Answer: It is matter
Explanation:
Answer:
D
Explanation:
Trust me, I just did the test. :) :) :)
Which action will decrease the gravitational force between two objects?
A. Reducing the masses of the objects
B. Increasing the charge on one of the objects
C. Adding mass to one of the objects
D. Moving the objects closer together
A reduction of the masses of the objects.
Answer:
Which action will decrease the gravitational force between two objects?
A.
Explanation:
Carry On Learning
An object has 23 Kg*m/s of momentum and a mass of 3 Kg. What is the objects velocity
Answer:
23 m/s
Explanation:
A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air? Part 1 of 2 The speed of the plane in still air is Part 2
The speed of the wind is 17 mph and the speed of the plane in still air is 119 mph.
Let the speed of the plane be x and the speed of the wind be y. Then, the speed of the plane with the wind becomes x + y, while the speed of the plane against the wind is x - y.
The distance traveled with the wind in 3 hours is 408 miles.
Therefore, we can write the equation as:
3(x + y) = 408
Divide both sides by 3:
x + y = 136 .... (1)
The distance traveled against the wind in 4 hours is also 408 miles.
Therefore, the equation can be written as:
4(x - y) = 408
Divide both sides by 4:
x - y = 102 .... (2)
Now we can solve these two equations using the elimination method.
Add equations (1) and (2):
x + y + x - y = 136 + 1022x = 238x = 119 mph
Therefore, the speed of the plane in still air is 119 mph.
Now, substitute this value of x in equation (1):
119 + y = 136y = 17 mph
Therefore, the speed of the wind is 17 mph.
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The correct question is:
A plane flies 408 mi with the wind in 3 hr. The return trip takes 4 hr. What is the speed of the wind and the speed of the plane in still air?
the uncertainty in measuring location of a neutron is 1.22 x 10-3 m. calculate the uncertainty in the speed
The Neutron mass uncertainty is equal to 1.675 x 10–27 kg.
What is neutron?Neutron, neutral subatomic particle that is a constituent of every atomic nucleus except ordinary hydrogen. It has no electric charge and a rest mass equal to 1.67492749804 × 10−27 kg—marginally greater than that of the proton but 1,838.68 times greater than that of the electron. Neutrons and protons, commonly called nucleons, are bound together in the dense inner core of an atom, the nucleus, where they account for 99.9 percent of the atom’s mass.Developments in high-energy particle physics in the 20th century revealed that neither the neutron nor the proton is a true elementary particle. Rather, they are composites of extremely small elementary particles called quarks. The neutron is composed of two down quarks, each with 1/3 elementary charge, and one up quark, with 2/3 elementary charge.To learn more about protons refer to:
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A metal plate is heated so that its temperature at a point (x,y) is T(x,y)=x2e−(2x2+3y2).
A bug is placed at the point (1,1).
The bug heads toward the point (2,−4). What is the rate of change of temperature in this direction? (Express numbers in exact form. Use symbolic notation and fractions where needed.)
To find the rate of change of temperature in the direction from (1, 1) to (2, -4), we need to calculate the gradient of the temperature function T(x, y) and then evaluate it at the starting point (1, 1).
Given:
T(x, y) = x^2 * e^(-(2x^2 + 3y^2))
The gradient of T(x, y) is given by:
∇T(x, y) = (∂T/∂x) * i + (∂T/∂y) * j
Taking the partial derivatives:
∂T/∂x = 2xe^(-(2x^2 + 3y^2)) - 4x^3e^(-(2x^2 + 3y^2))
∂T/∂y = -6xye^(-(2x^2 + 3y^2))
Now we can evaluate the gradient at the point (1, 1):
∇T(1, 1) = (2e^(-5) - 4e^(-5)) * i + (-6e^(-5)) * j
The rate of change of temperature in the direction from (1, 1) to (2, -4) is equal to the dot product of the gradient at (1, 1) and the unit vector pointing from (1, 1) to (2, -4). Let's calculate this:
Magnitude of the direction vector:
||(2, -4) - (1, 1)|| = ||(1, -5)|| = sqrt(1^2 + (-5)^2) = sqrt(1 + 25) = sqrt(26)
Unit vector in the direction from (1, 1) to (2, -4)
u = (1/sqrt(26)) * (2-1, -4-1) = (1/sqrt(26)) * (1, -5) = (1/sqrt(26), -5/sqrt(26))
Dot product of the gradient and the unit vector
∇T(1, 1) · u = [(2e^(-5) - 4e^(-5)) * (1/sqrt(26))] + [(-6e^(-5)) * (-5/sqrt(26))]
Calculating the value:
∇T(1, 1) · u = [(2e^(-5) - 4e^(-5)) / sqrt(26)] + [(6e^(-5)) / sqrt(26
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How much work was a baby doing if she used a force of 2N and pulled her rattle for 1.3 M?
what is the defining property of the trojan asteroids?
The defining property of Trojan asteroids, therefore, is their orbital relationship with a planet and their confinement to stable Lagrange points, distinguishing them from other asteroids that follow independent orbits in the Solar System.
The defining property of Trojan asteroids is their unique orbital relationship with a larger celestial body, typically a planet. Trojan asteroids are a group of small celestial bodies that share the same orbit as a planet, either preceding it or following it in its path around the Sun. These asteroids are situated in stable regions known as Lagrange points, specifically the L4 and L5 Lagrange points.
The L4 and L5 Lagrange points are positions in a planet's orbit where the gravitational forces of the planet and the Sun balance out, creating stable regions where objects can remain relatively stationary. Trojan asteroids are trapped in these Lagrange points, forming clusters or swarms around these stable regions.
The most well-known example of Trojan asteroids is found in the orbit of Jupiter, where thousands of Trojan asteroids have been discovered. Similarly, Trojan asteroids have also been identified in the orbits of other planets, including Mars, Neptune, and Earth.
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Helloo. I need help with this Physics question:
Three resistors of resistance 4 ohm, 6 ohm and 12 ohm are connected in parallel. This parallel arrangement is connected in series with a resistance of 1 ohm and a cell of e.m.f 1.5V. Calculate the current in the circuit.
Answer:
0.5 A.
Explanation:
The three resistors of resistance 4 ohm, 6 ohm and 12 ohm connected in parallel will have an equivalent resistance of:
\(\tt \frac{1}{R}=\frac{1}{4}+\frac{1}{6}+\frac{1}{12}\)
\(\tt \frac{1}{R}=\frac{1*6+1*4+1*2}{24}=\frac{12}{24}=\frac{1}{2}\)
while doing Criss cross multiplication:
we get,
R=2 ohm
The equivalent resistance of the parallel arrangement is connected in series with a resistance of 1 ohm,
so the total resistance of the circuit is 2+1= ohm.
The current in the circuit is calculated using the following formula:
\(\boxed{\boxed{\tt I =\frac{V}{R}}}\)
Where:
I is the currentV is the voltageR is the resistanceIn this case, the voltage or e.m.f is 1.5 V and the resistance is 2 ohms, so the current is:
\(\tt I =\frac{ 1.5 \:V }{3\: ohm} = 0.5 A\)
Therefore, the current in the circuit is 0.5 A.
Which of the following statements about density is true.
there is nothing there
I
dont know how they got to the answer.
Which hydrogen transition represents the ABSORPTION of a photon in the UV portion of the electromagnetic spectrum? A. n= 4 to n=1 B. n= = 2 to n=3 C. n=3 to n= 5 D. n=3 to n=2 E. n=1 to n = 4 Which
The hydrogen transition that represents the absorption of a photon in the UV portion of the electromagnetic spectrum is Option E: n=1 to n=4.
In the hydrogen atom, the energy levels of the electrons are quantized, and transitions between these energy levels result in the emission or absorption of photons. The energy of a photon is directly related to the difference in energy between the initial and final states of the electron.
In this case, the transition from n=1 to n=4 represents the absorption of a photon in the UV portion of the electromagnetic spectrum. When an electron in the hydrogen atom absorbs a photon, it gains energy and jumps from the ground state (n=1) to the higher energy state (n=4). This transition corresponds to the absorption of UV light.
The energy of the photon absorbed is equal to the difference in energy between the n=4 and n=1 levels. The energy difference increases as the electron transitions to higher energy levels, which corresponds to shorter wavelengths in the UV portion of the electromagnetic spectrum.
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Which statement describes how the motion of the water particles differs from the
motion of the wave?
O A. The particles of water move away from the disturbance without ever
returning, while the wave vibrates back and forth within a fixed position.
B. The particles of water vibrate and then return to the same general
position, while the wave travels away from the disturbance without
returning.
The particles of water vibrate and then return to the same general position, while the wave travels away from the disturbance without returning. The correct option is B
What is wave?Wave is a disturbance that travels through space and matter, transferring energy from one point to another.
Waves can occur in many different forms such as:
Water waves Sound waves Light waves Electromagnetic wavesThe movement of the wave is characterized by its wavelength frequency and amplitude. The wave itself does not move but rather the energy it carries moves through space. The particles in a medium through which the wave is traveling such as the water in a water wave or the air in a sound wave, move in a circular or back-and-forth motion.
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you are riding on the edge of a spinning playground merry-go-round. if you pull yourself to the center of the merry-go-round, what will happen to its rotation?
If you pull yourself to the center of the merry-go-round, the rotation of the merry go round will decrease.
What is the centripetal acceleration of a merry go round?This is the radial acceleration experienced by a person moving in a circular path as the merry-go-round rotates about its mean position.
a = v²/r
where;
v is the linear speed of the merry go roundr is the radius of the merry go rounda is the centripetal acceleration of the merry go roundFrom the formula given above, as the radius of the merry go round increases, the centripetal acceleration of the merry go round decreases.
v = ωr
where;
v is the tangential speed or linear speed of the merry go roundr is the radius of the circular path from the edgeThus, when the radius of the circular path decreases, the speed of the merry go round will decrease as well.
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Because the pressure falls, water boils at a lower temperature with increasing altitude. Consequently, cake mixes and boiled eggs, among other foods, must be cooked different lengths of time. Determine the boiling temperature of water at 1000 and 2000 m elevation on a standard day, and compare with the sea-level value
Answer:
1) The boiling point of water reduces by 3.28°C at 1,000 m above sea-level
2) The boiling point of water reduces by 6.56°C at 2,000 m above sea-level
Explanation:
The variation of the boiling point of water with elevation is given as follows
The boiling point reduces by 0.5°C for every 152.4 meter increase in elevation
At sea-level, the boiling point temperature of water = 100°C
1) At 1,000 m elevation, the boiling point temperature, T = 100 - (1,000/152.4) × 0.5 ≈ 96.72 °C
Therefore, the boiling point of water reduces by 100° - 96.72° = 3.28°C at 1,000 m above sea-level
2) At 2,000 m elevation, the boiling point temperature, T = 100 - (2,000/152.4) × 0.5 ≈ 93.44°C
The boiling point of water reduces by 100° - 93.44° = 6.56°C at 2,000 m above sea-level
does kepler's law of equal areas imply that gravity varies inversely with the square of the distance
Kepler's law of equal areas imply that gravity varies inversely with the square of the distance. (false)
What is Kepler's law?Kepler's laws of planetary motion are rules in astronomy and classical physics that describe how the planets move within the solar system. They were mostly developed by the German astronomer Johannes Kepler.
Also whose analysis of the observations of the astronomer Tycho Brαhe from the 16th century allowed him to publish his first two law in 1609 and a third law nearly ten years later, in 1618. Kepler never assigned a number to these laws or made a special distinction between them and his other discoveries.
The conservation of orbital angular momentum L is a direct result of Kepler's law of equal areas.
That law is:
\(\dfrac{\mathrm{d}A}{\mathrm{d}t}=\dfrac{1}{2m}L\)
where, dA is the area which is swept out by the radius \(\vec{r}\) and is the object's mass m in a time dt.
Since L is conserved, the radius vector's sweep of area A over time t is unaffected by the distance from the central object (the sun).
The gravitational force, which is the primary force and is directed toward the object, causes L to remain constant.
None of these facts imply that gravity varies inversely with distance squared, so the given statement is false.
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true or false: although wood is an insulator, lightning can travel through a tree to reach the earth.
The correct answer to the statement; "although wood is an insulator, lightning can travel through a tree to reach the earth" is; false.
Why light cannot travel through a wood or a treeLight cannot pass through or travel through a wood or a tree simply because wood is completely a poor conductor of heat and electricity. In order words, wood cannot conduct electricity in any manner.
That being said, substances which are good conductors of electricity are not insulators and are metals such as iron, nickel, zinc and so on and so forth.
In conclusion, it can therefore be deduced from the explanation given above that only metals call allow light to pass through them and can conduct electricity.
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what is v^2=0.05-4.9 please i need this asap
Answer:
v =2.02
Explanation:
v^2=0.05-4.9
v^2=-4.85
square root both side
v=2.02
^^^^this is a not a perfect square
100 POINTS UP FOR GRABS FOR ANYONE WILLING TO HELP! PLEASE!
Answer:
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The wavelength of a particular color of orange light is 650 nm. The frequency of this color is ____ sec-1 (1 nm = 10-9 m)
The frequency of the orange light is 4.6 x 10^14 sec^-1. To calculate the frequency, we can use the formula: frequency = speed of light / wavelength. The speed of light is approximately 3 x 10^8 m/s. However, we need to convert the wavelength from nm to m by multiplying it by 10^-9. So,
frequency = (3 x 10^8 m/s) / (650 x 10^-9 m)
frequency = 4.6 x 10^14 sec^-1
To find the frequency of the orange light with a wavelength of 650 nm, we will use the formula:
Frequency (f) = Speed of Light (c) / Wavelength (λ)
First, we need to convert the given wavelength from nanometers (nm) to meters (m) using the conversion factor 1 nm = 10^-9 m:
650 nm * (10^-9 m/nm) = 6.50 * 10^-7 m
Now, we will use the speed of light (c), which is approximately 3.00 * 10^8 m/s:
f = (3.00 * 10^8 m/s) / (6.50 * 10^-7 m)
After dividing, we get:
f ≈ 4.62 * 10^14 sec^-1
So, the frequency of this particular color of orange light is approximately 4.62 * 10^14 sec^-1.
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Why is air warmer near Earth's surface?
A.
The Sun heats Earth's surface, and in turn the air above it is heated.
B.
Warm air is more dense and sits on top of Earth's surface.
C.
Warm air is less dense and sits on Earth's surface HELP PLZ!!
Answer:
I am pretty sure it is A!
:D
The air is warmer near Earth's surface because warm air is denser and sits on top of the Earth's surface. The correct option is B.
What is air density?The mass of the air per unit volume is known as the air density. Its unit is kg/m³.
Due to the lower pressures in the air above, air expands when it rises. cooling air expands.
The hottest temperatures in the troposphere are often found at the earth's surface because the sun heats the atmosphere predominantly from the surface and because the air cools as it ascends.
Because warm air is denser and lies on top of the surface of the Earth, it is warmer near the surface of the earth.
Hence, the correct option is B.
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a particle has a constant acceleration ~a = (4 m/s 2 ) ˆ. at t = 2 sec, it has velocity ~v = (ˆı ˆ) (2 m/s). what is its velocity at t = 0?
The velocity of the particle at t = 0 is -ˆi (2 m/s).
Velocity is a measure of how fast an object is moving and in what direction. It is a vector quantity, which means that it has both magnitude (speed) and direction.
Using the equations of motion:
~v = ~v0 + ~a t
where ~v is the final velocity, ~v0 is the initial velocity, ~a is the acceleration, and t is the time interval.
~v = ~v0 + ~a t
ˆi (2 m/s) = ~v0 + (4 m/s^2) (2 sec)
~v0 = ˆi (2 m/s) - ˆi (4 m/s) = -ˆi (2 m/s)
So, the velocity of the particle at t = 0 is -ˆi (2 m/s). This means that the particle is moving in the opposite direction to the unit vector ˆi with a speed of 2 m/s.
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Describe the relationships between wavelengths and health risks.
In general, the shorter the wavelength, the greater the danger to living things. Although longer wavelengths also have their hazards, very short wavelengths, such as X-rays and gamma rays, can easily damage living tissue
What is wavelength ?UV radiation is more damaging when its wavelength is shorter. Shorter wavelength UV light, however, has a lower ability to enter skin. Three bands make up the UV area, which has a wavelength range of 100 to 400 nm. UVA (315-400 nm) (315-400 nm)
A waveform signal's wavelength is defined as the separation between two identical points (adjacent crests) in adjacent cycles as the signal travels through space or along a wire. Its length in wireless systems is typically expressed in metres (m), centimetres (cm), or millimetres (mm) (mm).
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assume that a rod-drawing operation can be carried out either in one pass or in two passes in tandem. if all die angles are the same and the total reduction is the same, will the drawing forces be different?
Unless the rod surface changes while it is between the two dies as a result of external factors like the environment or extra lubrication, the pulling forces will remain constant.
What is the physics illustration for pulling force?
In physics, tension is defined as the pulling force that is transmitted axially by a string, rope, chain, or similar object, or by each end of a rod, truss member, or other comparable three-dimensional object. Tension can also be defined as the action-reaction pair of forces acting at each end of the aforementioned elements.
The pulling force stands for what?
Every neodymium magnet has a draw force that indicates its exact strength. The draw force, which is expressed in pounds or kilograms, is the amount of force needed to remove a magnet from a steel plate that is 1/8 inch (3.175 mm) thick.
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What is weight??????????????????
Answer:
Weight is a body's relative mass, or the quantity of matter contained by it.
Explanation:
Hope this helps
Steam flows through a nozzle at mass flow rate of
m =0.1 kg/s with a heat loss of 5 kW. The enthalpies at inlet and exit are 2500 kJ/kg and 2350 kJ/kg, respectively. Assuming negligible velocity at inlet (C 1 ≈0), the velocity (C2 ) of steam (in m/s) at the nozzle exit is (correct to two decimal places)
If negligible velocity at inlet (C 1 ≈0), the velocity (C2) of steam (in m/s) at the nozzle exit is 447.21 m/s.
According to question:
The steady flow energy equation for steady flow devices
m (h1 + ((c1)2/2) + z1g) + Q = m (h2 + ((c2)2/2) + z2g) + Wcv
C1 = 0
Wcv = 0
z1 = z2
mh1 + Q = mh2 + m((C2)2/2)
m((C2)2/2) = m(h1-h2) + Q
0.1 × ((C2)2/2) × 10-3 = 0.1(2500-2350) -5
C2 = 447.21 m/s
Thus, the negligible velocity at inlet (C 1 ≈0), the velocity (C2) of steam (in m/s) at the nozzle exit is 447.21 m/s.
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A cylindrical 4. 31 kg pulley with a radius of 0. 294 m is used to lower a 6. 27 kg bucket into a well. The bucket starts from rest and falls for 3. 55 s. The acceleration of gravity is 9. 8 m/\(s^{2}\)
What is the angular acceleration of the cylindrical pulley?
Answer in units of rad/\(s^{2}\)
The net torque on the pulley can be calculated as follows:
T = I * alpha
where
I = (1/2) * m * r^2 (moment of inertia of a cylinder)
m = 4.31 kg (mass of pulley)
r = 0.294 m (radius of pulley)
alpha (angular acceleration)
The gravitational force on the bucket creates a tension in the rope, which provides the torque on the pulley.
T = (m_bucket + m_pulley) * g * r
Equating the two expressions for T and solving for alpha, we get:
alpha = (m_bucket + m_pulley) * g * r / ((1/2) * m_pulley * r^2)
m_bucket = 6.27 kg
Substituting the values, we get:
alpha = (6.27 + 4.31) * 9.8 * 0.294 / ((1/2) * 4.31 * 0.294^2)
alpha = 11.58 rad/s^2
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QUESTION 17
Which statement best describes the difference between strong nuclear forces and weak nuclear forces? (2 points)
O Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for
holding atoms' nucleus together.
O Weak nuclear forces hold bonds between atoms together. Strong nuclear forces hold together the nucleus of an
atom,
O Strong nuclear bonds prevent atoms from falling apart. Weak nuclear bonds prevent compounds from falling apart.
O Strong nuclear forces are involved in breaking electrons from their shells. Weak nuclear forces hold protons in the
nucleus.
Answer: Weak nuclear forces are involved when certain types of atoms break down. Strong nuclear forces are responsible for holding atoms' nucleus together.
What is a real life example of elastic potential energy?
A stretched rubber band is an example of elastic potential energy. When a rubber band is stretched, potential energy is stored in it, which may be released when the rubber.
band is allowed to return to its original shape. This potential energy is known as elastic potential energy because it is stored as a result of the tension in the rubber band. causing the rubber band to move. This shows how elastic potential energy may be converted into kinetic energy and how things can store energy in elastic connections .A stretched rubber band is an example of elastic potential energy. When a rubber band is stretched, potential energy is stored in it, which may be released when the rubber band is allowed to return to its original shape. This potential energy is known as elastic potential energy because it is stored as a result of the tension in the rubber band. The stored energy is turned into kinetic energy when the rubber band is released, causing the rubber band to move. This shows how elastic potential energy may be converted into kinetic energy and how things can store energy in elastic connections.
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An aluminum bar 600mm long, with diameter 40mm long has a hole drilled in the center of the bar.The hole is 30mm in diameter and is 100mm long. If modulus of elasticity for the aluminum is 85GN/m2.Calculate the total contraction on the bar due to a compressive load in 180KN
Answer:
Total contraction on the Bar = 1.22786 mm
Explanation:
Given that:
Total Length for aluminum bar = 600 mm
Diameter for aluminum bar = 40 mm
Hole diameter = 30 mm
Hole length = 100 mm
elasticity for the aluminum is 85GN/m² = 85 × 10³ N/mm²
compressive load P = 180 KN = 180 × 10³ N
Calculate the total contraction on the bar = ???
The relation used in calculating the contraction on the bar is:
\(\delta L = \dfrac{P *L }{A*E}\)
The relation used in calculating the total contraction on the bar can be expressed as :
Total contraction in the Bar = (contraction in part of bar without hole + contraction in part of bar with hole)
i.e
Total contraction on the Bar = \(\dfrac{P *L_1 }{A_1*E} + \dfrac{P *L_2 }{A_2 *E}\)
Let's find the area of cross section without the hole and with the hole
Area of cross section without the hole is :
Using A = πd²/4
A = π (40)²/4
A = 1256.64 mm²
Area of cross section with the hole is :
A = π (40²-30²)/4
A = 549.78 mm²
Total contraction on the Bar = \(\dfrac{P *L_1 }{A_1*E} + \dfrac{P *L_2 }{A_2 *E}\)
Total contraction on the Bar = \(\dfrac{180 *10^3 \N }{85*10^3 \ N/mm^2} [\dfrac{500}{1256.64}+ \dfrac{100}{549.78}]\)
Total contraction on the Bar = 2.117( 0.398 + 0.182)
Total contraction on the Bar = 2.117*(0.58)
Total contraction on the Bar = 1.22786 mm
Radiation present in the environment but not produced by humans is called ______.
Answer:
background
Explanation:
Does volume alone determine weather an object will float or sink? I believe its no. I just need to make sure.
Answer:
No
Explanation:
Density determines whether an object sinks or float. if the object is less dense than the medium in which it was submerged, it will float. for example, when you pour oil in water, it floats because water is denser than oil.