propagate without media. The speed of electromagnetic in vacuum media is equal to the speed of light. Hence, the wavelength and frequency can be determined as
c = λ . f
where c is the speed of light (3 x 10⁸ m/s), λ is wavelength and f is frequency.
From the question above, we know that
f = 7.3 x 10¹⁴ Hz
By substituting the given parameter, we can calculate the frequency of microwaves
c = λ . f
λ = c / f
λ = 3 x 10⁸ / 7.3 x 10¹⁴
λ = 4.1096 x 10¯⁷ m
λ = 410.96 x 10¯⁹ m
λ = 410.96 nm
Hence, the wavelength of the light is 410.96 nm.
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A bicycle has a constant velocity of 10 m/s. a person starts from rest and runs to catch up to the bicycle in 30 s. what is the acceleration of the person?
The person running from rest that catch up the bicycle in 30 s has an acceleration of: 0.66 m/s²
The formulas and procedures we will use to solve this exercise are:
v = x/ta = 2 * [x - (vi * t)] / t²Where:
v= velocityx = distancet = timevi = initial velocitya = accelerationInformation about the problem:
v(bicycle)= 10 m/sx(bicycle) =? t = 30 svi(person)= 0 m/sa(person)=?Applying the velocity formula and clearing the distance we have:
v = x/t
x = v * t
x(bicycle) = 10 m/s * 30 s
x(bicycle) = 300 m
With the distance the bicycle has traveled in 30 s we can calculate the person's acceleration
Applying the acceleration formula we have:
a = 2 * [x - (vi * t)] / t²
a = 2 * [300 m - (0 m/s * 30 s)] / (30 s)²
a = 2 * [300 m - (0 m)] / 900 s²
a = 600 m - 0 m / 900 s²
a = 600 m / 900 s²
a = 0.66 m/s²
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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A measure of the number of links between one object and another object in a relationship is called the _______.
A measure of the number of links between one object and another object in a relationship is called the cardinality.
The number of cardinal (fundamental) members of a set is referred to as cardinality. A non-negative integer can have a limited or infinite degree of cardinality. For instance, the number of people living in the United States has a cardinality of about 270,000,000, whereas the number of integers has an unbounded cardinality.
Think about set A. If A only contains a limited number of elements, then A's cardinality is equal to A's element count. For instance, |A|=5 if A=2,4,6,8,10.
The empty set has a cardinality of 0, which is zero. When we write #=0, it means either "the cardinality of the empty set is zero" or "the empty set has no elements."
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A cart of mass 20kg is sitting on the floor, you push it and it has an acceleration of 3 m/s2, how much force did you apply to it?
Answer:
60N
Explanation:
Fnet=m.a
Fnet=(20)(3)
Fnet=60N
9. What do the results tell you about your hypothesis
The results tell you about your hypothesis and whether the assumptions about the problem are correct and aligned with the experimental results or not.
What is the scientific claim?Scientific claims are statements made in science based on an experiment.
If your theory is confirmed, you may come up with methods to improve it and test those ideas. In either case, the act of experimenting frequently generates entirely new issues to research.
The outcomes inform you of your hypothesis and whether or not your problem-solving presumptions are accurate and consistent with the experimental outcomes.
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What is the percent uncertainty in the measurement 5.8 +_ 0.25 m
The percent uncertainty in the measurement ( 5.8 ± 0.25 m) is 4.31%.
By definition, a percentage is a value out of a possible 100. The measurement's absolute error is multiplied by the measurement's value to determine the percentage. The result is then multiplied by 100.
Percent uncertainty:
Uncertainty is stated as a percentage, or fractional uncertainty is fractional uncertainty multiplied by 100.
Consider the measurement,
5.8 ± 0.25 m
Let 5.8 ± 0.25 m = x ± Δx
Then,
x = 5.8 and Δx = 0.25
The percent uncertainty will be:
% uncertainty = [ Δx / x ] × 100
% uncertainty = [ (0.25 m) / ( 5.8 m) ] × 100
% uncertainty = ( 0.04310344827 ) × 100
% uncertainty = 4.31 %
Therefore, the percent uncertainty of the measurement 5.8 ± 0.25 m is 4.31 %.
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Three seconds after a gun is fired, the person who fired the gun hears an echo. how far away (in m) was the wall that reflected the sound of the gunshot? assume the speed of sound is 343 m/s.
The faraway was that reflected the sound of gunshot is 510m.
A sort of energy created by vibrations is sound. The vibration of an object causes the molecules of the air around it to move. These molecules collide with molecules nearby, causing those molecules to vibrate as well. As a result, they collide with more surrounding air molecules. Divide the sound's speed by the amount of time needed to hear the echo to determine how far the surface is. 1020 m/s equals 340 m/s divided by 3 s.
1020/3= 340 m/s
The distance should be divided by 2, though, as the sound is reflected. Received upto
510m that is
1020/2 = 510m
In order to evaluate the exposure to gunfire sound, the peak sound pressure level (SPL), spreading of the pressure wave, and other physical features of the impulse noise from firearms were researched in real-world shooting scenarios
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Henry heavyweight weighs 1700 n and stands on a pair of bathroom scales so that one scale reads twice as much as the other
The scales readings are 1133.3 N and 566.6 N.
Weight = 1700 N
Calculating the scale reading is necessary.
We are aware that he weighs twice as much on one scale, for a total of 1700 N. These can be expressed as two concurrent equations.
W=scale1+scale2
1700=scale1+scale2...(i)
scale1=2x scale2...(ii)
Put the value from equation (II) into equation (I)
1700=2x scale2+scale2
1700=3scale2
[tex]scale2=\frac{1700}{3}[/tex]
scale2= 566.66 N
Put the value from equation (II) into equation (I)
1700= scale1+566.66
scale1= 1700-566.66
scale1= 1133.33N
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When using the high-low method, should you base the high and low observations on the dependent variable or on the cost driver?
Option B) cost driver
10-9 In a cost function, the dependent variable and the cost driver are the lines of causality. In the high-low strategy, picking the highest and lowest observations of the cost driver is therefore suitable.
When should the high low approach not be used?If the highest and lowest activity levels reflect the company’s general cost pattern, the high-low technique can be reasonably accurate. However, the high low technique will give false results if the two extreme activity levels are systematically different.
How does the high-low approach work?Find the activity with the highest cost and highest operational unit.
Add the highest activity to the variable cost per unit.
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A bicyclist accelerates at a constant rate from a standstill to 15 km/hr in 72 sec. a) how fast is the bicyclist traveling after 55 sec? b) how far has the bicyclist traveled after 72 sec?
A cyclist who accelerates steadily from a stop to 15 km/hr in 72 seconds would reach 4.167 meters per second after 55 seconds.
What is Velocity?The total displacement covered by any object per unit of time is known as velocity.
As given in the problem a bicyclist accelerates at a constant rate from a standstill to 15 km/hr in 72 sec.
15 kilometers / hour = 15×1000 /3600
=4.167 meters / seconds
v = u + at
4.167 = 0 +a*72
a =4.167/72
a = 0.05787 meters /second²
Speed after 55 seconds = 0.05787*55
=3.18285 meters/ seconds
Distance after 72 seconds,
s = ut + 0.5at²
=0 + 0.5× 0.05787×72²
=150 meters
Thus, the bicyclist would have traveled 150 meters after 72 seconds.
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what is weight?write the formula of weight
Answer: The weight of an object is defined as the force of gravity on the object and may be calculated as the mass times the acceleration of gravity, w = mg.
Explanation:
