(b) You will titrate 25.00mL of Histidine dihydrochloride solution of unknown concentration with the secondary standard NaOH. Use a value of 0.025M Histidine dihydrochloride to estimate the volume of NaOH required to completely deprotonate the histidine dihydrochloride. The concentration of NaOH is .1254 M. This calculated volume is an estimate of the third equivalence point. Use this value to estimate the first and second equivalence point volumes.

(c) Calculate the volumes at ~75% and ~90% of the three approximated equivalence points and record these values in the copied Data Table F from your manual pages.

Data Table F: Calc approximate volumes to reach endpoint

At time t’=0.4 ms, as measured by Alice, in the coordinate system K’, a particle is at the point x’=10 m, y’= 4m, z’=6m. (Note that this constitutes an event). Compute the corresponding values of x,y,z,t, as measured by Bob in coordinate system K, for

(a) the velocity of K’ relative to K along the common xx’ axis is v= +500 m/s

(b) the velocity of K’ relative to K along the common xx’ axis is v= −500 m/s and

(c) the velocity of K’ relative to K along the common xx’ axis is v= 2×108 m/s

(d) when you compare the answers of the different cases what do you notice about the role of the magnitude of the relative velocity (especially when comparing the results of a and b with the result of c)?

In the following spontaneous reaction, the mercuric ion is:

Hg²⁺ + Cu → Hg + Cu²⁺

Question options:

Based on the following reduction potential data, which is the strongest oxidizing agent?
E°_red = +1.78 V for H₂O₂(aq) + 2H⁺(aq) + 2e^- → 2H₂O(l)

E°_red = +0.800 V for Ag⁺(aq) + e^- → Ag(s)
E°_red = -0.130 V for Pb²⁺(aq) + 2e^- → Pb(s)

Question options:

hich of the following statements are FALSE?

Which of the following statements are FALSE?

An outbreak of Vibrio vulnificus occurred in people that ate oysters from a local restaurant. The oysters were traced backed to a farm that grows oysters in four separate salt-water ponds. You want to use PCR to determine which ponds are contaminated with V. vulnificus so you can decontaminate them. After collecting water samples from each pond and isolating the DNA from each sample, you perform PCR using V. vulnificus specific primers and obtain the results shown below.

A. What do you need in order to run the PCR besides your primers (things that go in the PCR and the thing that the PCR goes in)?

B. What makes your primers specific to V. vulnificus?

C. Based on the PCR results above, which pond (if any) should be decontaminated?

Matt is giving a presentation to his class about transformers. For one example he makes the following analysis: “The ratio of windings in this transformer from the primary circuit to the secondary circuit are 2:25. This makes it a step-up transformer. Since the voltage in the primary circuit is 10.0 V, the voltage in the secondary circuit will be (10.0 V)(25/2) = 125 V. The current in the primary circuit is 4.00 A, so the current in the secondary circuit will be (4.00 A)(25/2) = 50.0 A.” Is Matt’s analysis correct? If not, identify the mistake he made and correct it.

Draw two diagrams showing the direction of current induced in a coil both when a magnet moves toward the coil and when the magnet moves away. Use these to explain Lenz’s law and why the current is in the directions indicated.

thank you

1.include working in your answers

1a) If a long wire is carrying a current of 5.5 A, how far away from the wire would the magnet field strength be 1.0E-5 T?

1b) A transformer is used to step down from the New Zealand mains voltage of 230 V to 110 V for use with an electric razor from the USA. (i) If the razor draws a current of 0.25 A what current (at least) is drawn from the 230 V line? (ii) What is the ratio of the loops in the primary and secondary coils of the transformer?

1c) A ball is dropped from a height of 2.2 m in a train travelling at 25 m/s and accelerating at 1 m/s2 . How far will the ball miss the spot directly below where it was dropped?

7. An electric heater is rated at 1000 W, a toaster is rated at 1500 W, and an electric grill is rated at 2000 W. The three appliances are connected in parallel to a common 120 V circuit. (a) How much current does each appliance draw? (b) Is a 30 A circuit breaker sufficient in this situation?

8. (a) A 4 µF capacitor is connected to a 5 V battery.

(i) How much charge is stored on its plates when it is fully charged?

(ii) How much energy is stored by it when it is fully charged?

b) Three capacitors with capacitances, C1 = 1 F, C2 = 2 F, and C3 = 3 F, are connected to a 5-V source. What is the effective capacitance when the capacitors are connected in (i) series, (ii) parallel

For both resistances, plot the discharge curve of ln(V/V0) vs. time. From the slope of the line, calculate C (capacity). Please explain in detail how to plot/determine some of the values of ln(V/V0), how to determine the slope of the graph, and if possible demonstrate using Excel. Thank you.