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If the specific heat of water is 4.18 J/g x Celsius for a mass of 125 g of water which increased in temperature by .121 Celsius when 2.4 x 10^-4 g of sodium hydroxide (NaoH) was dissolved, what was
Find (a) the x-component, (b) the y-component, and (c) the z-component of the force on the segment of the conductor that lies between x = x1 and x = x2. Express your answer in terms of the variables
A rod 42 cm long moves in a plane perpendicular to a magnetic field of 500 G. The velocity of the rod is perpendicular to its length. Find the speed of the rod if the potential difference between th
Give a complete analysis of the following data collected for the % of sulfate in a sample: 17.26%, 17.48%, 18.85%, 16.88%, 15.74%, 17.68%.
What should be the concentration of the sodium thiosulfate solution in order that each mL of the solution correspond to exactly 10 mg of the hydrogen peroxide solution?
What is the magnitude and sign of the molar heat of vaporization of butane? Explain your reasoning using Hess's Law. is your sign for the heat of vaporization realistic? Explain.
The difference in pathlength traveled by the incoming and outgoing rays from a diffraction grating is 750 nm. If there was third order diffraction, at what wavelength would constructive interferenc
A galvanic cell (Zn/Zn2+ // Zn2+/Zn) was connected to a DC power supply with Current of 1.25 x 10^-2 A for 1.15 hours. Calculate how many mg Zn will attach to the cathode theoretically?
When selecting the appropriate wavelength and bandwidth for a spectrophotometric analysis, the bandwidth should be as large as possible but small compared with the band being measured. Why?
The mass of the drum is 150kg, and its radius is 0.76m.What is the magnitude of the torque the engine applies to the drum? Ignore the mass of the cable.
The electrical force on a pair of charges is 60 N. If those same charges are moved such that the new force between them is 15 N, what is the new distance between the charges?
An electric field is generated by a charge imbalance and the field is expressed by Coulomb's Law. What is the value (and UNITS) of the proportionality constant in Coulomb's Law?
Suddenly, the cheetah stops, turns, and then runs at 45 km/h eastward, as measured by a suddenly nervous crew member who stands alongside the cheetah's path. The change in the animal's velocity tak
A 10.0Kg sample of benzene treated with excess chlorine gas yields 10.4 Kg of Chlorobenzene. Calculate the percent yield of Chlorobenzene.
The edges of a cube consist of equal resistors of resistance R, which are joined at the corners. Let a battery be connected to two opposite corners of a face of the cube. What is the effective resis
The calorimeter has a heat capacity of 18.5J/degrees celcius, the water has a specific heat of 4.184J/g, and the iron has a specific heat of 0.444J/g What is the final temperature observed?
(a) Find the diameter of the image of Jupiter produced by the objective lens. (b) Find the angular size of Jupiter as viewed through the eyepieces. (c) How far should I place a marble (1-cm diameter
In an experiment a piece of magnesium ribbon is burned in air in a crucible. the mass of the mixture of MgO and magnesium nitride after burning is 0.470g.
Snow is falling vertically at a constant speed of 6.5 m/s. At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight, level road
Baking powder consists of a mixture of baking soda and a substance such as cream of tartar. Baking soda is sodium hydrogen carbonate, NaHCO3. In the production of carbon dioxide gas, baking powder a
At a certain instant, a 25-kg object is sliding eastward at a speed of 8.0 m/s, propelled by an eastward force of 125 N. The coefficient of kinetic friction between the object and the horizontal sur
The edge of a body-centered-cubic unit cell of an element Y was found to be 3.16 x 10^-8 cm. The density of the metal is 19.35 g*cm^-3. What is the approximate molar mass of Y?
A block of wood floats in fresh water with 0.596 of its volume V submerged and in oil with 0.855 V submerged. Find the density of (a) the wood and (b) the oil.
The mass of a tennis ball is 57.0 g, and the ball is typically in contact with the tennis racquet for 30.0 ms , with the ball starting from rest. Make a free-body diagram of the tennis ball during t
The concentration of nitrogen in water at 25°C was determined to be 7.2 × 10-6 M. Calculate the partial pressure of nitrogen at the surface of the water in mmHg.