Engineering

A single link of a robot arm is shown in Figure P3.38. The arm mass is m and its center of mass is located a distance L from the joint, which is driven by a motor torque T, through two pairs of spur gears. We model the arm as a pendulum with a concentrated mass m. Thus, we take the arm's moment of inertia I to be zero. The gear ratios are N = 2 (the motor shaft has the greater speed) and N = 1.5 (the shaft connected to the link has the slower speed). Obtain the equation of motion in terms of the angle 0, with T, as the input. Neglect the shaft inertias relative to the other inertias. The given values for the motor and gear inertias are 1m = 0.05 kg-m IG, = 0.025 kg-m IG = 0.1 kg-m IG, = 0.025 kg-m IG. = 0.08 kg-m Tmf Im The values for the link are Gears Motor 10 IGA IG 1G g m = 10 kg Arm m L = 0.3 m
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Problem 2: A general plane wave propagating in the direction of the vector B is given by E (x, y, z, t) = E0ej (wt-B.r+)where Eo= Eoxax+Eoyay+EozazB=Bxax+Byay+Bzazandr=xax+yay+zaza) begin with the wave equation for a non-conductive material: 2 E a2E/at2= 0and show that the electric field given above is a solution to the wave equation if |B| = 2/b) Show using Gauss's Law that B.E=0, 1.e, that B and E are perpendicularc) Show using Faraday's Law that B x E wH i.e, that B,E and H a all mutually perpendicular Make sure in part (a) that you use the proper Laplacian for a vector expression.
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) Predict the clutch engagement time when thestarting speed is 20 m/s, the maximum drive torqueis 17 Nm, the system inertia is 0.006 kg m2, and theapplied force rate is 10 kN/s.y = 0.83 + 0.017(20) + 0.0895(17)+42.771(0.006) + 0.027(10) 0.0043(17)(10)= 0.827126
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For the accident of Gulf of Mexico Oil Spill, British Petroleum took the followingsteps to pay for the serious consequences (i=7% per quarter). Pay $3 billion at the end of the third quarterof 2010 and another $2 billion at the end of the fourth quarter of 2010. Make payments of $1.25 billioneach quarter thereafter until a total of $20 billion (the total $20 billion includes the payments in 2010).a) Develop a cash flow diagram.b) What is the equivalent present value at the beginning of the third quarter of 2010?c) What is the equivalent present value at the beginning of the first quarter of 2010?d) What is the equivalent future value at the end of 2013?
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Which kinds of cable consists of one or more twisted-pair wires bundled together?
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Which of the following is the proper incident response for end users?They should contact the incident response team and immediately back up all important files.They should contact the incident response team and continue working to avoid raising suspicion.They should step away from their computer systems and contact the incident response team.They should attempt to contain the incident and contact the incident response team.
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Which of the following options would be a filter to isolate a HTTP connection between a client with IP address 10.10.10.125 and a server with IP address 10.10.10.10 in a network trace?a) Destination Port = 80 and Source IP = 10.10.10.125b) Source Port = 80 and Destination IP = 10.10.10.125c) Destination Port = 80 and Source IP = 10.10.10.10d) Source Port = 80 and Destination IP = 10.10.10.10
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Problem 6. Bitcoin script. Alice is on a backpacking trip and is worried about her devices con- taining private keys getting stolen. She wants to store her bitcoins in such a way that they can be redeemed via knowledge of a password. Accordingly, she stores them in the following ScriptPubKey address:OP_SHA256 OP_EQUALa. Write a ScriptSig script that will successfully redeem this transaction given the password. Hint: it should only be one line long.b. Suppose Alice chooses an eight character password. Explain why her bitcoins can be stolen soon after her UTXOS are posted to the blockchain. You may assume that computing SHA256 of all eight character passwords can be done in reasonable time.c. Suppose Alice chooses a strong 20 character passphrase. Is the ScriptPubKey above a secure way to protect her bitcoins? Why or why not?Hint: reason through what happens when she tries to redeem her bitcoins.
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The following entity can be established by the JFC staff to ensure unity of effort between engineers, civil affairs, and the many other stakeholders involved in civil-military engineering projects. They are:
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A common task for system administrators is to configure critical services. This project requires that you work with a virtual installation of the latest version of Windows Server that will be promoted to a Domain Controller as well as configuring several aspects of DNS on that server. You will include a reflective paper (with a minimm of 1000 words in current APA format, including a minimum of 5 scholarly journal references with citations) that details the installations, configurations, challenges, and solutions to complete the following systems administration project: Install a virtual instance of the latest version of Windows Server inside your Cybrscore Lab shell. Configure the Server as a Domain Controller. Guiding steps for this can be found at Microsofts TechNet. Using PowerShell, add a Name Resolution Policy Table rule that configures the server at 10.1.0.1 as a DNS server for the namespace abcd.com. Guiding steps for this can be found via Microsoft Docs. Using PowerShell, retrieve the Name Resolution Policy Table rule that is configured on the server.The paper must utilize appendixes to reference screenshots along the way. Screenshots must identify a unique piece of information on the users computer such as a picture and include the system date and time in each screen capture. At the minimum, screenshots must exist during the initial setup of Virtualbox, installation of the operating system, configuration of the user accounts, security updates, and firewall configuration of the new operating systems. Subsequent screenshots must exist that detail the other deliverables in each phase (e.g., such as DNS)
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Language: C#Need help designing AND coding following problem using VISUAL STUDIO:Assuming that C is a Celsius temperature, the following formula converts the temperature to aFahrenheit temperature (F):F = (9/5)C + 32Create an application that displays a table of the Celsius temperatures 0-20 and their Fahrenheitequivalents. The application should use a loop to display the temperatures in a list box.Extra Credit: 5 pointsAllow the user to enter a starting Celsius temperature and then display the Celsius temperatures withtheir Fahrenheit equivalent for the next 20 values.
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_____ often offer Web server management and rent application software to businesses.
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when using the show ip protocols command, which of the following is not displayed?
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A two-pole AC motor operates on a three-phase. 60 Hz, 240 Vrms line-to-line supply. What is its synchronous speed? a.1000 rpm b.1800 rpm c.2400 rpm d.3600 rpm
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.It is desired to compress methane from 60 psia and 40F to 1000psia. Using the Methane P-H diagram determine the work per pound of gas required for a 100% efficient compression and final stage exit temperature using:a. A single stage compressorb. A two stage compressor with interstage cooling to 40Fc. A three stage compressor with interstage cooling to 70F.
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cite the phases that are present and the phase compositions for the following alloya. 15 wt% Sn-85 wt% Pb at 100 degree C (212 degree F) b. 25 wt% Pb-75 wt% Mg at 425 degree C (800 degree F) c. 85 wt% Ag-15 wt% Cu at 800 degree C (1470 degree F) d. 55 wt% Zn-5 wt% Cu at 600 degree C (1110 degree F) e. 1.25 kg Sn and 14 kg Pb at 200 degree C (390 degree F) f. 7.6 lbm Cu and 144.4 lbm Zn at 600 degree C (1110 degree F) g. 21.7 mol Mg and 35.4 mol Pb at 350 degree C (660 degree F) h. 4.2 mol Cu and 1.1 mol Ag at 900 degree C (1650 degree F)
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describe ltp and the roles of ampa and nmda receptors in ltp.
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a 553 f capacitor is discharged through a resistor, whereby its potential difference decreases from its initial value of 80.5 v to 10.7 v in 3.63 s. find the resistance of the resistor in kilohms.
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Which of the following uses packet switching? A) Dial-up telephone circuits. B) Leased line circuits. C) Both A and B D) Neither A nor B and more
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Given a 10 bit address physical and 3 bit index for the cache.A CPU produces the following sequence of read addresses in hexadecimal:20, 04, 28, 60, 20, 04, 28, 4C, 10, 6C, 70, 10, 60, 70Supposing that the cache is empty to begin with, and assuming an LRU replacement, determine whether each address produces a hit or a miss for each of the following caches:(a) Direct mapped(b) Fully associative, and(c) Two-way set associative
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6) Which one of the following is TRUE of ac circuits with reactive elements?A) Depending on the frequency applied, the circuit can either be inductive or capacitive. B) The smaller the resistive element of a circuit, the closer the power factor is to unity.C) The magnitude of the voltage across any one element can never exceed the applied voltage. D) The impedance of any one element can never exceed the total network impedance.
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An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100C. Air enters the heating section at 10C and 70 percent relative humidity at a rate of 35 m/min, and it leaves the humidifying section at 20C and 60 percent relative humidity. Determine:(a) the temperature and relative humidity of air when it leaves the heating section,(b) the rate of heat transfer in the heating section, and(c) the rate at which water is added to the air in the humidifying section.
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true or false? the internet protocol (ip) address of designates the machine you are on, regardless of that machine's assigned ip address.
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"The power dissipated by the individual resistors, added together, is equal to the power dissipated by the equivalent resistance." This is true in which cases? a. neither for series nor for parallel resistors.b. for all series and parallel resistor combinations c. when the resistors are in series d. when the resistors are in parallel
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