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In an experiment, 23.4g of iron sulphide, FeS (s) are added to excess oxygen, and 16.5 grams of iron (III) oxide, Fe2O3(s) are produced. the balanced equation for the reaction is: Calculate the prec
A proton is moving parallel to a uniform electric field. The electric field accelerates the proton and increases its linear momentum to 4.00 10-23 kg·m/s from 1.20 10-23 kg·m/s in a ti
Lee is explainig the lesson on minimum perimeters to Greg. He says to construct a rectangle with the lowest possible perimeter from 38cm of material, the dimensions have to be 18cm and the width 1cm
Your friend's mass is 65kg. If she jumps off a 110-cm high table, how far does the Earth move toward her as she falls? A 2.4kg object is moving along the x-axis at 1.55m/s.
The manager of a small business receives a shipment of five hard drives. Three hard drives are good and 2 are defective. If a computerrepairshop purchases 3 of this stock of hard drives from the sm
How many quarts of pure antifreeze must be added to 6 quarts of a 10% antifreeze solution to obtain 60% antifreeze solution?
Bats can produce and hear sounds w/ frequencies up tp 100000 Hz. a) what is the wavelength of the sound?
Discuss the discrete and orthogonal polynomials to least square approximations. Provide at least one example on each case to support your discussion.
An empty beaker weighs 41.19 g. When it is completely filled with water (density = 1.0 g/mL), the beaker weighs 92.92 g. (a) How many grams of water have been added to the beaker?
A saleswoman is working on a 3% commission basis. If she wants to make $3,000 in one month, how much must she sell?
What is the tidal acceleration between your head and your toes due to the Moon? And what due to the Earth? How do these compare to the acceleration due to the Earth's gravity?
The speed of sound is 343 m/s. At what frequency does the driver of the car hear the ambulance's siren? Answer in Hz.
One day, a person went to horse racing area, Instead of counting the number of human and horses, he instead counted 74 heads and 196 legs. Yet he knew the number of humans and horses there. How did
The crowd that heard the President speak was estimated to be 10,000 people. The actual crowd could be 750 people more or less than this. What are the possible varibles for the actual crowd size?
The total pressure on the surface of Titanis 1220 mmHg. The atmosphere consistsof 82 mol% N2, 12 mol% Ar, and 6.0 mol%Section 10.6of 82 mol% N2, 12 mol% Ar, and 6.0 mol%CH4. Calculate the partial pr
The massive Deep Horizon oil spill of 2010 released enough crude oil into the Gulf of Mexico to fill an entire swimming pool about 7 thousand times.
The maximum wavelenght for photoelectric emission in tungsten is 230 nm. What wavelength of light must be used in order for electrons with a maximum energy of 1.5 eV to be ejected?
A solution of HCl in water conducts an electrical current, but a solution of HCl in hexane does not. Explain this behavior in terms of ionization and chemical bonding?
Scientist has been working to find the protein responsible for alcohol metabolism. The scientist has been unable to isolate the alcohol metabolism protein from the thousands of other proteins.
Write the equilibrium law for the reaction. Calculate the equilibrium constant for the reaction at this temperature.
Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use; however, is a baseball, a stopwatch, and a friend on the ground below with
If the listener then moves toward the approaching source with a velocity of 25m/s, due west, he hears a frequency f2 that differs from f1 by 37 Hz. What is the frequency of the source? (Take the spe
While the level in the open end (connected to the manifold) was measured as 25.2 cm above the U-neck. What is the pressure, in torr, in the gas collection manifold?
The management of MACU Corporation is trying to determine the amount of each of two products to produce over the coming planning period. The following information concerns labor availability, labor
A national study found that treating people appropriately for high blood pressure reduced their overall mortality by 20%. Treating people adequately for hypertension has been difficult