Numerade

Questions asked

BEST MATCH

What is the purpose of including a negative and positive control? Positive control allows us to make sure the bacteria are capable of growing, negative control allows us to determine the background mutation rate of the bacteria Positive control allows us to determine the background mutation rate of the bacteria, negative control allows us to make sure the bacteria are capable of growing

View Answer

BEST MATCH

Question 20) Some of the important properties of ionic compounds are as follows: i. low electrical conductivity as solids and high conductivity in solution or when molten ii. relatively high melting and boiling points iii. Brittleness iv. solubility in polar solvents How does the concept of ionic bonding discussed in this chapter account for these properties?

View Answer

BEST MATCH

Solve the following system of equations by the substitution method: 1) 3x - 15y = 24 2) 5y + 8 = x

View Answer

BEST MATCH

Consider the network shown below. Ignoring reactive power flow through the transmission lines and assuming magnitude voltage as 1 pu, active power injection at bus-i can be approximately written as: $P_i = \sum_{k=1}^{n} \frac{1}{x_{ik}} (\delta_i - \delta_k)$ where, $x_{ik}$ is the reactance of line i-k. Find the voltage angle of bus 2 and bus 3 w.r.t. bus 1. Select one or more: A. Angle of Bus-2: 1.2274° B. Angle of Bus-3: -4.1862° C. Angle of Bus-3: 4.1862° D. Angle of Bus-3: -6.3025° E. Angle of Bus-2: 2.1468° F. Insufficient data to calculate G. None of these H. Angle of Bus-2: -1.2274° I. Angle of Bus-2: 1.7189°

View Answer

BEST MATCH

a) How many operating forces are necessary for successful operation of an indicating instrument? Explain the methods of providing these forces. b) A moving-coil instrument has the following data: number of turns = 100, width of coil = 20 mm, depth of coil = 30 mm, flux density in the gap = 0.1 Wb/m$^2$. Calculate the deflecting torque when carrying a current of 10 mA. Also calculate the deflection if the control spring constant is 2 \times 10$^{-6}$ N-m/degree.

View Answer

BEST MATCH

QUESTION 1 a. Explain why profit maximization requires that MC equals MR (3 points) b. Do you think abnormal profits are sustainable in the long run in a perfectly competitive market? Explain your answer (2 points) c. Explain how long run differs from the short run in perfectly competitive markets (2 points)

View Answer

BEST MATCH

A single-phase, controlled half-wave rectifier is fed by a 230 V, 50 Hz supply and delivers an average load current of 30 A at a delay angle, \alpha of 120° with an extinction angle, \phi of 30°. (a) Define briefly the term 'overlap angle' with reference to rectifier. [2 marks] (b) Draw the following waveforms on the single-phase timing diagram provided: (i) the firing pulse for the SCR, [1 mark] (ii) the load current waveform, [2 marks] (iii) the load voltage waveform.

View Answer

BEST MATCH

Marks 12 Q - 1 A. Electrical AC circuit is given in Fig. 1 a). Please derive the expression of the equivalent capacitance $C_{eq}$ of the circuit. B. Electrical AC circuit is given in Fig. 1 b). Please derive the expression of the equivalent inductance $L_{eq}$ of the circuit. Fig. 1 a) $C_1$ $C_2$ $C_3$ $C_4$ Fig. 1 b) $L_1$ $L_2$ $L_3$ $L_4$

View Answer

BEST MATCH

Which of the following fits the Disinterested Perspective of a moral principle? These are the options to select for the question. 1 Doing nothing when witnessing bullying of fellow employees 2 Advocating for the rights of indigenous people 3 Ruling against the availability of contraceptives 4 A coin flip

View Answer

BEST MATCH

What sort of factors did the students point to in their efforts to 'neutralize' the deviance and stigma associated with cheating? How do these change the context of the cheating? Are there people you would openly discuss cheating with but others you would not? What is different about these groups? Can you think of other actions or behaviors that are viewed differently depending on context? What is different about the social settings or contexts where a behavior is considered 'deviant' and 'not deviant'?

View Answer

raul m.