Study of body structure and function
Describe the rotation as a (a) counterclockwise rotation and (b) clockwise rotation. a. 90 degrees ↑ counterclockwise rotation about the origin b. 270 degrees ↑ clockwise rotation about the origin Write a rule for the rotation. $$(x, y) \rightarrow (\square, \square)$$
What is the volume of the rectangular prism? Type the answer in the boxes below.
Which is the correct relational terminology for the knee and for the ankle? A. The knee is anterior to the ankle, and the ankle is posterior to the knee. B. The knee is posterior to the ankle, and the ankle is anterior to the knee. C. The knee is proximal to the ankle, and the ankle is distal to the knee. D. The knee is distal to the ankle, and the ankle is proximal to the knee.
Draw the Lewis structure for the polyatomic formyl anion. Be sure to include all resonance structures that satisfy the octet rule.
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What is the value of *x*? - ☐ A. 170° - ☐ B. 70° - ☐ C. 10° - ☐ D. 30°
Why are decomposers, such as bacteria, important to an ecosystem's food web? A. They recover nutrients from dead matter and waste. B. They feed the primary producers. C. They take in energy from inorganic compounds. D. They provide nutrition directly to consumers.
# Kathryn is 1.8 m tall. Convert this height to feet. Round to the nearest tenth. Recall that: $$ \begin{gathered} 1 \mathrm{ft}=12 \mathrm{in} \\ 1 \mathrm{in}=2.54 \mathrm{~cm} \\ 1 \mathrm{~m}=100 \mathrm{~cm} \end{gathered} $$
Which is the best example of cephalocaudal development? A. Infant gains control over the arms before the hands. B. Infant can sit up before it can walk. C. Infant can roll over before it can grasp a small object. D. Infant can hear before it can see.
How many lines of symmetry does this rectangle have?
Explain the difference between dependent and independent variables.
Find the two whole numbers that are the closest to $\sqrt{42}$. Type the answers in the boxes below. Explain your reasoning.
What is the electron geometry of NH3 (ammonia)? A. Trigonal planar B. Bent C. Tetrahedral D. Linear
Which structures are common to both prokaryotic and eukaryotic cells? (Check all that apply.) Vacuole Cell membrane Golgi body Ribosome Cytoplasm Endoplasmic reticulum
Does DNA move toward red or black? Why is this? A. DNA moves toward red because red is positively charged. B. DNA moves toward black because black is negatively charged. C. DNA moves toward the positive electrode (red) due to its negative charge.
Facilitated transport does not require the cell to use energy because moving molecules from areas of higher concentration to areas of lower concentration is powered by diffusion. Is this statement True or False?
Complete the statement below based off explaining the shaded area on this graph under normal distribution with population standard deviation of 5.
# Try Again Your answer is incorrect. - $\mathrm{C}*{2} \mathrm{~S}*{2}$ : Your answer is incorrect. - BP: The name of this compound is not "boron phosphide". Be sure you know the correct names of all elements in this compound. Check the Periodic Table if necessary. Fill in the systematic names of the following chemical compounds. Note: for compounds containing hydrogen, you may give the common name instead. | molecular formula | name of compound | | --- | --- | | $\mathrm{Bl}*{1}$ | boron triiodide | | $\mathrm{C}*{2} \mathrm{~S}*{2}$ | carbon subsulfide | | BP | boron phosphide | | $\mathrm{CS}_{2}$ | carbon disulfide | | $\mathrm{H}_{2} \mathrm{O}$ | water | What is the maximum mass of pure lead that could be extracted from 2.5 kg of galena, a lead ore with the chemical formula PbS ? Be sure your answer has a unit symbol, if necessary, and is rounded to 2 significant digits.
What is the meaning of the suffix -rrhexis? A. involuntary contraction B. resembling C. rupture
What are the characteristics of echinoderms that are unique to them and not found in other phyla?
Explain why BH3 is trigonal planar and NH3 is trigonal pyramidal.
# Question 25.18 - Level 1 Homework + Answered ## Which of the following reactions produces acetyl chloride? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. Acetic acid and thionyl chloride b. Acetic acid and HCl c. Acetic acid and NaCl d. Ethyl acetate and ethyl chloride e. Acetic acid and chlorine gas ## **NOTE** ## Question 25.19 - Level 2 Homework + Unanswered ## Which of the following compounds can be converted to propanone upon treatment with methylmagnesium bromide followed by hydrolysis? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. Acetic acid b. Acetamide c. Ethyl acetate d. Acetic anhydride e. Acetonitrile f. Ethyl thioacetate g. Acetyl chloride
How many of the following molecules are polar? $\mathrm{PCl}_{5}$ CO $\mathrm{XeO}_{3}$ $\mathrm{SeBr}_{2}$
When you are tired, your A. peripheral vision B. ability to discern color C. forehead D. near sightedness E. iris shrinks.
Which best describes a codon? A. A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule. B. A protein that helps in the replication of DNA. C. A part of the cell that is involved in the process of translation. D. A segment of DNA that contains instructions for building a protein.
Which is a monomer of a protein? A. monosaccharide B. amino acid C. nucleotide D. fatty acid
How do you simplify $2 \sqrt{18}$ ?
What property of water is most important for living organisms?
What are the six kingdoms of life? A. Archaebacteria, Eubacteria, Animalia, Protista, Mammal, Plantae B. Archaebacteria, Eubacteria, Animalia, Protista, Fungi, Plantae C. Eubacteria, Animalia, Protista, Fungi, Species, Archaebacteria D. Insectae, Eubacteria, Animalia, Protista, Fungi, Plantae
# Use the following equations to find the lattice energy of $M g C l_{2}$. Hint: First write the equation for the lattice energy of $\mathrm{MgCl}_{2}(s)$. 1. [tex] $\mathrm{Mg}(\mathrm{g})$ \rightarrow $\mathrm{Mg}^{2}(2+)\left(\mathrm{g}+2 \mathrm{e}^{\wedge}-\right]$ 2. [tex] $\mathrm{Cl}(\mathrm{g})+\mathrm{e}^{\wedge}-\backslash$ rightarrow $\mathrm{Cl}^{\wedge}(\mathrm{g})$ ] 3. [tex] $\mathrm{Mg}(\mathrm{g})+2 \mathrm{Cl}(\mathrm{g})$ \rightarrow $\mathrm{MgCl}_{2}(s)$ ] Given values: - [tex] \Delta H = +2188 , \text{kJ/mol] } - [tex] \Delta H = -337 , \text{kJ/mol] } - [tex] \Delta H = -642 , \text{kJ/mol] }
What do your results indicate about cell cycle control?
Which of the following fractions is equal to 0.06? A. $\frac{1}{6}$ B. $\frac{1}{60}$ C. $\frac{1}{10}$ D. $\frac{1}{100}$
Find the difference: $$ \frac{2}{x+10}-\frac{3}{x+4} $$
Determine the value of *x* in the figure. $$\begin{array}{c} \text{(A)} \quad x = 9 \\ \text{(B)} \quad x = 3 \\ \text{(C)} \quad x = 6 \\ \text{(D)} \quad x = 4.5 \end{array}$$ The equation $$x = 3$$
The arc length $L$ of a curve given parametrically by $(x(t), y(t))$ for $a \leq t \leq b$ is given by the formula: $$ L=\int_{a}^{b} \sqrt{\left(x^{\prime}(t)\right)^{2}+\left(y^{\prime}(t)\right)^{2}} d t $$ A path of a point on the edge of a rolling circle of radius $R$ is a cycloid, given by: $$ \begin{aligned} & x(t)=R(t-\sin t) \\ & y(t)=R(1-\cos t) \end{aligned} $$ where $t$ is the angle (in radians) the circle has rotated. Find the length $L$ of one "arch" of this cycloid. That is, find the distance traveled by a small stone stuck in the tread of a tire of radius $R$ during one revolution of the rolling tire.
What’s the total magnification for 4x, 10x, 40x how do I calculate that My answer is 1,600 but I’m not sure if I did it right 4x objective view 10x objective view 40x objective view 40x objective view Total Magnification:
# Question 15 The volume of a 9-inch cube is $\qquad$ . O a. 243 cu yd O b. 729 cu in O c. 818 sq in O d. 1,243 cu in
Explain the role that heredity plays in skill-related fitness.
Use a calculator to find the square root of 74 and round to the nearest tenth. $$ d=\sqrt{74} $$ $$ d=[?] $$
1. Draw the Lewis structure for $\mathrm{ICI}_{4}{ }^{-}$in the window below and then answer the questions that follow. - Do not include overall ion charges or formal charges in your drawing. 2. Draw the Lewis structure for $\mathbf{S O}_{3}$ in the window below and then answer the questions that follow. - Do not include overall ion charges or formal charges in your drawing. - Do not draw double bonds to oxygen atoms unless they are needed for the central atom to obey the octet rule.