Numerade

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A small object is projected from level ground with an initial velocity of magnitude 18.0 m/s and directed at an angle of 60.0° above the horizontal. How does your result from part C compare to the maximum height $h_{max}$ reached by the object? $(y_{90.0\%} - y_0) / h_{max} = 0.360$ Part E For when the object has horizontal displacement $x - x_0 = \alpha R$, where $\alpha$ is a positive constant, derive an expression (in terms of $\alpha$) for $(y - y_0) / h_{max}$. Your result should not depend on the initial velocity or the angle of projection. Express your answer in terms of $\alpha$. $(y - y_0) / h_{max} = 4\alpha(1 - \alpha)$

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The following statement about Keynesianism is FALSE: ________. Modern governments need to intervene in order to ensure than employment remains at the highest-sustainable level Boosting employment levels and wages is the chief prerequisite for steady economic growth There is a greater need to invest in high-income, high-skilled jobs than in manual work Maximizing employment is the key to economic growth

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.External wealth can increase by all of the following, EXCEPT: borrowing from international entities. lending to international entities. increases in the value of international assets (capital gains). decreases in the value of liabilities to international entities.

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Starting from point E, which point represents the outcome of an increase in price, holding all else constant?

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Critics use the following argument to suggest that globalization is a contributing factor to an increase in pollution. ? a. people in developing countries are used to coping with more pollution ? b. globalization results in increased commerce between countries, which results in an increase in the amount of transportation activity (e.g. trains, barges, air cargo, trucks, etc.) ? c. globalization results in an increase in the amount of activity that takes place in companies that do not have adequate pollution controls ? d. globalization results in increased production, which has the undesirable side-effect of increased pollution ? e. firms that operate in countries that have adequate pollution regulations have a tendency to move their manufacturing operations to countries that have less stringent or no pollution controls to avoid the cost of regulation

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Use Matlab script that runs a Simulink to determine the distances y at any time with the following specifications: - Ask user to input the values for $p$, $p_0$, $g$, $h$, initial time $t_i$, final time $t_f$. - Call a simulink to calculate/simulate the needed results. - Plot $y$ vs. $t$ for [$t_i$<=$t$<=$t_f$]. - Plot the velocity $v$ vs. $t$ for [$t_i$<=$t$<=$t_f$] . - Show the value of angular frequency. $\omega = \sqrt{\frac{p_0g}{ph}}$. - Initial conditions are: t=0, y=-5 m and v=0. - Simulink uses a scope to show y and v in same figure. - Find and print the max distance reached in y direction and the max velocity.

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In 2015, a one cent stamp from 1793 sold at auction for $2,350,000. What was the rate of return on that stamp? A. 33.96% B. 9.07% C. 14.01% D. 1.25%

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If $f(x) = \frac{6x^2 + 3x + 6}{\sqrt{x}}$, then: f'(x) = f'(3) =

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A Scanning-tunneling microscopy (STM) is a type of microscope where a very sharp probe is placed near (but not touching) a conducting metal surface to be scanned (see Figure - right). Inside the probe and the conductor, electrons are forced to move about (=0), however, the vacuum between them acts as a quantum barrier (see Figure - left). An electric potential difference is set up between the probe and the conductor. If the gap is large, then this is just like an open circuit and no current will flow from the conductor to the probe. If, on the other hand, the gap is small enough, electrons can tunnel across the barrier creating a current flow. Therefore, as the probe is scanned across the conductor surface, the current will vary depending on the distance and so a map of the height of the surface may be obtained. When an electron in the conductor tunnels through the barrier to the probe, it is just the same physics as an electron tunneling out of (one side of) a finite box. Suppose an electron inside the conductor has an energy, E = 1.6 x 10^-20 J towards the barrier gap, and the gap is of width, d = 5.0 x 10^-10 m. You may assume this is a non-relativistic situation.

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Problem 2.10 The wave function (Equation 2.14) has got to be normalized; given that the $\psi_n$'s are orthonormal, what does this tell you about the coefficients $c_n$? Answer: $\sum_{n=1}^{\infty} |c_n|^2 = 1$. [2.34] (In particular, $|c_n|^2$ is always $\le$ 1.) Show that $(H) = \sum_{n=1}^{\infty} E_n |c_n|^2$. [2.35] Sec. 2.3: The Harmonic Oscillator 31 Incidentally, it follows that $(H)$ is constant in time, which is one manifestation of conservation of energy in quantum mechanics.

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jesus f.