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5 Some desert beetles can live without ever drinking liquid water. They survive on "metabolic water," which 0/0.87 points awarded Scored Multiple Choice is water formed during glycolysis. is water absorbed directly from the atmosphere. is water that was stored in the beetle's tissue during its larval stage. is water obtained from eating other organisms. is water formed during the electron transport chain.
In peas, tall (T) is dominant to short (t), red flowers (R) is dominant to white flowers (r), and wide leaves (W) is dominant to narrow leaves (w). A tall, red, wide-leaved plant is crossed to a short, white, narrow-leaved plant
1. Find the Thevenin equivalent of the circuit below: 2 5V $\frac{V_{ab}}{4}$ ↑ 3 a b 25 Points
3. 10 Find $I_o$ in the circuit of Fig. 3.59. $I_o$ 8$\Omega$ Figure 3.59 For Prob. 3.10. 1$\Omega$ 4 A $2I_o$ 2 $\Omega$ 4 $\Omega$
The MOST effective stimulant of the respiratory centers, resulting in hyperventilation is a(n):a. increase in blood COz.b. increase in blood pH.c. decrease in blood temperature.d. increase in hematocrit.e. increase in blood
There is also a positive, pleasant side of stress caused by good occurrences. Select one: O True O False
Which of the following is the most common text editor in Linux? Question 1 options: nano emacs gedit vi
A radioactive material decays according to the function Upper A left parenthesis t right parenthesis equals Upper A 0 e Superscript negative 0.0244 t, where Upper A 0 is the initial amount present and A is the amount present at time t (in years). Assume that a scientist has a sample of 500 grams of the radioactive matc) How much radioactive material is left after 10 years?erial.
COURSE TITLE: EL. ECT. ENGINEERING SCIENCE I, LEVEL: ND 1 (EEE) QUESTION I a) i. What is electrical power? [2 marks] . ii. List the three effects of an electric current [ 3 marks] . b) Electrical equipment in an office takes a current of \( 13 \mathrm{~A} \) from a \( 240 \mathrm{~V} \) supply. Estimate the cost per week of electricity if the equipment is used for 30 hours each week and \( 1 \mathrm{kWh} \) of energy costs N12.5. [10 marks] ii. Explain the term temperature coefficient. [5 marks] 2 QUESTION 2 a) The resistance of a coil of nickel wire at \( 20^{\circ} \mathrm{C} \) is \( 100 \Omega \). The temperature of the wire is increased and the resistance rises to \( 130 \Omega \). If the temperature coefficient of resistance of nickel is \( 0.006 /{ }^{\circ} \mathrm{C} \) at \( 20^{\circ} \mathrm{C} \), determine the temperature to which the coil has risen. [10 marks] b) i. List the four factors that determine the resistance of an electrical conductor[4 marks] ii. A copper cable is \( 1.2 \mathrm{~km} \) long and has a cross-sectional area of \( 5 \mathrm{~mm}^{2} \). Find its resistance at \( 80^{\circ} \mathrm{C} \) if at \( 20^{\circ} \mathrm{C} \) the resistivity of copper is \( 0.02 \times 10^{-6} \Omega \mathrm{m} \) and its temperature coefficient of resistance is \( 0.004 /{ }^{\circ} \mathrm{C} \). [ 6 marks] QUESTION 3 a) The resistance of a coil of aluminum wire at \( 18^{\circ} \mathrm{C} \) is \( 200 \Omega \). The temperature of the wire is increased and the resistance rises to \( 240 \Omega \). If the temperature coefficient of resistance of aluminum is \( 0.0039 /{ }^{\circ} \mathrm{C} \) at \( 18{ }^{\circ} \mathrm{C} \) determine the temperature to which the coil has risen. [12 marks] b) An aluminum cable has a resistance of \( 27 \Omega \) at a temperature of \( 35^{\circ} \mathrm{C} \). Determine its resistance at \( 0{ }^{\circ} \mathrm{C} \). Take the temperature coefficient of resistance at \( 0{ }^{\circ} \mathrm{C} \) to be \( 0.0038 /{ }^{\circ} \mathrm{C} \). [8 marks] QUESTION 4 a) For the circuit shown in Fig. 1 calculate (i) the value of resistor Rx such that the total power dissipated in the circuit is \( 2.5 \mathrm{~kW} \), (ii) the current flowing in each of the four resistors. [15 marks] b) Explain the term the capacitance of a capacitor. [5 marks]
Refer the figure to the right and carry out the following vector operation Write the vector \overrightarrow{OF} as a sum of scalar multiples of u and v