Questions asked
2. A Simply Supported "2x8" wooden beam (E = 1,000,000 psi) 10'-0" long is uniformly loaded ($\omega$ = 1 lb./in.). Find: a. Maximum bending stress (10 pts.) b. Maximum shear stress (10 pts.) c. Maximum deflection (10 pts.)
Show how you would make the following compound from the starting materials below. (20 points) Retrosynthesis arrows Br H-C$\equiv$C-H Starting materials Product
1. A fly starts at \( \overrightarrow{r_{o}}=(2.00 \mathrm{~m}) \hat{\imath}+(3.00 \mathrm{~m}) \hat{\jmath}+(4.00 \mathrm{~m}) \hat{k} \) and moves according to \[ \vec{v}(t)=\left[\left(1.85 \frac{\mathrm{m}}{\mathrm{s}}\right)+\left(1.15 \frac{\mathrm{m}}{\mathrm{s}^{2}}\right) t\right] \hat{\imath}-\left(2.10 \frac{\mathrm{m}}{\mathrm{s}}\right) \hat{\jmath}+\left[\left(4.80 \frac{\mathrm{m}}{\mathrm{s}}\right)-\left(0.815 \frac{\mathrm{m}}{\mathrm{s}^{3}}\right) t^{2}\right] \hat{k} \] a. What are the position, velocity, and acceleration of the fly at \( t=2.50 \mathrm{~s} \) ? b. What is the average velocity of the fly for the first \( 2.50 s \) ? c. What is the average acceleration of the fly from \( t=1.50 \mathrm{~s} \) to \( t=3.50 \mathrm{~s} \) ?
Joshua is attracted toward earth by a 500 in gravitational force there is attracted towards Josh with a force of
Some of the main props used in the 1980s television show The Dukes of Hazzard were 1969 Dodge Chargers . Producers purchased and wrecked many of these cars during the course of filming. You would expect that the supply curve for 1969 Dodge Chargers would be: Group of answer choices somewhat elastic. somewhat inelastic. perfectly elastic. perfectly inelastic.
A pendulum's angular position is given by $\theta = 0.0290 \cos(\omega t)$, where $\theta$ is in radians and $\omega = 3.78$ rad/s. Find the period (in s) and length (in m) of the pendulum.
F.) We showed in class (Lect. 8) that the average energy of a solid (approximated as a collection of N 3-D oscillators) is given by U = 3N <E> = 3N? / (e^(?/kT) - 1) where ? is the energy spacing of the oscillators. Plotted versus T, this looks like: U T Given that the heat capacity is defined as c = dU/dT, sketch the heat capacity of a typical solid: c T
Select the assumptions needed to show the Weighted Least Squares estimator consistent. ? A1 ? A2 ? A3 ? A3a ? A4 ? A5 ? $E \left( x_i \epsilon_i / \sigma_i^2 \right) = 0$
Download Coronavirus (COVID-19) Cases from Our World in Data site. Then transfer the csv file to your R workspace. Then run R codes for the following: 1. Plot a line graph for total covid cases for each of the Southern African countries from period between April 2020 - April 2022 and report on the following: a) countries with the highest and lowest cases for each covid waves shown. b) Which period would you call the most infectious period for Southern Africa based on your plots? 2. Extract the Botswana new covid cases and new deaths data for the year 2021 And answer the following: a) What the deadliest covid month in Botswana in 2021? b) Using an appropriate statistical method evaluate if there is correlation between infectivity and death? c) Does the number of new deaths affect by number of new cases? d) Based on the death patterns argue on whether the measures implemented by the government including lockdowns were helpful?
Bea is on a weekend fishing trip with her family. So far, she caught 4 mudfish, 10 catfish, and 13 tilapia. what is the probability that the next fish that bea catches will be a catfish a.37% b.48% c.15% d.38%
