Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
danielle griffith

danielle g.

Divider

Questions asked

BEST MATCH

Question 7 The following system has infinitely many solutions. $6x + 2y = 7$ $y = 2 - 3x$ True False

View Answer
 divider
BEST MATCH

For each statement below, indicate whether it applies to SO (slow oxidative fibers), FO (fast oxidative fibers), or FG (fast glycolytic fibers): Group of answer choices Slow speed of contraction, fatigue resistant [ Choose ] Used for intense short term movements [ Choose ] Large diameter fibers [ Choose ] An example might be erector spinae group (deep back muscles that maintain posture) [ Choose ] Adapted for aerobic respiration, intermediate diameter fibers [ Choose ] Poorly vascularized, few mitochondria [ Choose ]

View Answer
 divider
BEST MATCH

is completed? 5.35 The length of time X to complete a certain key task in house construction is exponentially distributed random variable with a mean of 10 hours. The cost C of completing this task is related to square of the time to completion by the formula $C = 100 + 40X + 3X^2$ a Find the expected value and variance of C. b Would you expect C to exceed 2,000 very often?

View Answer
 divider
BEST MATCH

The equation represents a line which is perpendicular to the line 4x - 3y = 3?

View Answer
 divider
BEST MATCH

The atomic masses of the elements listed on the Periodic Table are often not whole numbers. Why not? The masses on the chart are a weighted average mass of the isotopes. Each isotope of an element can have a different number of electrons, and this affects the atom's mass. Each isotope of an element can have a different number of protons, and this affects the atom's mass. None of the above.

View Answer
 divider
BEST MATCH

Express the equation in logarithmic form. 8^(2/3) = 4 = log() Need Help? Read It Watch It Submit Answer 7. [-/1 Points] DETAILS TANAPCALCBR10 5.2.020. Write the expression as a logarithm of a single quantity. ln(5) + \frac{1}{2} ln(x + 2) - 2 ln(1 + \sqrt{x}) Need Help? Read It Watch It Submit Answer 8. [0/1 Points] DETAILS PREVIOUS ANSWERS TANAPCALCBR10 5.2.022. Use the laws of logarithms to expand and simplify the expression. log(x(x^2+2)^(-1/2)) log x + \frac{1}{2} log(x^2 + 2) Check the plus and minus signs of all terms and/or values.

View Answer
 divider
BEST MATCH

Stainless steel balls of 1.2 cm diameter are to be quenched in water. The balls leave the oven at a uniform temperature of 900 °C and are exposed to air at 30 °C before they are dropped into the water. The convection heat transfer coefficient in the air is 125 W/m². For steel balls (density = 8085 kg/m³, thermal conductivity = 15.1 W/m °C, specific heat = 0.480 kJ/kg °C, thermal diffusivity 3.91x10?? m²/s). (a) Calculate the Biot number and discuss the validity of lumped capacitance model. (b) If the temperature of the balls is not to fall below 850 °C prior to quenching, determine the maximum time that the balls can stand in the air before being dropped into water.

View Answer
 divider
BEST MATCH

Suppose the continuous random variable X ~ ?(? = 10, ?² = 4). (i) Calculate the answer using in-built R-functions without standardizing. Note: if you want extra practice, standardize the normal distribution first, then check to see that you get the same answers using mu = 0 and sd = 1. a. $f_X(10)$ b. $F_X(11)$ c. $P[X \geq 9]$ d. $P[9 \leq X \leq 11]$ (ii) Use a sample of size 10000 to estimate the following. a. $F_X(11)$ b. $P[X \geq 9]$ c. $P[9 \leq X \leq 11]$ d. $E(X)$ e. $Var(X)$

View Answer
 divider
BEST MATCH

Problem 2.14: Consider a transfer function as follows \frac{Y(s)}{U(s)} = G(s) = \frac{\omega_n^2}{s^2 + 2\zeta\omega_ns + \omega_n^2} (2.417) (2.418) a) Find the Laplace transform of the input signal u(t) which is a rectangular pulse function, u(t) = 1(t - t_1) - 1(t - t_2) (2.419) where $t_1$ and $t_2$ are constants, $t_2 > t_1$. b) Find Y(s), c) Find y(t) using the inverse Laplace transform (use tables of Laplace transforms or PFE method). d) Confirm your results using Simulink or Matlab simulation for the following numerical values: $t_1 = 1.0 sec, t_2 = 3.0 sec, \omega_n = 10 rad/sec, \zeta = 0.5$.

View Answer
 divider
BEST MATCH

20 k$\Omega$ + + $V_1$ (+ 80 k$\Omega$ 24 k$\Omega$ $V_o$ 1 k$\Omega$ -

View Answer
 divider