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gregory chen

gregory c.

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If you were describing the function of a plant cell's chloroplasts to your classmate, you would want to make all of the following points except a. Chloroplasts carry out photosynthesis, producing the food that sustains the plant. b. Chloroplasts are involved in the plant's synthesis of fatty acids and amino acids. c. Chloroplasts contain most of the cell's DNA. d. Chloroplasts aid the cell in its immune response.

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Given the pK_a of each acid, determine whether it is strong or weak. nitric acid, pK_a = - 2 Choose... sulfuric acid, pK_a = - 5 Choose... acetic acid, pK_a = 4.7 Choose... citric acid, pK_a = 3.1 Choose...

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Two 1.8 kg masses are located at either end of a 1.4 m long very light and rigid rod. What is the rotational inertia of the system about an axis through the center of the rod? The rotational imertia of the system is kg m^2

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The color of light received from a glowing, hot, solid object depends mostly on Group of answer choices its temperature. its composition. its magnetic field. its mass.

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Ergorul and Eichenbaum (2004) the ___ is essential to establishing memories that combine the 'what', 'when', and 'where' of an experience. ? hippocampus ? striatum ? cerebellum ? amygdala

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It is desired to make a conveyor belt using a start button and stop button, two motors and two sensors. There will be boxes on one conveyor belt and candy on the other. The purpose of this is to box the candies in 3 pieces. First, when the start button is pressed, the motor on the 1st belt will start and the box will move and it will stop when the sensor sees the box, then the second conveyor belt will move and the candies will fall into the box and after 3 candies pass through the sensor, the second conveyor belt will stop, then the 1st conveyor belt will move and a When it sees another box, it will stop again and again and this process will loop like this. Write the PLC program and solve its STL

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A structural component in the form of a wide plate is to be fabricated from a steel alloy that has a plane strain fracture toughness of 92 MPa$\sqrt{m}$ (ksi$\sqrt{in.}$) and a yield strength of 730 MPa (105900 psi). The flaw size resolution limit of the flaw detection apparatus is 4 mm (0.1575 in.). (a) If the design stress is one-half of the yield strength and the value of Y is 1.12, what is the critical flaw length?

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Part 1: Draw the Lewis Dot Structure for the following compounds: Steps and Rules: 1. Count the number of valence electrons available in the compound. (If it is a polyatomic ion, include the charge in the count.) 2. Draw a skeletal structure w/ the least electronegative element in the center. The structure should be as symmetrical as possible with a single bond placed b/w each atom. (Hydrogen is never in the center and can only have a single bond.) 3. Place any extra electrons in pairs around outer elements (starting with the most EN), until all electrons are used. If all the outer elements have complete octets, place pairs of electrons on the central element. 4. Check all elements for octets (8 electrons) Exceptions: H-2 e-; Be- 4 e-; B-6 e-; P-8 or 10 e-; S-8, 10, or 12 e-. 5. If all electrons are used and octets are not met, then take from the rich and share with the poor forming double or triple bonds until all octets are met. 6. Common Patterns: C-4 bonds; N-3 bonds and 1 lone pair; 0-2 bonds and 2 lone

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4. According to neoclassical economics, all human societies face the same problem, regardless of whether we are a primitive tribal community or a modern, highly advanced industrialized economy. The economic problem may be stated as: • how can society best transform scarce and limited economic resources with its given state of technology into goods and services in the presence of unlimited and insatiable human wants? Can this problem ever be solved? How does neoclassical economics approach the issue? Please

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2 1. Diffuser Compressor Combustion Turbine Nozzle chamber TA 6. 3 Iin P = const. 2 P= const. Figure 1: Simple schematic of a basic jet engine. 5 Yout 6 The thrust produced by the engine is due to the difference in momentum of the inlet and outlet fluid velocities (measured relative to the aircraft - so $v_{inlet}$ is equal to the speed of the plane), F = (mv)$_{exit}$ - (mv)$_{inlet}$ = m ($v_{exit}$ - $v_{inlet}$) The propulsive power of the engine is then W = F$v_{aircraft}$ = m$v_{inlet}$ ($v_{exit}$ - $v_{inlet}$) And finally, the propulsive efficiency of the engine is defined as Propulsive Power W $\eta_P = \frac{Propulsive Power}{Energy input rate} = \frac{W}{Q_{in}}$ where $Q_{in}$ is the heating value of the fuel used in the combustion process. (1) (2) (3)

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