Problem 2. 2 .The particle P moves along the curved slot, a portion of which is shown. Its distance in meters measured along the slot is given by s = t^2/ where t is in seconds. The particle is at A when t = 2.00s and at B when t = 2.20s. Determine the magnitude a_avg of the average acceleration of P between A and B. Also express the acceleration as a vector a_avg using unit vectors i and j.
Answers
Magnitude of average acceleration [tex]a_{avg}[/tex]=2.75 units
Average acceleration [tex]a_{avg}=[/tex] [tex]2.265 i- 1.58j[/tex]
We're given that [tex]s=\frac{t^2}{4}[/tex]
And partice is at A at t=2 s and at B at t= 2.2s
Instantaneous velocity [tex]\frac{ds}{dt} =\frac{t}{2}[/tex]
Velocity at A ([tex]V_{a}[/tex]) at 2s = [tex]\frac{t}{2}[/tex] or [tex]\frac{t}{2}Cos \frac{\pi}{3} i+ \frac{t}{2}Sin \frac{\pi}{3}j=\frac{i+\sqrt{3} j}{2}[/tex]
Velocity at B ([tex]V_{b}[/tex]) at 2.2s =[tex]\frac{t}{2}[/tex] or [tex]\frac{t}{2}Cos \frac{\pi}{6} i+ \frac{t}{2}Sin \frac{\pi}{6}j=\frac{\sqrt{3}i+j }{2}[/tex]
Average acceleration = [tex]\frac{V_{b}-V{a}}{t}[/tex] =[tex]2.265 i- 1.58j[/tex]
magnitude = [tex]\sqrt{(2.265)^2- (1.58)^2}[/tex] = [tex]2.75[/tex]
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Related Questions
Where can you go to find the system requirements?
A. Instructor Contact Center
B. Library
C. Help Center
D. None of these.
Answers
Then you go to find the system requirements are the D. None of these as none of it dictates about the find the system requirements hen needed.
What is person requirement and device requirement?User necessities describe what the person ought to do . System necessities describe how will the person acquire person necessities while interacting with the device plus nonpurposeful necessities such as "the device ought to cope with one hundred thousand customers on the identical time". So: User requirement : The person ought to see their check results.Where is device necessities.
For packaged products, device necessities are regularly imprinted on the packaging. For downloadable products, the device necessities are regularly indicated at the download page. System necessities may be widely categorized as purposeful necessities, records necessities, pleasant necessities and constraints.
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The complete stress distribution obtained by superposing the stresses produced by an axial force and a bending moment is correctly represented by _______.
Answers
The complete stress distribution obtained by superposing the stresses produced by an axial force and a bending moment is correctly represented by F/A - (My)/(Iz).
What is the distribution of pressure at some stage in bending?Compressive and tensile forces expand withinside the path of the beam axis beneath neath bending loads. These forces set off stresses at the beam. The most compressive pressure is observed on the uppermost fringe of the beam whilst the most tensile pressure is positioned on the decrease fringe of the beam.
The bending pressure is computed for the rail through the equation Sb = Mc/I, wherein Sb is the bending pressure in kilos in keeping with rectangular inch, M is the most bending second in pound-inches, I is the instant of inertia of the rail in (inches)4, and c is the space in inches from the bottom of rail to its impartial axis.
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Cisco what three best practices can help defend against social engineering attacks?
Answers
The three best practices that can help defend against social engineering attacks are:
Do not provide password resets in a c.ha.t window. Resist the urge to click on enticing web links. Educate employees regarding policies.What is Social Engineering?This refers to the art of manipulation of people through social interactions with the aim of getting access to sensitive information that gives unauthorized access.
Hence, we can see that some of the best practices that can be used to defend against social engineering include not clicking on suspicious links, educating people about the dangers, etc.
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20. A spur gear pinion and gear shown on a drawing have a diametral pitch of 12. The pitch radius of the pinion is 1.500 inches and the gear ratio is
specified to be 1:3. On the print, you would expect the pitch diameter of the gear to be
OA. 9.00 inches.
Answers
On the print you would expect the pitch diameter of the gear to be 9.00 inches. Option A is right.
How to solve for the diameterGear ratio = 1/3
This is solved as number of teeth on pinion / teeth on gear
= Np/Ng
The pitch diameter = 1.5 x 2
= 3
Diametral pitch = 12
NP = 3 x 12 = 36
This is the teeth on piston
Ng = 3NP
Ng = 3 * 36
= 108
Hence pitch diameter = 108/12 = 9
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Technician A says electrical circuit resistance causes voltage drop. Technician B says high-resistance problems cause an increase in current flow. Who is correct
Answers
The person that is correct is Technician A as electrical circuit resistance causes voltage drop.
What is a circuit?It should be noted that an electric circuit is the path through which electric changes flow in order to conduct current.
In this case, the person that is correct is Technician A as electrical circuit resistance causes voltage drop.
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A transformer has 300,000 windings in its primary coil and uses 12,000V AC input. (4 points) How many windings would be needed to produce at output of 110V AC
Answers
Answer:
2750
Explanation:
The number of windings and the voltage are proportional.
__
Let n represent the number of windings to produce 110 Vac. Then the proportion is ...
n/110 = 300,000/12,000
n = 110(300/12) = 2750 . . . . multiply by 110
2750 windings would be needed to produce 110 Vac at the output.
1.Which thematic group uses technology to direct the behavior of dynamical systems, ensuring that they behave in a predictable manner?
2.Which thematic group creates circuits with miniature, packaged components that directs and control electricity?
a.Communication Systems
b.Control Systems
c.Computer Systems
d.Energy Systems
e.Electronic Systems
Answers
Control systems govern the behavior of dynamic systems, while electronic systems are the ones that package the tiny components needed to conduct electricity. Thus, option E is correct.
What exactly are thematic groups?Thematic groups are made up of individuals who focus on the same theme or idea. Thematic teams working on various initiatives and concepts are made up of individuals with experience in various systems.
The function of the control system has been to regulate dynamic systems in order to bring about the desired result.The function of the electronic system thematic group is to package electronic miniatures in systems that play the job of directing electricity. Thus, option E is correct.Learn more about thematic group, here:
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A cantilever beam AB of length L has fixed support at A and spring support at B.
The spring behaves in a linearly elastic manner with stiffness k. If a concentrated
load P is applied at B, use any type of method to find:
(i) the force in the spring
Fb
,
(ii) the downward displacement
B
of end B. (15%)
Answers
The force in the spring will be [tex]F =\dfrac{KPl^3}{3EI}[/tex].
The deflection of the beam will be [tex]\rho[/tex] = [tex]0.15(\dfrac{KPL^3}{3EI})[/tex]
What is a cantilever beam?A rigid, horizontally extending structural member known as a cantilever is supported at only one end. Typically, it extends from a solidly affixed flat vertical surface, such as a wall.
Given that:-
A cantilever beam AB of length L has fixed support at A and spring support at B.The spring behaves in a linearly elastic manner with stiffness k. If a concentrated load P is applied at B.The spring force will be calculated as:-
[tex]F = kx[/tex]
Deflection will be given by:-
[tex]x = \dfrac{PL^3}{3EI}[/tex]
The spring force will be calculated by:-
[tex]F = \dfrac{KPL^3}{3EI}[/tex]
The deflection of the beam will be given as:-
[tex]\rho = \dfrac{0.15KPL^3}{3EI}[/tex]
Therefore the force in the spring will be [tex]F =\dfrac{KPl^3}{3EI}[/tex]..The deflection of the beam will be [tex]\rho[/tex] = [tex]0.15(\dfrac{KPL^3}{3EI})[/tex]
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____ grinders are used to grind diameters, shoulders, and faces much like the lathe is used for turning, facing, and boring operations.
Answers
Answer:
Cylindrical
Explanation:
A cylindrical grinder is a tool for shaping the exterior of an item. Although cylindrical grinders may produce a wide range of forms, the item must have a central axis of rotation. Shapes such as cylinders, ellipses, cams, and crankshafts are examples of this. Cylindrical grinding machines are specialized grinding machines that are used to process cylinders, rods, and similar workpieces. The cylinders revolve in one direction between two centers, while the grinding wheel or wheels are close together and rotate in the other direction.
Determine the minimum number of 120-volt, 20-ampere circuit breakers for a continuous load consisting of 63 feet of track lighting to be installed in a dress shop. Calculate the number of circuits to the larger whole number.
Answers
If we have 20-ampere circuit breakers. The number of circuits to the larger whole number is: 13.
Number of circuitsReceptacles on a single strap= 180 VA each.
Hence,
VA of the circuit=(Volts x Amperes)/One receptacle
Let plug in the formula
VA of the circuit=(120 volts x 20 amperes)/180 VA
VA of the circuit= 2,400 VA (circuit)/180 VA
VA of the circuit = 13 circuits
Therefore the number of circuits to the larger whole number is: 13.
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Technician A states; that bent lift arms can be straightened.
Technician B states; that worn lift pads should be replaced.
Who is correct?
Both technician "A" and "B"
Neither technician "A" nor "B"
Technician "A" only
Technician "B" only
Answers
What line separates two lanes traveling in the same direction
Answers
Answer:
White lane lines separate lanes of traffic moving in the same direction. (UK)
If a material is found to be in the tertiary phase of creep, the following procedure should be implemented:
a.The component should undergo dye penetrant process and condition monitored.
b.The crack should be stopped, drilled and condition monitoring should be applied.
c.The component should be replaced immediately.
d.None of the above.
Answers
When a material is found to be in the tertiary phase of creep, the following procedure should be implemented that is the component should be replaced immediately. Therefore, Option C is correct.
What do you mean by a tertiary degree of creep?Tertiary Creep has an extended creep rate and terminates when the material breaks or ruptures. It is related to each necking and formation of grain boundary voids. The wide variety of possible stress-temperature- time combos is infinite.
Therefore, When a material is found to be in the tertiary phase of creep, the following procedure should be implemented that is the component should be replaced immediately. Option C is correct.
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what documentation is required when a pilot has performed preventive maintenance on an aircraft?
Answers
The documents that is required when a pilot performs preventive maintenance is that
The above functions need to be carried out by the holder of at least one Part 61 Private Pilot Certificate and the person need to have been a registered owner (or co-owner) of the aircraft.
What is the preventive maintenance about?Note that in the above case, an Authorization to carry out preventive maintenance and also authorization to restart is needed.
If a preventive maintenance is to be performed on an aircraft, the paperwork needs:
The signaturecertificate numberThe kind of certificate held by the individual that is approving the work, A description of the work that needs to be entered in the aircraft maintenance records.Learn more about preventive maintenance from
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(a)Identify the relevant population for the below foci, and suggest the appropriate sampling
design to investigate the issues, explaining why they aare appropriate. Wherever necessary
identify the sampling frame as well.
A public relations research department wants to investigate the initial reactions of heavy soft-
drink users to a new all-natural soft drink
Answers
The relevant population for the below foci example is a small population and:
When a firm wants to investigate the first response of heavy fruit drink uses to a new all natural fruit drink and the best sampling to use random sampling.What is Simple random sampling?This is known to be a kind of probability sampling where the researcher randomly takes a subset of participants from a given population.
Note that the member of the population has an equal chance of being selected and as such, in the case above, The relevant population for the below foci example is small population and:
A firm wants to investigate the first response of heavy fruit drink uses to a new all natural fruit drink and the best sampling to use random sampling.Learn more about population from
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In third ange projection draw the plain view, front view and end view.
Answers
Answer:
The front view, is a drawing of the block, as if you are looking directly at the front of the object. The side view, is a drawing of the block, when it has been rotated so that one of its sides is now directly in view. The plan view, is a 'birds eye' view, from above.
What are the minimum and maximum required footing projections for a concrete footing having a thickness of 8 inches
Answers
The minimum and maximum required footing projections for a concrete footing having a thickness of 8 inches will be 4 inches and 8 inches.
What is projection?It should be noted that footing projections are important for construction purposes
In this case, the minimum and maximum required footing projections for a concrete footing having a thickness of 8 inches will be 4 inches and 8 inches.
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An injector pressure drop test to see if the injector is restricted with deposits can be done using an?
Answers
An injector pressure drop test to see if the injector is restricted with deposits can be done using an integer test.
What is injector strain drop?Fuel injectors have a glide charge. This glide charge of the injector is rated at a sure strain drop throughout the injector. Meaning the injector glide is say 30#/hr at 42.five PSI. This approach that that injector will glide 30#/hr so long as the strain on the deliver side, minus the strain withinside the manifold is 42.five psiListening or Clicking Test.
Start the engine and permit it to idle. Keep the engine strolling and contact the give-up of a protracted steel screwdriver towards the gas injector. Put your ear on the alternative give up of the screwdriver. A clicking sound approaches the injector's working.
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A composite wall is composed of two layers, each with constant properties. the thermal conductivity of layer 1 is twice that of layer 2. for steady-state conduction with no thermal generation, the correct temperature distribution is:
Answers
Given the indices stated above, the correct temperature distribution is: k1 = 2k2. See the definition of temperature distribution below.
What is temperature distribution?The Solution to the linear heat flow equation is what is known as thermal distribution.
It measures heat transfer with respect to normal or natural phenomena such as:
Irradiationconduction; andconvection.Learn more about temperature distribution at:
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Getting the bottom of your feet burned when walking on hot sand is due to what form of energy transmission? group of answer choices
Answers
Getting the bottom of your feet burned when walking on hot sand is due to a form of energy transmission known as conduction.
The types of energy transmission.In Science, there are three (3) main types of energy transmission and these include the following:
ConvectionRadiationConductionIn this scenario, we can infer and logically conclude that burning the bottom of your feet when walking on hot sand is primarily due to a form of energy transmission known as conduction because it involves the transfer of thermal energy (heat) due to the movement of particles.
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When reassembling a locking hub mechanism, it is a good idea to replace the: Group of answer choices retaining plate. all snap rings. bearing seal. axle shafts.
Answers
When reassembling a locking hub mechanism, it is a good idea to replace the bearing seal.
What is a bearing seal?It should be noted that the bearing seal is used to prevent contaminants from reaching the inside of the parts and also from preventing the lubricant leaking.
In this case, when reassembling a locking hub mechanism, it is a good idea to replace the bearing seal.
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You will get 50 points after giving proper answer
Answers
Answer:
i don't know
please mark me brainlist
The selective thickness shims are measured with a(n): Group of answer choices hydraulic press. outside micrometer. dial indicator. depth micrometer.
Answers
The selective thickness shims are measured with an outside micrometer.
What is a micrometer?It should be noted that a micrometer simply means an instrument for making precise linear measurement of dimensions.
In this case, the selective thickness shims are measured with an outside micrometer.
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the hazards associated with performing hot work include
Answers
Answer:
space look at tge explanation
Explanation:
Discuss some of the hazards associated with hot work in confined spaces. Provide specific examples or personal experiences in your response.
The hazards associated with performing hot work include:
HeatUVSparksFumesWhat are the Common Hazards of Hot Work?Note that when working with anything that cause spark or fire, the common hazard are:
Flying sparks. A Flammable swarfExplosive atmospheres, etc.Therefore, The hazards associated with performing hot work include:
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Nonshielded cable with a 1.5-inch diameter should have a minimum bending radius of
A. 1.5 in.
B. 12.0 in.
C. 3.0 in
D. 18.0 in.
Answers
Answer:
c is the answer because we have to double the number
A non-shielded cable should have a 3.0 in minimum bending radius and a 1.5 in maximum diameter. As a result, choice (C) is the right response.
What are shielded and unshielded cable?Based on their architecture, these cables are typically divided into two classes: shielded cables and unshielded cables.
Shielded twisted pair (STP) cable is another name for shielded cables. It has distinct wire pairs that are foil-wrapped. To offer double protection, these pairs are wrapped one more time. The shielding aids in preventing EMI and other technical problems that can jeopardize the signal integrity.
Unshielded cable, also known as unshielded twisted pair cable (UTP), is a type of cable in which the individual wire pairs are simply wrapped in foil without any additional layers of protection. Office settings with low traffic are best suited for unshielded wires.
Hence option (C) is accurate.
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They build bridges, buildings, dams, tunnels, tanks, power plants, transmission line towers and space satellites Group of answer choices Structural Engineer Satellite Engineer Water resource Engineer Construction Engineer
Answers
A Structural Engineer build bridges, buildings, dams, tunnels, tanks, power plants, transmission line towers and space satellites.
Who is a Structural Engineer ?A Structural Engineer can be defined as a professional who has been trained and licensed to analyze, plan and build different structures such as:
BridgesBuildingsDamsTunnelsThis ultimately implies that, the building of bridges, buildings, dams, tunnels, tanks, power plants, transmission line towers and space satellites are done by Structural Engineers.
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10. What refrigerant is no longer manufactured in the
United States?
Answers
Answer:
Freon Refrigerant
Explanation:
As of January 1, 2020 Freon Refrigerant can no longer be manufactured or imported to the United States. This is because R-22 (the principal component in Freon) has been banned in the states. Along with other greenhouse gasses, due to their contribution to damaging Earth’s ozone layer and global warming.
hope this helps:)
Answer:
Freon Refrigerant Is Now Banned in the US
As of January 1, 2020, a once very popular air conditioning refrigerant can no longer be made in or imported into the United States.
Please give me brainliest - you get 25% as well! I swear!
Preferential stress will cause crystals to rotate into a preferred orientation unless the crystals are ________
Answers
Answer:
Preferential stress will cause crystals to rotate into a preferred orientation unless the crystals are Equant
what is automechanic
Answers
Answer:
An auto mechanic is a mechanic who services automobiles, sometimes specializing in one or more automobile brands or sometimes working with any brand. In repairing cars, their main role is to diagnose the problem accurately and quickly.
A ball is thrown vertically up with a velocity of 80 ft/sec at the edge of a 200-ft cliff. Calculate the height h to which the ball rises and the total time t after release for the ball to reach the bottom of the cliff. Neglect air resistance and take the downward acceleration to be 32.2 ft/sec.
Answers
Answer:
y = ut + [tex]\frac{1}{2}[/tex][tex]at^{2}[/tex] , y = 80t - [tex]\frac{1}{2}[/tex][tex]32.2t^{2}[/tex]
for y = -200 ft,
-200 = 80t - [tex]16.1t^{2}[/tex] or [tex]16.1t^{2}[/tex] - 80t - 200 = 0
t = 80 ± [tex]\frac{\sqrt{80^{2} + 4(16.1)(200) }}{2(16.1)}[/tex] = 6.80 sec. ( or - 1.83 s)
For y = 0, [tex]u^{2}[/tex] = [tex]u_{o}^{2}[/tex] + 2ay, y = h = [tex]\frac{0-80^{2} }{-2(32.2)}[/tex]
= 99.4 ft.
Explanation:
Hope this helped, please message me if I made a mistake!
-Matt
