Numerade

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Two ice dancers are practicing a part of their routine, which calls for skating in a straight line on frictionless level ice. Dancer X, mass 35 kg, skating to the right at 10 m/s, collides with and embraces dancer Y, whose mass is 40 kg. The embracing couple moves to the right with a speed of 2 m/s after the collision. (a) Find the magnitude and direction of the velocity of dancer Y before the collision. (b) If their collision took 40 ms (0.04 s) to occur, what average force (magnitude and direction) was exerted on dancer X in this interval?

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2 A pair of points on the graph of an exponential function is given. Find a formula for the function. k(t): (0, 90), (5, 10) k(t) =

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In base python, Numbers, for the most part, appear as one of two types. What are these two types?

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5 Assessment For an economy to increase investment, it must Multiple Choice increase nominal GDP. buy more stocks and bonds. increase saving. increase present consumption.

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Consider a random variable x with density f(x) = ce^(-|x|) for x in (-infty, infty). c is a constant. What is the value of c? (Hint: to be a valid probability density, f must integrate to 1 over its domain.) Consider a random variable X with density f(x) = ce^(-|x|) for x in (-infty, infty). What is the value of c? Hint: To be a valid probability density, f must integrate to 1 over its domain.

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If $1100 is borrowed for 4 years wtih $2800 due at the end of the loan, find the annual simple interest rate r.

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a method to impact learning in the affective domain is role modeling true/false

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can you make revision notes on Beams and Beams using double integration and explain the formulas with some example questions

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Req 3 and 4: Determine the balance in retained earnings at January 1, 2023, as Fieri reported using the FIFO method and determine the adjustment of the balance in retained earnings as on January 1, 2023, using the average method instead of the FIFO method. Note: Enter your answers in millions (i.e., 10,000,000 should be entered as 10). Req 1 Req 2 Req 3 and 4: Prepare the journal entry at the beginning of 2024 to record the change in accounting principle. (Ignore income taxes.) Note: If no entry is required for a transaction/event, select "No journal entry required" in the first account field. Enter your answers in millions (i.e., 10,000,000 should be entered as 10).

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Q3(a) (i) State the physical meaning of the normalisation condition. (ii) Suppose an eigenfunction is given by, $\psi(x) = \begin{cases} A(a-x) & 0 < x < a \\ 0 & \text{otherwise} \end{cases}$ where A is real. Determine the value of A in terms of a. [8 Marks] [2] [6] Q3(b) [8 Marks] (i) The lifetime of an excited nucleus is typically of the order of $10^{-12}$ s. Calculate the uncertainty in the energy of the emitted $\gamma$ photon for the case where the nucleus decays to its ground state. [4] (ii) Use the uncertainty principle to estimate the speed of the electron in the ground state orbit of a hydrogen atom for which the radius is $5.0 \times 10^{-11}$m. [4] Q3(c) ANSWER PART (c) OR PART (d) [4 Marks] State what is meant by a shell and a subshell with respect to electron in atoms. The electronic configuration for carbon is written as $1s^22s^22p^2$ - explain what this means. Q 3(d) OR [4 Marks] Show that the Schrödinger equation is linear and state the physical meaning of this aspect of the Schrödinger equation.

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jesse t.