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Two insulators are initially electrically neutral. After being rubbed together while surrounded by dry air, one of them has a charge of +10 nC. What is the charge of the other? Multiple choice question. +10 nC Zero -10 nC

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Question 7 5 pts A steel ball is attached to a string and is swung in a circular path in a horizontal plane as illustrated in the accompanying figure. At the point P indicated in the figure, the string suddenly breaks near the ball. If these events are observed from directly above as in the figure, which path would the ball most closely follow after the string breaks? OB OA OC OD OE (A) (B) (C) P (D) (E)

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QUESTION 2 a) An investor has an investment fund of Kes. $ 3 M $. She intends to apportion these funds into 2 securities $ X $ and $ Y $ as follows; Kes. 1.9M in security $ X $ and Kes. 1.1M in security Y . The return on each security is dependent on the state of economy as shown below: \begin{tabular}{|c|c|c|c|} \hline State of economy & \multicolumn{2}{|l|}{Probability Return X} & Return Y \\ \hline Boom & 0.2 & $ 15 \% $ & 20\% \\ \hline Normal & 0.5 & $ 12 \% $ & 18\% \\ \hline Depressed & - & 8\% & 25\% \\ \hline \end{tabular} Required: a) Expected return on portfolio

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a) Calculate the cell constant. b) Calculate the molar conductivity of the AgNO3 solution.

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A hominin is defined as having two characteristic features: Group of answer choices speech and tool use bipedal locomotion and non-honing chewing complex bipedal locomotion and speech non-honing chewing complex and tool use

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Texts: andv2 Let {x_k} be a solution of the difference equation x = Ax*x. a. Compute x_0. [Hint: You do not need to know A itself.] b. Find a formula for x_k involving k and the eigenvectors v and v_2. a. x_0 = [Type an integer or simplified fraction for each matrix element] b. x_k = v * v_2^k (Type expressions using k as the variable.) 4

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The scatterplot below shows the relationship between poverty rate, y, in the 51 states in the US (including DC) and the high school graduation rate, x. The linear regression equation for predicting poverty is as follows: y = 64.68 - 0.62x The actual high school graduation rate for a certain state is 78.3%, and the actual poverty rate in that state is 17.234%. What is the residual for this observation? (a) Residual = (b) Interpret the meaning of the residual. At a high school graduate rate of 78.3%, the poverty rate was 1.1% in reality. At a high school graduation rate of 78.3%, the model predicted a poverty rate of 1.1%. At a high school graduation rate of 78.3%, the model predicted a poverty rate of that was 1.1 percentage points different than what was observed in reality.

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P 5.34 A voltage $v_c(t) = 10\cos(2000\pi t)$ is applied to a $10^{-4}F$ capacitance. $v_c(t) (V)$ Part H State the phase relationship between the current and voltage. Express your answer to two significant figures and include the appropriate units. $i_c(t)$ leads $v_c(t)$ by = Value Units

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2. Casein has an excess of amino acids with acidic R-groups like aspartic acid. Complete the reactions below for aspartic acid. H\nHO\nOH excess acetic acid b) H\nN\nOH excess NaOH HO\nOH c) \nH\nN\nOH OH pH 7.4 d) Explain why the casein precipitates when we add excess acetic acid. 6. Which of the following changes when a catalyst is added to a reaction? EA ?H reaction rate

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A light diffraction occurs when waves impinge on an obstacle and the waves bend behind it. Consider two lightbulbs located near to each other. There is no interference pattern can be observed on a distant screen. Explain why does this happen? Justify your answer. (4 marks)

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