Question Why is "loss of electrons" described as oxidation? Select all that apply. Historically, the reactions of a substance with oxygen was termed oxidation. Historically, the reactions of a substance with oxygen was termed reduction. When oxygen reacts it typically means oxygen acquires electrons from the substance with which it reacts. When oxygen reacts it typically means oxygen donates electrons to the substance with which it reacts. Oxidation now means the loss of electrons by a substance. Oxidation now means the gain of electrons by a substance. None of these

For the dissolving of ammonium nitrate in water, DH = 25.7 kJ/mol and DS = 108.7 J/mol.K. Calculate the Ksp for the process at 298 K. Answer:

Problem 2) Convert the following absolute voltage gain values to their decibel voltage gain equivalents: Decibel Equivalent Numbers to be converted i) 0.5 ii) 21 iii) 8 iv) 574 v) 0.006 Problem 3) Convert the following decibel voltage gain values to their absolute voltage gain equivalents: Absolute Equivalent Numbers to be converted i) 15 dB ii) 9 dB iii) -30 dB Problem 4) Convert the following decibel power gain values to their absolute power gain equivalents: Absolute Equivalent Numbers to be converted i) 15 dB ii) 9 dB iii) -30 dB Problem 5) On your first job as a communication system engineer, you were asked to determine the noise power to ensure that the communication system will have an 17dB signal-to-noise ratio at the receiver. Атр Channel Pin = 13dBm (Input Power) SNR=17dB G=80 L =53.333 PN = ??mW (Noise Power)

Consider the following sound wave, where t is in milliseconds: x(t)-sin(50πt)[-2cos(30m) +2cos(80t), This signal is prefiltered by an analog antialiasing prefilter H(f) and then sampled at an audio rate of 40 kHz. The resulting samples are immediately reconstructed using an ideal reconstructor (a lowpass filter with cut-off frequency 20kHz). Determine the Consider the following sound wave, where t is in milliseconds: x(t)-sin(50πt)[-2cos(30m) +2cos(80t), This signal is prefiltered by an analog antialiasing prefilter H(f) and then sampled at an audio rate of 40 kHz. The resulting samples are immediately reconstructed using an ideal reconstructor (a lowpass filter with cut-off frequency 20kHz). Determine the output ya(t) of the reconstructor in the following cases a. When the response of the prefilter is H() 4 (i.e. the prefilter is an amplifier) b. When H(f) is an ideal prefilter with cut off of 50 kHz, gain is 1. c. When H(f) is a practical prefilter that has a flat passband up to 20 kHz, gain is 1 and attenuates at a rate of 60dB/octave beyond 20 kHz.

The questions below refer to the diagram. Protein X is a putative regulator of cell polarity. Muun Epithelium Protein X فاقات Microfilaments Microtubules Nucleus ER Protein X EMT MET Protein X a. What does EMT and MET refer to in this diagram? Are these usually reversible states? What transition in cell polarity states does it involve? What processes are EMT and MET involved in during the lifespan of a human? (4 marks) b. During the EMT process, for a cell to migrate through a tissue, what must it do to the ECM? What enzymes are used to achieve this? (2 marks) c. Could Protein X be E-Cadherin? Explain your reasoning. (2 marks) d. If Protein X was a member of the Scribble complex, would its role be upstream or downstream from integrin signalling in directed migration? What would you expect the effect of the loss of function of Protein X be on microtubule organisation during directed migration? (2 marks)

Units V.C represents which quantity? Select one: a. Electric potential energy, U b. Electric Constant, k c. Electric Potential d. Electric Flux, F e. Electric Field, E

Transcribed image text: A solar system is modelled by R3, with a sun at the origin. Let D be R3 with the origin removed. The gravitational force field exerted by the sun on an object of mass 1 at the point (x, y, z) in D is given by F(x, y, z) = 1 (502 + y2 + 2) 0 (a) [1 mark] Show that F is conservative on R3 - (0,0,0). (b) (1 mark] A meteor of mass 1 is travelling in the solar system. At any time time t, the position of the meteor is given by R(t) = (t, t, t2 - 3) Calculate the work done by the sun on the meteor when 0 <t<2. (e) [2 marks] This solar system is covered in dust particles, which causes the same meteor as in (b) to gain mass as it travels through the solar system. If m is the mass of the meteor and s is the distance travelled by the meteor, then the rate at which m changes with respect to s at the point (x,y,z) is given by dm ds Calculate the total change in the mass of the meteor between t = 0 and t = 2.