Numerade

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1. Calculate the uncertainty of the result of: \frac{8.1(\pm0.7)}{18.6(\pm0.1) \times 11.5(\pm0.6)} = 3.79(\pm?) \times 10^{-2} Show working.

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- (x) = = $$ \frac{x}{(x-2)(1-5x)} $$ State the domain of the function. (Enter your answer using interval notation.)

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Much of our communication occurs through technology, so it is important to make sure to present oneself as a professional both online and in person. © True False

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Explain how the 1960s "hippie" cultural phenomenon could be viewed as a counterculture, and how this contrasts with subculture. Explain how and why counterculture can be co-opted and stripped of countercultural elements.

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The Sanders family just bought 7 crates of eggs, and each crate had 12 eggs. The family already had 9 eggs in their refrigerator. How many eggs do they have now?

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True.

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Specific staining methods • Know the purpose of each step of Gram staining, what each step does to the appearance of the cell, and which cell wall types can be stained by this method (Chapter 4 Insight 4.2 on Gram staining) • Know the purpose of each step of Acid fast staining and which cell wall types can be stained by this method

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18. The Ka X ray in a certain element has an energy of 8585 eV. Identify the element by its atomic number. 25 Mn 26 Fe 27 Co 28 Ni 29 Cu 30 Zn 43 Tc 44 Ru 45 Rh 46 Pd 47 Ag 48 Cd 75 Re 76 Os 77 Ir 78 Pt 79 Au 80 Hg 107 Bh 108 Hs 109 Mt 110 Ds 111 Rg 112 Cn 19. In a certain one-electron atom, the longest wavelength at which the atom in its ground state can absorb a photon is 7.598 nm. What is the next longest wavelength at which a photon can be absorbed from the ground state of this atom? 20. A small helium-neon laser produces a light beam with an average power of 3.5 mW and a diameter of 2.4 mm. How many photons per second are emitted by the laser? The He-Ne laser wavelength is 632.8 nm.

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Which of the following quantities below can be used to find the equilibrium constant of a reaction without the need for any other known quantities? Select all that apply: ? The starting concentrations of all reactants. ? The concentrations of all reactants at equilibrium. ? The starting concentrations of all products. ? The concentrations of all products at equilibrium.

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(17%) Problem 4: A 19-µC point charge is moving along the x-axis as shown at a speed of $11.5 \times 10^6$ m/s. The point P shown has coordinates (0.55,1.1,0) m. Note that in this figure, the z-axis is positive out of the screen. 33% Part (a) What is the x-component of the magnetic field at the point P due to the charge, in tesla? $B_x = 0$ Correct! 33% Part (b) What is the y-component of the magnetic field at the point P due to the charge, in tesla? $B_y = 0$ Correct! 33% Part (c) What is the z-component of the magnetic field at the point P due to the charge, in tesla? $B_z = 1.29 \times 10^{-4}$

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kevin h.