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if you throw a ball upward with an initial speed of 4m/s at 1.5 above the ground, find the final velocity just before touching the ground
sodium hydroxide to copper(II) nitrate and use a stirring rod to test if the solution is basic. How do you establish whether the solution is basic
Two cylindrical bars, each with diameter of 2.30 cm, are welded together end to end. compute the resistance between the ends of the welded bar
A solution of h2so4 with a molal concentration of 6.80 has a density of 1.318 g/ml. What is the molar concentration
A closed ended manometer is used to measure the pressure in a tank of gas. what is the gauge pressure (in Pa) in the tank
Consider the circuit shown in the figure below, where C1 = 2.00 µF, C2 = 9.00 µF, and ?V = 18.0 V. Calculate the final charge on each capacitor
Explain how some solids (compounds that are solids at room temperature) can be analyzed by gas chromatography. Also, how can they be introduced into the injector port and column
an electric dipole has charges of +- 4.55pC that are seperate by 6.00cm. The dipole lies on the x axis and its center is at the origin. Determine the torque on the dipole about its center of mass
Is bacteria all bad, what role does bacteria play in our ecosphere? If so, why is there so much "anti-bacterial soaps" today?
Based on your knowledge of the TLC of the components of Excedrin, propose an experiment that would separate these components, including the order of elution off a chromatography column.
What is the concentration of the compound in a solution whose absorbance at 219 nm is A = 0.080 with a sample pathlength of 1.00 cm
A mass of 9.30 kg is suspended from a 1.45 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
When dissolved in water and reacted with excess silver nitrate, AgNO3 , 0.9855 g of AgCl precipitated. What is the percentage of Cl in the impure sample
Select a favorite biome and do some Internet research on what species are specific to the area. Which species is your favorite on land and in the water?
An ideal refrigerator utilizes a Carnot cycle operating between 0 degree C and 26 degree C. How much energy must be supplied to the refrigerator
When the magnesium is not allowed sufficient oxygen, some magnesium nitride, Mg3N2, forms. How does one decompose any magnesium nitride
You are given an unknown, colorless, solution that may contain only one salt from the following set: NaA, NaB, NaC. In solution each salt dissociates completely into the Na+ ion and the anion A-, B-
A parallel-plate capacitor is made of two flat metal plates pressed against a thin slab of dielectric material. What is the dielectric constant of the material that was initially used to fill the gap
Why would be difficult to isolate neutral p-aminobenzoic acid. What effect will pH have on the structure of your product
The normal range for the carbonyl group of a carboxylic acid in the IR spectrum is 1725 - 1700 cm-1. Why is the carbonyl group of benzoic acid appear at 1696 cm-1
Chromic acid is a diprotic acid H2CrO4 with Ka1 = 0.18 and Ka2 = 3.2 x 10-7. A solution of potassium chromate is prepared at pH 5.43. Calculate the fraction of the total chromate in this solution th
A hollow conducting sphere is surrounded by a large concentric, spherical, Using Gauss's Law, find the charges and the electric fields everywhere
Police investigators, examining the scene of an accident involving two cars, measure 72 -long skid marks of one of the cars, Estimate the initial speed of the car assuming a level road
The potential difference across a cell membrane from outside to inside is initially at -90 mV (when in its resting phase). How many ions move through the membrane
What are the pH and alkalinity of these three solutions immediately after you make them