Answer:
Young modulus = 9.8 × 10⁹ N/m²
Explanation:
From the information given:
Stress = F/A
Stress = (10 × 9.8) / 0.001²
Stress = 9.8× 10⁷ N/m²
Strain = increase in length / initial length of wire
Strain = 0.02/ 2
Strain = 0.01
Now;
The Young modulus (Y)= stress/strain
Young modulus = (9.8 × 10⁷ N/m²) / 0.01
Young modulus = 9.8 × 10⁹ N/m²
Explain how ozone is both beneficial and detrimental to human health.
What is chemical equation in the picture below.
Answer:
Element
Explanation:
The Number 1 which is Ca is a calcium element that is taking part in the chemical combination.
An element is a substance made up of one kind of atom.
Calcium is an element belong to the alkali earth metals. These group of elements are found on the second group of the periodic table.
Calcium is a metal and it is a member of the s-block on the periodic table. It is combining with 2 moles of water in this chemical reaction. Calcium is made up of two valence electrons in its outermost shell.It is easier to pull a bucket of water from the well until it is inside the water but difficult when it is out of water, why??
Anyone plz tell
Answer:
Upthrust due to water is greater than that of air. Upthrust exerted by water decreases weight of body. Hence, it is easier to pull a bucket of water from the well until it is inside the water but difficult when it is out of water.
Explanation:
Answer:
When the bucket is placed inside the well and is filled with water, the water inside the well exerts an upward Buoyant Force on the bucket, being a liquid. Hence, the force exerted by gravity on the bucket as well as this buoyant force act in the opposite direction, reducing the net force on the bucket. Due to which, it is easier to lift the bucket submerged in water.
On the contrary, there is no buoyant force acting on it when it is hanging in the air, due to which we need an upward muscular force that counter-effects this gravitational force on the bucket, in order to lift it. Hence, it's a bit difficult to draw a bucket filled with water, in air.
In a binary ionic compound, the electrons are
Answer:
Transferred from one atom to another
Explanation:
In a binary ionic compound, the electrons are transferred from one atom to another, thus forming positive and negative charges on the respective atoms involved, and thereby creating electrostatic forces which thus form the ionic bond.
Answer:transfered from the metal to the nonmetal
Explanation:i took the quiz:)
If you are holding a book and you let go of it, why does it fall? Explain in terms of forces, potential energy, and kinetic energy.
Answer:
Let the mass of the book be "m", acceleration due to gravity be "g", velocity be "v" and height be "h".
Now if we are holding a book at a certain height (h), the potential energy will be maximum which is equal to mass× acceleration due to gravity× height (= mgh).
(Remember: kinetic energy =0)
Now we consider that the book is dropped, in this case a force will act downward towards the centre of the earth, Force= mass× acceleration due to gravity (F=mg). It is equal to the weight of the book.
While the book is falling, the potential energy stored in the book converts into kinetic energy and strikes the floor with the maximum kinetic energy= (1/2)×mass×velocity² (=1/2mv²).
(Remember: kinetic energy=0)
Due to this process the whole energy is conserved.
As the potential energy decreases kinetic energy increases.
A. Community
B. Organism
C. Population
D. Individual
Answer:
i think its B or D
Explanation:
its Individual or Organism
Answer:
B
Explanation:
the answer is Organism
some one please help me
Answer:
Retar is nothing but a Bad acceleration.
A 0.145 kg baseball is thrown with a velocity of 25.0 m/s. How much work was done on the baseball to bring it from rest to 25.0 m/s? [Neglect air resistance]
Answer:
45.31 J
Explanation:
We are given that
Mass of baseball , m=0.145 kg
Initial velocity, u=0
Final velocity, v=25 m/s
We have to find the work done on the baseball to bring it from rest to 25 m/s
We know that
Work done = Change in kinetic energy
Work done, W=[tex]\frac{1}{2}m(v^2-u^2)[/tex]
Using the formula
Work done, W[tex]=\frac{1}{2}(0.145)((25)^2-0)[/tex]
Work done=[tex]\frac{1}{2}(0.145)(625)[/tex]
Work done, W=45.31 J
Hence, the work done on the baseball to bring it from rest to 25 m/s
=45.31 J
If the rock was going 90m/s when it hit the ground. How many seconds would it have been falling for?
Answer:
it will hit 80
Explanation:
because evey sec
is 10
Which two statements about digital data are true?
A. A virus can change or destroy digital data that are stored on a
computer
B. It is difficult to accidentally delete the data.
C. A virus prevents digital data from being changed or stolen on a
computer.
D. The quality of copies stays the same as more copies are made.
Answer:
a & b
the others don't make sense
The two statements about digital data true are
A virus can change or destroy digital data that are stored on acomputer.
It is difficult to accidentally delete the data.What is digital information?
Digital information generally consists of data that is created or prepared for electronic systems and devices such as computers, screens, calculators, and communication devices. These information are stored by cloud.
Data is different from information because data is not yet processed but information is processed.
The two statements about digital data true are
A virus can change or destroy digital data that are stored on acomputer.
It is difficult to accidentally delete the data.Thus, the correct options are A and B.
Learn more about digital information.
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A 70-kg ice skater is standing still on the ice, when a friend tosses him a 10-kg ball that is traveling at +8 m/s. If he catches it, what would be the velocity of the person holding the ball? What type of collision is this?
Answer:+1.25 m/s
Explanation:
Given
mass of ice skater M=70 kg
mass of ball m=10 kg
the initial velocity of the ball [tex]u_1=+8\ m/s[/tex]
Conserving linear momentum
[tex]M\times0+m\timesu_1=(M+m)v\quad \quad [v=\text{combined velocity of skater and ball}][/tex]
[tex]v=\dfrac{10\times10}{80}=+1.25\ m/s[/tex]
Therefore the velocity of the person holding the ball is 1.25 m/s
This collision represents the perfectly inelastic collision where particles stick together after the collision.
which energy change is caused by an endothermic chemical reaction
Answer:
In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products. If a chemical reaction absorbs as much energy as it releases, it is called isothermic—there is no net energy change
Explanation:
Answer:
Absorption of thermal energy
Explanation:
A P E X
A uniform plank of 5 m is rested across the banks of a stream the plank weighs 50 N how far from the center would the weight appear to act
Answer:
kenaoaccff da di rumah aja deh biar aman aja nih orang bikin emosi mudah marah sama aja deh kalo gue juga bingung nih anak gaul banget
If two objects each with a mass of 3.9 x103 kg, produce a gravitational force between them of 5.9x10-5 N, what is the distance between them?
Answer:
9.6m
Explanation:
Given parameters:
Gravitational force = 5.9 x 10⁻⁵N
Their masses = 3.9 x 10³kg
Unknown
Distance or separation = ?
Solution:
Both of the spherical objects have the same mass as indicated in the problem.
From the newton's law of universal gravitation:
F = [tex]\frac{G m1 m2}{r^{2} }[/tex]
F is the gravitational force
G is the universal gravitation constant = 6.67 x 10⁻¹¹
m1 is the mass of object 1
m2 is the mass of object 2
r is the distance between them
Since m1 = m2 = m
So;
5.9 x 10⁻⁵ = [tex]\frac{6.67 x 10^{-11} x 3.9 x 10^{3} x 3.9 x 10^{3} }{r^{2} }[/tex]
Therefore;
r = 9.6m
please help- it’s a 15 point change to my grade.
Answer: Everything except heat and density
Explanation:
A 57 kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.1 m/s. The acceleration of gravity is 9.8 m/s 2 . Find her altitude as she crosses the bar. Neglect air resistance, as well as any energy absorbed by the pole. Answer in units of m.
Answer:
Her altitude as she crosses the bar, h₂ is approximately 6.1 m
Explanation:
The given parameters of the motion of the pole vaulter are;
The mass of the pole vaulter, m = 57 kg
The speed with which the pole vaulter is running, u = 11 m/s
The speed of the pole vaulter when she crosses the bar, v = 1.1 m/s
The acceleration due to gravity, g = 9.8 m/s²
From the total mechanical energy, M.E. equation, we have;
M.E. = P.E. + K.E.
Where;
P.E. = The potential energy of the motion = m·g·h
K.E. = The kinetic energy of the motion = 1/2·m·v²
By the principle of conservation of energy, we have;
The change (loss) in kinetic energy, ΔK.E. = The change (gain) in potential energy, ΔP.E.
ΔK.E. = 1/2·m·(v² - u²)
ΔP.E. = m·g·(h₂ - h₁)
Where;
h₁ = The ground level = 0 m
h₂ = The altitude with which she crosses the bar
∴ 1/2·m·(v² - u²) = m·g·(h₂ - h₁)
(h₂ - h₁) = (v² - u²)/(2·g) = (11² - 1.1²)/(2·9.8) = 6.11173469388
h₂ = 6.11173469388 + h₁ = 6.11173469388 + 0 = 6.11173469388
h₂ = 6.11173469388
Her altitude as she crosses over the bar, h₂ ≈ 6.1 m.
what is mass and on which factor does it depend
8: As a grade-school project, students construct a mobile representing some of the major food groups.
Their completed artwork is shown below. Find the masses mi, m2, and m3 that are required for a
perfectly balanced mobile.
Answer:
m1=0.72kg m2=0.48kg m3=0.98
Explanation:
12*m1=18*m2, so 2*m1=3*m2
6*(m1+m2)=24*.03, so 2*m1+2*m2=2.4
so, 5*m2=2.4, m2=0.48 then, m1=0.72
(m1+m2+0.3+0.2)*18=31*m3
1.7*18=31*m3
m3=0.98
What is the correct definition of a hypothesis
Answer:
Hypothesis is simply a theory given on something which may be correct or not.
A 1000 kg car is traveling at a constant speed of 30 m/s . How much energy is transferred to thermal energy when the car comes to a stop?
an object that has potential energy may have this energy because of its:
- acceleration
-location
-momentum
-speed
Answer:
Location
Explanation:
Potential energy is the energy stored in an object due to its position. The most common type of potential energy - gravitational potential energy - is the energy stored in an object due to its vertical position relative to the ground or some zero level.
What is potential energy ?
"An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position." This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position.
What is energy ?
"Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms."
Know more about potential energy here
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Give two
ways the skaters may be
accelerating
(if im wrong just report my answer)
the main ways I would suspect them proppeling forward would be by putting their foot down and pushing with it or my going downhill.
A large pendulum swings in the lobby of the United Nations building in New York City. The pendulum has a 91-kg gold-plated bob and a length of 22.9 m. Assume g = 9.81 m/s2.
Part A
How much time does it take for the bob to swing from its maximum displacement to its equilibrium position?
Express your answer to three significant figures and include the appropriate units.
Answer:
t = 2.40 s
Explanation:
It just told me
an aeroplane takes off from a runway by covering a distance of 1200 metre in 90s.what is the average speed of aeroplane
Answer:
[tex]\displaystyle \bar v=13.33\ m/s[/tex]
Explanation:
Average Speed
The speed of an object is the rate of change of its distance. When an object travels at different speeds over time, the average speed is usually calculated to represent the whole travel.
The average speed is the total distance (d) traveled by the object divided by the elapsed time to cover that distance (t):
[tex]\displaystyle \bar v=\frac{d}{t}[/tex]
The airplane covers a distance of d=1200 m in t=90 s. The average speed is:
[tex]\displaystyle \bar v=\frac{1200}{90}[/tex]
[tex]\boxed{\displaystyle \bar v=13.33\ m/s}[/tex]
Answer:
13.333 m/s
Explanation:
speed = distance/time
= 1200/90 = 13.33 m/s
This item has two parts. First answer Part A. Then answer Part B. (2 points)
1. Organisms with beneficial variations are better able to survive and reproduce.
II. The accumulation of many changes over time can lead to the evolution of new
species
III. A variety of beneficial variations accumulate in a population over time.
IV. Mutations and sexual reproduction create random changes in a population.
Part A
What is the correct order of the steps (listed above) explaining the process leading to evolution?
I don't know eithier sorry im only in the 5th and i have the same work as you
An astronaut has a mass of 95 kg. Calculate his weight on Earth.
Explanation:
mass(m)=95kg
gravity(g)=9.8m/s²
weight(w)=?
now,
w=m×g
=95×9.8
=931N
hope it helps.
Answer:
95x 0.9 = 85.5 is your answer
Explanation:
you multiply the number you have with the weight of the earth which is 0.9 and you will get 85.5
Why would a flare be observed in visible light, when they are so much brighter in X-ray and ultraviolet light?
Answer:
Because it radiates a spectre of frequencies, this means that it radiates in a continuous range of frequencies, ones with more intensity (like x-ray and ultraviolet) and others with less intensity (like the visible light). While most of the radiation is not in the visible range, there still is a part of the radiation in the visible spectre. And while this part is not the most intense part, the radiation is so large that we can see a very bright visible light.
Two cars are driving at the same velocity, but one has twice the mass of the other. Is the mechanical kinetic energy of the larger car two times, three times, or four times that of the smaller car
Answer:
The kinetic energy of the larger car is two times that of the smaller car
Explanation:
Kinetic Energy
Is the energy an object has due to its state of motion. It's proportional to the square of the speed.
The equation for the kinetic energy is:
[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
It's required to compare the kinetic energy of two cars K1 and K2. Car 2 has twice the mass of car 1: m2=2m1, and they have the same speed.
The kinetic energy of car 1 is:
[tex]\displaystyle K_1=\frac{1}{2}m_1v^2[/tex]
The kinetic energy of car 2 is:
[tex]\displaystyle K_2=\frac{1}{2}m_2v^2[/tex]
Substituting the relation of the masses:
[tex]\displaystyle K_2=\frac{1}{2}(2m_1)v^2[/tex]
Rearranging:
[tex]\displaystyle K_2=2\left(\frac{1}{2}m_1v^2\right)[/tex]
Substituting the kinetic energy of car 1:
[tex]\displaystyle K_2=2K_1[/tex]
The kinetic energy of the larger car is two times that of the smaller car
What is the volume of a cone with a height of 27cm and a radius of 13cm? And your answer to the nearest tenth
Answer:
the volume of the cone is [tex]4778.36 cm^3[/tex]
Explanation:
The computation of the volume of the cone is shown below:
As we know that
The Volume of the cone is
r denotes the radius
And, h denotes the height
So,
[tex]= \frac{1}{3} \pi r^2 h \\\\= \frac{1}{3} \times 3.14 \times 13^2 \times 27\\\\= 4778.36 cm^3[/tex]
Hence, the volume of the cone is [tex]4778.36 cm^3[/tex]
intensity of an earthquake is gennerally hingher near the
Answer:
near the epicenter.
Explanation:
Earthquake intensity is a ranking based on the observed effects of an earthquake in each particular place. Therefore, each earthquake produces a range of intensity values, ranging from highest in the epicenter area to zero at a distance from the epicenter.
