Deformation or fracture failures refer to the inability of a material to withstand applied stress and maintain its original shape or structure, leading to permanent deformation or complete breakage of the material.
Four Examples of Deformation/Fracture Failures:Case 1: The collapse of the I-35W Bridge in Minneapolis, Minnesota, in 2007—this falls under the category of brittle fracture as the bridge experienced a sudden and catastrophic failure without significant deformation beforehand. The cause of the failure was found to be due to design and construction errors that led to corrosion and fatigue in the steel components.
Case 2: The failure of the Deepwater Horizon oil rig in the Gulf of Mexico in 2010—this falls under the category of ductile fracture as the failure occurred due to the slow accumulation of damage from exposure to harsh conditions and corrosion. The investigation into the disaster found that the well casing had failed due to a combination of factors, including poor design, weak manufacturing, and a lack of proper maintenance.
Case 3: The failure of the Fu.kus.hima Daiichi nuclear power plant in Japan in 2011—this falls under the category of brittle fracture as the failure was due to a massive earthquake that caused the plant to lose power and the cooling systems to fail, leading to a catastrophic release of radioactive materials.
Case 4: The collapse of the Silver Bridge in Point Pleasant, West Virginia, in 1967. This falls under the category of fatigue fracture as the failure was caused by repeated load cycles over time that caused stress cracking in the eye bar components of the bridge.
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Describe an experiment to determine the frequency, amplitude and period of a flywheel in motion.
Answer:
To determine the moment of inertia of a flywheel we will have to consider a few important factors. First, we have to set up a flywheel along with apparatus like a weight hanger, slotted weights, metre scale and we can even keep a stopwatch.
Then we make some assumptions.
We will take the mass as (m) for the weight hanger as well as the hanging ring. The height will be (h). Now we consider an instance where the mass will descend to a new height.
The graph shows how the force component F cos θ along the displacement varies with the magnitude s of the displacement. Find the work done by the force. The graph plots F cosine of theta versus s. At s equals zero the graph is at zero and then rises linearly to the value 62 newtons. It then descends linearly to zero forming a shaded triangle of base 1.6 meters.
The work done by the force is 49.6 J.
The complete question is in the attachment. The formula to calculate work done
W = F × d × cos α
F = force (Newton) d = displacement (m) α = the angle between the force and the displacementWhen the condition
Forces that work in an object F = F cos θThe area under the curve in the force against displacement graph shows the work done.
W = Area of triangle
W = (b × h) ÷ 2
W = (b × h) ÷ 2
W = (62.0 × 1.60) ÷ 2
W = 99.2 ÷ 2
W = 49.6 Joule
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a roller coaster cart starts from rest and accelerates, due to gravity, down a track. the cart starts at a height that enables it to complete a loop in the track the magnitude of the centripetal force keeping the cart in circular motion would be greatest at point
A roller coaster cart starts from rest and accelerates, due to gravity, down a track. the cart starts at a height that enables it to complete a loop in the track the magnitude of the centripetal force keeping the cart in circular motion would be greatest at point
The magnitude of the centripetal force keeping a roller coaster cart in circular motion is given by the equation F = mv^2/r, where m is the mass of the cart, v is its velocity, and r is the radius of the circle it is moving in. At the point where the magnitude of the centripetal force is greatest, the velocity of the cart is highest and the radius of the circle is smallest. This point is typically at the bottom of the loop, where the track is closest to the ground and the velocity is greatest. Hence, the magnitude of the centripetal force keeping the roller coaster cart in circular motion would be greatest at the bottom of the loop.
What the Meanning of Circular Motion?Circular motion is a movement of an object along the circumference of a circleor rotation along a circular path. It can be uniform, with constant angular rate of rotation and constant speed, or non-uniform with a changing rate of rotation.
Examples of circular motion include: an artificial satellite orbiting the Earth at a constant height, a ceiling fan's blades rotating around a hub, a stone which is tied to a rope and is being swung in circles, a car turning through a curve in a race track, an electron moving perpendicular to a uniform magnetic field, and a gear turning inside a mechanism.
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Lasers can be used to drill or cut material. One such laser generates a series of high-intensity pulses rather than a continuous beam of light. Each pulse contains 540 mJ of energy and lasts 12 ns . The laser fires 10 such pulses per second.
One atmosphere of pressure is defined as 101.325 kPa. From the answer as below, select the closest approximation to the mass of air above a square meter of the earth
Answer:
The answer is 8.73 kPa.
Hope this helped you. Tell me if I am wrong.
I also answered first. Please brainliest if any chance!
Explanation:
2 In an oscillation experiment with the spiral spring, the time taken for 30 oscillations with
different masses were measured and the result tabulated below.
M (g)
100
200
300
400
500
600
e (cm)
4.10
8.10
12.00
16.00
20.10
24.00
t(s)
13.40
18.30
21.50
25.00
27.50
30.00
T(S)
T² (5²)
(a) Using two separate graph sheets, plot graphs of M against e and M against 7²
(b) Determine the slopes of the two graphs and their standard errors.
(c) Given that M=ke and T = 2,
M+mo, where k is the spring's force constant and mo is a
kg
constant, deduce the value of k and g from your graphs and give their S.I. units
According to Hooke's Law, the force given to a spring causes it to stretch directly in proportion.
Using a spiral spring, how do you determine the acceleration brought on by gravity?There is a restoring force Mg=xng when a mass, M, coupled to the spring extends it by a distance, x. Here, n=extensionload (n is the slope of the first graph you will construct), and g=gravitational acceleration The spring's effective mass, m, can be found by looking at the T2 vs. load graph's x-intercept.According to Hooke's Law, the force given to a spring causes it to stretch directly in proportion. (Engineers assert that stress and strain are inversely related.) F represents the force, x is the stretch, and k is a proportionality constant. These three terms are represented by the symbols F = kx.The complete question is,
What was the experiment's finding about spiral springs?
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The site now places a weigin of 0.39 N on top of the block of wood. She then starts to pour ell into the measuring cylinder. The rule balances again when there is 60 cm3 of oil in the measuring cylinder. The gravitational field strength g is 10 N/kg.
(a) Calculate (i) the weight of the oil in the cylinder,
(ii) the mass of the oil in the cylinder.
Fig. 5.1 (b) Calculate the density of the oil.
(a)
(i) The weight of the oil in the cylinder can be calculated using the formula: weight = force = mass * gravitational field strength.
Given that the gravitational field strength is 10 N/kg, and the volume of oil is 60cm^3 we can find the mass of oil by using the formula of density=mass/volume
density=mass/volume
mass=densityvolume
mass=100060
mass=60000g
so the weight of the oil in the cylinder is:
weight = mass * gravitational field strength
weight = 60000g * 10 N/kg
weight = 600000 N
(ii) The mass of the oil in the cylinder can be calculated using the formula: mass = weight / gravitational field strength
mass = 600000 N / 10 N/kg
mass = 60000g
(b) The density of the oil can be calculated using the formula: density = mass/volumemass / volume
density = 60000g / (60 cm^3)
density = 1000 kg/m^3
So, the density of the oil is 1000 kg/m^3.
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You twirl a over your head at a tangential speed of 3.80 per secondWhat is the contripetal acceleration of the lasso's from your hand m / (s ^ 2)
The centripetal acceleration of the lasso's from your hand is determined as 5.78 m/s².
What is the centripetal acceleration?The centripetal acceleration of the lasso's from your hand is calculated by applying the following formula as shown below.
a = ( v² ) / ( r )
where;
v is the tangential speed r is the radius of the circular path.a = ( 3.8 m/s )² / ( 2.5 m )
a = 5.78 m/s²
Thus, the centripetal acceleration of the lasso's from your hand is a function of the tangential speed and the radius of the circular path.
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The complete question is below:
You twirl a over your head at a tangential speed of 3.80 per secondWhat is the contripetal acceleration of the lasso's from your hand m / (s ^ 2), if the radius of the circular path is 2.5 m?
label each marked position of mars with the phrase that most accurately describes its apparent motion in our sky against the background stars. A - Retrograde
B - Prograde - moving faster
C - Prograde - moving slower
The phrase that most accurately describes its apparent motion in our sky against the background stars is west then Prograde - moving slower then Retrograde then Prograde - moving faster and at last east.
The apparent motion of a planet or other object as seen from Earth against a background of stars, moving from west to east (looking or viewing to the south - apparent right to left) which is called Prograde motion.
Retrograde motion is defined as "the apparent motion of a planet or other object as seen from Earth against the background of stars, moving from east to west (looking/viewing to the south - apparent left to right) motion."
When a superior planet (Mars, Jupiter, Saturn, Uranus, etc.) orbits the Sun at a distance greater than that of the Earth and is passed by the latter, which is moving with a higher relative velocity, the 'Superior' planet's normal direct motion appears to stop and then temporarily turn retrograde, giving it the appearance of undergoing a loop or zigzag in the sky.
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A 0.300−kg puck, initially at rest on a horizontal, frictionless surface, is struck, is struck by a 0.200−kg puck moving initially along the x axis with a speed of 2.00 m/s. After the collision, the 0.200−kg puck has a speed of 1.00 m/s at an angle of θ=53.0o to the positive x axis (see Figure 9.11).
Find the fraction of kinetic energy transferred away or transformed to other forms of energy in the collision.
97.5% of the initial kinetic energy was transferred away or transformed to other forms of energy in the collision.
The fraction of kinetic energy lost in a collision is equal to 1 minus the fraction of initial kinetic energy that remains after the collision. To calculate this, we need to find the initial and final kinetic energies of the system.
Initial kinetic energy:
KE_i = 0.5 * (0.300 kg + 0.200 kg) * (2.00 m/s)^2 = 0.5 * 0.500 kg * 4.00 m^2/s^2 = 4.00 J
Final kinetic energy:
KE_f = 0.5 * (0.300 kg) * (0.0 m/s)^2 + 0.5 * (0.200 kg) * (1.00 m/s)^2 = 0.5 * 0.200 kg * 1.00 m^2/s^2 = 0.10 J
Fraction of kinetic energy lost:
(KE_i - KE_f) / KE_i = (4.00 J - 0.10 J) / 4.00 J = 0.975 or 97.5%
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While in Earth’s orbit, an 80-kg astronaut carrying a 20-kgtool kit is initially drifting toward a stationary (to her) spaceshuttle at a speed of 2 m/s. What is her final speed if shethrows the tool kit toward the shuttle with a speed of 6 m/s asseen from the shuttle.
Please show a correct solution to this problem so that I canrate you a lifesaver.
The final speed of the astronaut in this scenario will be 1 m/s toward the shuttle.
This can be calculated by using the conservation of momentum - the momentum of the astronaut plus the momentum of the tool kit before the throw must equal the momentum of the astronaut plus the tool kit after the throw.
Momentum before the throw = (80 kg)(2 m/s) + (20 kg)(0 m/s) = (160 kg m/s) Momentum after the throw = (80 kg)(v) + (20 kg)(6 m/s)
Solving for v gives us v = 1 m/s. Therefore, the astronaut's final speed is 1 m/s toward the shuttle.
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Specify all quantum numbers for the electrons in the 3p state in Zr. Do the same for the 4p state in Ba.
The 3p subshell is filled for titanium atoms and Each electron has n = 3 and l = 1. The [tex]m{eq}_l {/eq}[/tex] values range from -1 to +1. The [tex]m{eq}_s {/eq}[/tex] values are either +1/2 or -1/2.
What is quantum numbers?The path and motion of an electron in an atom can be described using quantum numbers. The Schrodinger equation must hold true for the total quantum numbers of all the electrons in a particular atom.
Quantum numbers are the set of digits used to express the location and energy of an electron in an atom. There are four quantum numbers: the principal, azimuthal, magnetic, and spin quantum numbers.
Quantum numbers specify the values of a quantum system's conserved quantities. A group of numerical values that offer solutions to the Schrodinger wave equation for hydrogen atoms are known as electronic quantum numbers (the quantum numbers describing electrons).
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Each of the following statements is related to conductors in electrostatic equilibrium. Choose the words that make each statement correct. (i) The net charge is always zero [(a) inside; (b) on] the surface of an isolated conductor, (ii) The electric field is always zero [(c) inside; (d) just outside] a perfect conductor, (iii) The charge density on the surface of an isolated, charged conductor is highest where the surface is [(e) sharpest; (f) smoothest].
(i) The net charge is always zero (a) inside a conductor in electrostatic equilibrium.
(ii) The electric field is always zero (c) inside a perfect conductor in electrostatic equilibrium.
(iii) The charge density on the surface of an isolated, charged conductor is highest where the surface is (e) sharpest.
Charged conductors create the state of electrostatic equilibrium, when the surplus charge has properly repositioned itself to lower the overall strength of the repelling forces.
Charges in a conductor react swiftly to attain a constant state known as electrostatic equilibrium when an excess of charge is applied to the conductor or the conductor is placed in a static electric field.
The following formula, ϕ = ∮ E ⋅ d A \phi = \oint {E \cdot dA} ϕ=∮E⋅dA, which is the integral of the dot product of the electric field (E) and the area of the conductor (A), states that electrostatic equilibrium will be reached in the presence of the magnetic field where the surface is perpendicular.
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a subway train starts from rest at a station and accelerates at a rate of 1.60m/s21.60m/s2 for 14.0 ss . it runs at constant speed for 70.0 ss and slows down at a rate of 3.50m/s23.50m/s2 until it stops at the next station. Find the total distance covered.
The total distance covered by the subway train until is start from rest and again comes to rest is 435.36m.
The subway train starts from rest, and it accelerates to 1.6m/s² for 14s and after running for constant speed for about 70s and then it slows down at a rate of 3.5 m/s².
Now, while accelerating,
S = Ut + 1/2at²
U is initial speed, a is acceleration and t is time.
Putting values,
S = 1/2 x 1.6 x 14
S = 11.2m
Now,
V² - U² = 2aS
V is the constant speed,
V = √(2 x 1.6 x 11.2)
V = 5.98 m/s.
Distance covered with constant speed = 5.98 x 70
Distance S' covered with constant speed = 419.06 m.
Now, while the train slow down,
2a'S'' = V² - (0)²
a' = 3.5 m/s²
S'' = 5.10m
So, the total distance covered by the train will be (5.10 + 419.06 +11.2)m
The total distance covered by the train is 435.36 m.
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On the Earth, you can see the ground in someone’s shadow; on the moon, you can’t—the shadow is deep black. Explain the difference.
Therefore, the moon itself casts shadows on the moon when sunlight hits its surface and is reflected, appearing as moonlight from Earth.
Why is the moon's surface in shadow? The so-called Rayleigh dispersion effect is one of the scientific features that can distinguish between the Earth and the moon.This idea is known as the dispersion of electromagnetic radiation, including visible light, by particles whose size is significantly smaller than the wavelength of the photons being scattered.Even our "shadows" can be seen clearly because to our atmosphere.The shadows on the moon appear darker when there is no atmosphere present or any other mechanism that allows sunlight to be absorbed or refracted away from the area in its shadows. Therefore, the moon itself casts shadows on the moon when sunlight hits its surface and is reflected, appearing as moonlight from Earth.To learn more about moon's surface refer
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hearing rattles from a snake, you make two rapid displacements of magnitude 1.8 m and 2.4 m . choose the sketch (drawn roughly to scale) that shows how your two displacements might add up to give a resultant of magnitude: 4.2 m 0.60 m 3.0 m drag the appropriate labels to their respective targets. not all labels will be used.
The displacement must be in same, opposite and perpendicular directions to get the net displacements as 4.2 m, 0.6 m and 3.0 m.
The two displacements are, 1.8 m and 2.4 m.
Since 1.8 m + 2.4 m = 4.2 m.
The displacements must be aligned in the same direction.
For the second case, where net displacement should be 0.6 m.
Since 2.4 m - 1.8 m = 0.6 m,
In this case the displacements must be in opposite directions.
For net displacement 3.0 m, the two displacements must be perpendicular to each other since,
[tex]\sqrt{{1.8}^2+{2.4}^2} = 3.0[/tex]
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Pressure Problems The pictured U-tube is with the mercury open to the atmosphere at both ends. Assume that the mystery fluid does not mix with the Mercury (a) Let po represent atmospheric pressure, phg represent the density of mercury, and pi represent the density of the mystery fluid. Obtain an algebraic expression for the density of the mystery fluid in terms of some or all of the following: hi, ha, hs, and pe (b) For the situation shown in the figure, which is true, pr Phe Or Prhe Explain. If hi- 2.55 cm and h2 25.00 cm (clearly the figure is not to scale), then what is the most likely identity of the mystery fluid? On what scientific evidence did you base your choice? (c) Page 11 of 276 (d) If the absolute pressure at Point A is 114,200 Pa, what is the height hs? Use the nume from Part (c). Using previous numerical values, determine the gauge pressure at Point A. Take atmospheric pressure to be po 101,300 Pa. (e)
(a) The density of the mystery fluid, ρi, is given by the equation ρi = (h2 - h1) * ρHg. (b) In this situation, pρHg > pρi is true. This is because the density of mercury is greater than the density of the mystery fluid, so the pressure of the mercury is greater. The most likely identity of the mystery fluid is air, as this is the most common fluid found in the atmosphere. (c) The absolute pressure at Point A is calculated using the equation po + pρHg * h2 + pρi * hi. (d) Using the numerical values given, the height hs is calculated to be 2.55 cm. The gauge pressure at Point A can then be calculated to be 114,200 Pa - 101,300 Pa = 12,900 Pa. (e)
1- Find one number to represent each car’s speeding up (acceleration). Do not change units in this activity!
Each car drips oil once every second (think sugar packets).
The speedometer measures the speed of the car when the oil drips.
Larger numbers should be cars that speed up faster
2- Some cars have the same number of acceleration as another one. Which are they?
The cars that have the same number of acceleration as another one are C and E.
What are the cars with the same acceleration?
The cars with the same acceleration must have equal change in speed with direction.
The resultant velocity of the cars or the resultant speed of the cars in a given direction is calculated as follows;
change in speed of car A = 45 mph - 5 mph = 40 mph
change in speed of car B = 15 mph - 0 mph = 15 mph
change in speed of car C = 50 mph - 5 mph = 45 mph
change in speed of car D = 34 mph - 4 mph = 30 mph
change in speed of car E = 57 mph - 12 mph = 45 mph
Thus, the two cars that are changing their speed in a particular direction at equal rates are C and E.
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The constellation whose stars are used as pointers to the north celestial pole in the northern hemisphere at this time in history is:______
The constellation whose stars are used as pointers to the north celestial pole in the Northern Hemisphere at this time in history is Ursa Minor.
Polaris is known as the North Star, which is located in the constellation Ursa Minor. The star doesn't sit directly on the Earth’s north celestial pole, but it is very close. Using the Little Dipper as a reference, Polaris is easy to identify in the Northern Hemisphere. The stars, including the constellations, in the night sky appear to rotate around Polaris throughout the year.
Ursa Minor (or the Little Bear) is a constellation that is located in the far northern sky. This constellation was one of the 48 constellations that was listed by Ptolemy, and it remains one of the 88 modern constellations. Traditionally, Ursa Minor has been important for navigation because of Polaris being the north pole star.
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Does a communications or weather satellite that is orbiting Earth follow Kepler's laws? Kepler's Laws of Motion These laws are true for any orbit: a planet orbiting a star, a moon orbiting a planet, or an artificial satellite orbiting the Earth.
Yes, a communication or weather satellite that is orbiting Earth follows Kepler's laws. Kepler's laws describe the motion of objects in orbit around a central body, such as a planet or a star.
These laws are based on the principles of gravity and the conservation of energy, and they describe the elliptical shape of an object's orbit, the relationship between the size of the orbit and the time it takes to complete one revolution, and the relationship between an object's distance from the central body and its orbital velocity.
Since a communication or weather satellite orbiting the Earth is subject to the laws of gravity, it follows Kepler's laws, just like any other object in orbit around a central body. This means that its orbit is elliptical, its orbital velocity changes based on its distance from the Earth, and it follows the other principles described by Kepler's laws.
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An object is thrown straight down with an initial speed of 4 m/s from a window which is 8 m above the ground. The time it takes the object to reach the ground is:
A. 0.80 s
B. 0.93 s
C. 1.3s
D. 1.7s
E. 2.0s
The time it takes an object to fall to the ground can be calculated using:
t = √(2 * d / g)
t = √(2 * 8 / 9.8) = √(16 / 9.8) = √(1.6326530612244898) = 1.27
So, the nearest answer to the value is C, which is 1.3s.
What is gravitaional force?Gravitational force of attraction between any two masses in the universe. It was first described by Newton in his law of universal gravitation, which states that every particle in the universe attracts every other particle with a force proportional to the product of their masses.
How can one calculate gravitational force?You can calculate gravitational force by:
F = G * (m1 * m2) / r^2, where F is the force of gravity, G is the gravitational constant (6.67 x 10^-11 Nm^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between them.
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two coherent sources of light of equal strength produce near parallel beams that intersect at a point p. compared to the intensity from just one of the sources, the intensity of the light due to both sources at point p will be select all that apply 1. four times that of a single source. 2. not enough information given. 3. twice that of a single source. 4. in a range from zero to four times that of a single source. 5. in a range from zero to two times that of a single source. I thought the intensity will be twice that of a single point due to the superposition principle. But, apparently I am wrong.
The intensity of the light due to both sources at point P will be four times that of a single source.
According to the superposition principle, the total intensity of light at a point is equal to the sum of the intensities due to each individual source. Since the two sources are of equal strength, the intensity of the combined light at point P will be twice that of a single source.
However, the light from each source will interfere with each other, resulting in constructive and destructive interference. As two beams are coherent, meaning they have the same frequency and phase, the light waves will add together constructively at certain points, increasing the intensity. So, at point P, the intensity of the light due to both sources will be four times that of a single source.
Hence option 1 is correct.
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What is the magnitude and direction of the electric field intensity when the distance of a point charge from the center of a dipole is very large as compared to the length of the dipole?
To calculate electric field created by a dipole on the axial line, magnitude and direction of the electric field intensity when the distance of a point charge from the center .
All the measurement of distances are to be taken from the centre(O).
Let the distance between O to +q and O to –q be ‘l’. So, total length between +q and –q will be ‘2l’.
Take a point ‘p’ on the axial line at the distance ‘r’ from the center as shown in figure.
Electric field on the axial line of dipole is not 0
magnitude =E = 14πε0 2Pr2
An electric field is the physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them.
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For a wire extended elastically, the elastic energy per unit volume X is given by
X=Ce^2E
where C is a constant,
e is the strain of the wire,
and E is the Young modulus of the wire.
Show that C has no units.
C's units must be dimensionless in order for the equation's units to be consistent, C doesn't have any.
What is elastic energy?When a force is applied to an object, it deforms, storing energy that is released when the force is removed. This energy is known as elastic energy. The inclination of the thing to assume its original shape results in this energy.
This is the case because C's units cancel out with the other variables' units in the equation.
The fractional change in the wire's length is represented by the strain, or e, which has no dimensions. The units of the Young modulus, E, are Newtons per square metre. The units of force and area cancel out when we square the strain and multiply it by the Young modulus, leaving only units of energy per unit volume.
For the units to cancel out appropriately in the equation X=Ce2E, the units of energy per unit volume are commonly written as joules per cubic metre (J/m3). Therefore, C, as a proportionality constant, must have no units.
Therefore, C has no units since C's units must be dimensionless for the equation to have consistent units.
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How do I solve this 625=1/2(8)(x)^2 ?
The value X is equal to 1/100 or -1/100
How to solve rational equations?
Any equation with at least one rational expression is referred to as a rational equation. The same operations are applied to both sides of the equation to solve rational equations in the same way that algebraic equations are, until the variable is isolated on one side of the equals sign.Rational Equation Solver. A rational equation is a particular kind of equation that contains at least one rational expression, which is just another way of saying a fraction.The ideal method for solving this kind of equation is to use the LCD principle to get rid of all the denominators (least common denominator).625 = 1/2(8)(x)^2
simplifying the equation,
625= 1/16x^2
multiply both sides by x^2
625x^2=(1/16x^2)x^2
simplify equation
625x^2=1/16
solve 625x^2=1/16, we get
x=1/100 or x=-1/100
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Give the SI base unit of each of these quantities. Enter the abbreviation rather than the name of the unit. a. Massb. lengthc. timed. temperature a. kgb. mc. sd. K
Measurements in seconds, kilograms, meters, and kelvins are all SI units.
The fundamental unit of time has an acronym, what is it?SI time is represented by the sign for a second, or s. The unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, which has a fixed numerical value of 9 192 631 770 when stated in the unit Hz, or s-1, is known as the caesium frequency, or vCs.The kilogram is the SI unit for mass (kg). A body's weight in a given reference frame is described in science and technology as the force that causes it to accelerate at a rate equal to the local acceleration of free fall in that frame.Measurements in seconds, kilograms, meters, and kelvins are all SI units.To learn more about fundamental unit refer to:
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the response to a question has three alternatives: a, b, and c. a sample of 120 responses provides 60 a, 12 b, and 48 c. show the frequency and relative frequency distributions. class frequency relative frequency a b c total
The total frequency is 120 1.
The frequency of each response category is the number of times it occurs in the sample. The relative frequency of each response category is the fraction of the total responses that belong to each category.
Class Frequency Relative Frequency
a 60 60/120 = 1/2
b 12 12/120 = 1/10
c 48 48/120 = 2/5
Total 120 1
Therefore, the frequency and relative frequency distributions of the responses are:
Class Frequency Relative Frequency
a 60 1/2
b 12 1/10
c 48 2/5
Total 120 1
Frequency refers to the number of times a particular event or item occurs in a set of data. It is a measure of how often an event or item appears in a data set. In statistical analysis, frequency is used to describe the distribution of a set of data, such as the number of occurrences of a particular value, category, or event. Frequency can be expressed as an absolute number or as a proportion or percentage of the total number of events or items in the data set. Frequency is an important concept in statistics and data analysis, as it provides a way to summarize and describe the patterns and relationships within a data set.
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A stone of mass 4.0kg is pulled along a horizontal path by a rope which makes an angle of 30 with the horizontal. Neglecting friction, calculate the tension in the rope if the body accelerates uniformly at 2m/s2
Answer:
9.24 N
Explanation:
The force accelerating the 4 kg body is the horizontal force = T cos 30
F= ma so:
T cos 30 = 4 kg ( 2 m/s^2)
T = 8 / cos (30) = 9.24 N
Suppose Gabor, a scuba diver, is at a depth of 15m
. Assume that:
The air pressure in his air tract is the same as the net water pressure at this depth. This prevents water from coming in through his nose.
The temperature of the air is constant (body temperature).
The air acts as an ideal gas.
Salt water has an average density of around 1.03 g/cm3
, which translates to an increase in pressure of 1.00 atm
for every 10.0 m
of depth below the surface. Therefore, for example, at 10.0 m
, the net pressure is 2.00 atm
.
What is the ratio of the molar concentration of gases in Gabor's lungs at the depth of 15 meters to that at the surface?
The molar concentration refers to nV
, i.e., the number of moles per unit volume. So you are asked to calculate (n/V)15m(n/V)surface
What type of expansion does the air in the "freediver's" (no gear) lungs undergo as the diver ascends?
the ratio of the molar concentration of gasses in Gabor's lungs to that at the surface is 3.00 : 1.00 atm and the type of expansion, isothermal expansion.
What is the molar concentration?At a depth of 15 meters, the net pressure is 3.00 atm (1.00 atm for every 10.0 m of depth below the surface). Since the air pressure in Gabor's air tract is the same as the net water pressure at this depth, the pressure of air in his lungs is 3.00 atm.
The molar concentration of a gas is proportional to its pressure and inversely proportional to its temperature and volume. Since the temperature is constant, the ratio of the molar concentration of gases in Gabor's lungs at the depth of 15 meters to that at the surface is given by:
(n/V)15m/(n/V)surface = (P15m/Psurface) = (3.00 atm/1.00 atm) = 3.00atm.
As the diver ascends, the air pressure in his lungs decreases, causing the air to expand. This is an example of an isothermal expansion.
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(psychology question)
What is decay?
Decay is the quantity that can be stored.
Decay is a measure of time.
Decay is a measure of the quality of memories.
Decay is to diminish or break down.
Answer:
Decay is a measure of the quality of memories.
Explanation:
That is just a definition of decay theory for Psychology
Answer:
Decay is to diminish or break down.
Explanation:
took test
