Name the first three trophic levels. Among the consumers, which are most abundant? Use the "10% law" to explain why you would predict that there will be greater biomass of plants than herbivores in an ecosystem.

Suppose that, for a sample of size $n=100$ measurements, we find that $\bar{x}=50$. Assuming that $\sigma$ equals $2$, calculate confidence intervals for the population mean $\mu$ with the following confidence levels:

$$80\%$$

Find the one false statement in the following choices. Choose T if the statement is True. Choose F if the statement is False. LO 8.18, 8.A

High levels of immunoglobulins are in breast milk. T F

Atmospheric $CO_2$ levels have risen by nearly 20% over the past 40 years from 320 ppm to 400 ppm. What volume of $CO_2$ at $25 ^ { \circ } \mathrm { C }$ and 1.0 atm is dissolved in a 20.0--L bucket of today's rainwater?

The NMOS transistors in the circuit of Fig. P5.50 have $V_i=0.5 \mathrm{~V}, \mu_{\mathrm{n}} C_{\mathrm{ex}}=250 \mu \mathrm{A} / \mathrm{V}^2, \lambda=0$, and $L_1=L_2=$ $0.25 \mu \mathrm{m}$. Find the required values of gate width for each of $Q_1$ and $Q_2$, and the value of $R$, to obtain the voltage and current values indicated.

Assume that voltages in a circuit vary between 6 volts and 12 volts, and voltages are spread evenly over the range of possibilities, so that there is a uniform distribution. Find the probability of the given range of voltage levels. Between 6.5 volts and 8 volts

On the lines provided, rewrite each of the following sentences to correct the dangling modifier. You may need to rearrange or add words to make the meaning of a sentence clear.

Example 1. After an exciting day at the amusement park, dinner at home was relaxing.

$$\underline{\color{#c34632}\text{After an exciting day at the amusement park, we had a relaxing dinner at home.}}$$

Leaving through a gate that someone had left open, the road was blocked by the cows’ passage. _______________________________________________________________________________________________________________________________________________

Your ears can accommodate a huge range of sound levels. What is the ratio of highest to lowest intensity at $100 \mathrm{~Hz}$ ? (See Fig. 16-6.).

Suppose that, for a sample of size $n=100$ measurements, we find that $\bar{x}=50$. Assuming that $\sigma$ equals $2$, calculate confidence intervals for the population mean $\mu$ with the following confidence levels:

$$97\%$$

a. Plot the $I-V$ characteristics of a $1 \Omega, 100 \Omega$, and $1000 \Omega$ resistor on the same graph. Use a horizontal axis of $0$ to $100 \mathrm{~V}$ and a vertical axis of $0$ to $100 \mathrm{~A}$. b. Comment on the steepness of a curve with increasing levels of resistance.

Referring to the datasheet , determine the following: (a) typical $V_{\mathrm{GS} \text { (off) }}$ for the $2 \mathrm{~N} 3796$ (b) maximum drain-to-source voltage for the $2 \mathrm{~N} 3797$ (c) maximum power dissipation for the $2 \mathrm{~N} 3797$ at an ambient temperature of $25^{\circ} \mathrm{C}$ (d) maximum gate-to-source voltage for the $2 \mathrm{~N} 3797$

The pancreas

$$\textbf{\ \ a.}\text{ secretes insulin.}$$

$$\textbf{\ \ b.}\text{ secretes glucagon.}$$

$$\textbf{\ \ c.}\text{ helps regulate blood glucose levels.}$$

$$\textbf{\ \ d.}\text{ all of the above.}$$

With respect to given figure, verify that, for frictionless flow, the upstream velocity may be related to the water levels by

$$V_1=\sqrt{\frac{2 g\left(y_1-y_2\right)}{K^2-1}}$$

where $K=y_1 / y_2$.

The number of available nutrients$\rule{1cm}{0.4pt}$from the lower levels of the energy pyramid to the higher ones. a. increases $\hspace{2.13cm}$c. remains stable b. decreases $\hspace{2cm}$d. cycles