Numerade

Questions asked

BEST MATCH

An enzyme works rapidly on a substrate even a very low substrate concentrations. Explain why the KM is either large or small.

View Answer

BEST MATCH

A spur gear reducer has an 18-tooth pinion driven by an electric motor and a 36-tooth gear that drives a load involving "moderate shock". The pinion is designed to transmit 2 hp at 1120 rpm uniformly. The mountings and bearing clearances are such that Km = 1.8 and gear and pinion temperatures will remain below 160 °F. It is proposed that standard 20° full-depth gears be used, with both pinion and gear teeth being cut with a hobbing process with shaping cutters, from steel of 240 Bhn for the gear and 260 Bhn for the pinion. Diametral pitch is to be 10 and face width 1.0 in. The desired reliability with respect to bending fatigue failure is 99.99%. Estimate the safety factory for both pinion and gear with respect to bending fatigue failure. 1120 rpm Pinion: 260 Bhn + Gear: 240 Bhn + Np = 18 Ng = 36 P = 10 b = 1.0 in Φ = 20°

View Answer

BEST MATCH

Which structure represents the male gametophyte of a conifer? sperm pollen grain tree pollen cone

View Answer

BEST MATCH

Exercise 9 - Market-Share and Market-Size Variances: Al- Raffedeen Company produces mobile phone covers. The budgeted and actual data for September, 2018 follows: Units sold Sales revenues Variable cost ratio Market size in units Actual results 230,550 units ID 3,412,140 68% 4,350,000 units Static budget 220,000 units ID 3,300,000 64% 4,400,000 units Required: Compute the sales volume, the market-share and the market- size variances.

View Answer

BEST MATCH

Which transition element is a crucial component of vitamin B-12? Select one: a. Fe b. Co c. Ni d. Cu

View Answer

BEST MATCH

Question 1. Based on a study of a sample of 68 AUS students, we found the following facts on their studying time. \begin{tabular}{|l|l|l|l|} \hline & Size & Mean & Standard Deviation \\ \hline Male & 35 & 8.7 & 5.75 \\ Female & 33 & 11.71 & 8.10 \\ \hline \end{tabular} a) Test if the average studying time for all male students at AUS is higher than female students at $\alpha = 0.03$. (Use both critical value method and $p$-value method) (6pts)

View Answer

BEST MATCH

6. A line charge with linear charge density \lambda is placed parallel to, and a distance R away from, the axis of a conducting cylinder of radius b held at a fixed voltage such that the potential vanishes at infinity. Find (i) the magnitude and position of the image charge(s); (ii) the potential at any point (expressed in polar coordinates with the origin at the axis of the cylinder and the direction from the origin to the line charge as the x-axis); (iii) the induced surface charge density; (iv) the force on the charge.

View Answer

BEST MATCH

9.14 Express the sum of the following sinusoidal signals in the form of $A \cos(\omega t + \theta)$ with $A > 0$ and $0 < \theta < 360^{\circ}$. (a) $8 \cos(5t - 30^{\circ}) + 6 \cos 5t$ (b) $20 \cos(120\pi t + 45^{\circ}) - 30 \sin(120\pi t + 20^{\circ})$ (c) $4 \sin 8t + 3 \sin(8t - 10^{\circ})$

View Answer

BEST MATCH

(1 point) If you make quarterly deposits of $395.00 into an ordinary annuity earning an annual interest rate of 4.87%, how much will be in the account after 10 years? How much interest did you earn in those 10 years? How much is in the account after 10 years? $ How much interest was earned after 10 years? $

View Answer

BEST MATCH

1) Which of the following is an example of passive immunity? Maternal antibodies Hepatitis B vaccine Skin barrier Contracting measles

View Answer

deborah w.