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Martyn King

Martyn K.

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Viewed Questions

The belt passing over the pulley is subjected to forces $\mathbf{F}_{1}$ and $\mathbf{F}_{2}$, each having a magnitude of $40 \mathrm{N}$. $\mathbf{F}_{1}$ acts in the $-\mathbf{k}$ direction. Replace these forces by an equivalent force and couple moment at point $A$. Express the result in Cartesian vector form. Set $\theta=0^{\circ}$ so that $\mathbf{F}_{2}$ acts in the $-\mathbf{j}$ direction.

The belt passing over the pulley is subjected to forces $\mathbf{F}_{1}$ and $\mathbf{F}_{2}$, each having a magnitude of $40 \mathrm{N}$. $\mathbf{F}_{1}$ acts in the $-\mathbf{k}$ direction. Replace these forces by an equivalent force and couple moment at point $A$. Express the result in Cartesian vector form. Set $\theta=0^{\circ}$ so that $\mathbf{F}_{2}$ acts in the $-\mathbf{j}$ direction.

Engineering Mechanics: Statics and Dynamics

The phasor diagram for a particular RLC series circuit is shown in the figure. If the circuit has a resistance of $100 \Omega$ and is driven at a frequency of $60 \mathrm{Hz}$, find (a) the current amplitude, (b) the capacitance, and (c) the inductance.

The phasor diagram for a particular RLC series circuit is shown in the figure. If the circuit has a resistance of $100 \Omega$ and is driven at a frequency of $60 \mathrm{Hz}$, find (a) the current amplitude, (b) the capacitance, and (c) the inductance.

Physics

The manufacturer of Advil, a common headache remedy, recently developed a new formulation of the drug that is claimed to be more effective. To evaluate the new drug, a sample of 200 current users is asked to try it. After a one-month trial, 180 indicated the new drug was more effective in relieving a headache. At the same time a sample of 300 current Advil users is given the current drug but told it is the new formulation. From this group, 261 said it was an improvement. At the .05 significance level can we conclude that the new drug is more effective?

The manufacturer of Advil, a common headache remedy, recently developed a new formulation of the drug that is claimed to be more effective. To evaluate the new drug, a sample of 200 current users is asked to try it. After a one-month trial, 180 indicated the new drug was more effective in relieving a headache. At the same time a sample of 300 current Advil users is given the current drug but told it is the new formulation. From this group, 261 said it was an improvement. At the .05 significance level can we conclude that the new drug is more effective?

Basic Statistics for Business and Economics

A large stock of resistors is known to have 20 per cent defectives. If 5 resistors are drawn at random, determine: (a) the probabilities that (i) none is defective (ii) at least two are defective (b) the mean and standard deviation of the distribution of defects.

A large stock of resistors is known to have 20 per cent defectives. If 5 resistors are drawn at random, determine: (a) the probabilities that (i) none is defective (ii) at least two are defective (b) the mean and standard deviation of the distribution of defects.

Engineering Mathematics

Probability

Test exercise

Questions asked

ANSWERED

Kenny Mesadieu verified

Numerade educator

A 2-pole, single-phase alternator driven at 3000rpm require a mechanical input to its rotor of 30kW when it is delivering its full-load output of 30kW. Under this condition the fixed and variable losses are1100W and 2.8kW respectively, and the rotor field winding is supplied from a 110V dc source. Given that the full-load efficiency is 87%, determine. the frequency generated, the input driving torque on full-load and the rotor field current

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INSTANT ANSWER

II. A motor is also required for an industrial wood chipper.

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INSTANT ANSWER

A motor is required for an industrial wood chipper. From the ABB motors data sheet link attached select a suitable motor, giving the motor type number https://library.e.abb.com/public/7b37518ea1d0cb94c1257b130056f26d/General%20performance%20motors%20EN%2002_2010.pdf

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INSTANT ANSWER

Figure 3: Combinational logic circuit For the above combinational logic circuit you must analyse, optimise and enhance the operation by finding its Boolean algebra and Truth table then use them for a Karnaugh Map of the circuit. Compare and comment between the optimised circuit which you have got using the Karnaugh Map and the original circuit. Then afterwards, enhance the optimised circuits using only NAND gates only, for all above circuits.

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INSTANT ANSWER

Figure 5: 'JK' sequential logic circuit For the above 'JK' sequential logic circuit (Fig.5) you must analyze, optimize and enhance the operation by making use of Timing Diagrams for the circuit. Analyze the above circuit by explaining the truth/state table and using Timing Diagrams. For optimizing, you need to design a two-bit (0-3) binary counter using the above 'JK' sequential logic circuit (or a standard JK IC CHIP) and then explain the operation of the counter by showing its Timing Diagrams. For enhancing, you need to design four-bit (0-15) binary counter using above 'JK' sequential logic circuit and then explain the operation of counter by showing its Timing Diagram.

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ANSWERED

Supreeta N verified

Numerade educator

Network analysis of a circuit has provided the following result: i(t) = 1/(L?) e^(-?t) [3 cos ?t] dt Integrate the above to find the original expression for the network.

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ANSWERED

Supreeta N verified

Numerade educator

Scenario An RLC series circuit has a voltage of 10V, a resistance of R = 1k, L = 47mH, and C = 10?F If the circuit current is now given as i(t) = 1/(L?) * e^(-?t)[? cos ?t - ? sin ?t] dt And the constant values L, ? and ? are defined as ? = R/(2L) and ? = sqrt((R/2L)^2 - 1/LC) Find the accurate integral expression for i(t) and the value of current after 5mS

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AWAITING AN EDUCATOR

A series RLC circuit, having a resistance of 4 Ω and inductance of 0.5 H and capacitance ‘C’ in series, is connected across a 50 V, supply. Produces the resonant frequency of 50 kHz. Determine using AC circuit theory: · The capacitance to give resonance at the frequency stated. · The voltages across the inductance and the capacitance. · The Q factor for this circuit

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ANSWERED

Supreeta N verified

Numerade educator

A drugs company produced a new pain-relieving drug for migraine sufferers and its advertisements stated that the drug had a 90% success rate. A doctor doubted whether the drug would be as successful as the company claimed. She prescribed the drug for 15 of her patients. After six months, 11 of these patients said that their migraine symptoms had been relieved by the drug. 1. Test the drug company’s claim, at the 5% level of significance 2. Should the doctor continue to prescribe the drug?

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