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When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. What is the speed of the second train
A stretched string fixed at each end has a mass of 33.0 g and a length of 8.00 m. Determine the positions of the nodes for the third harmonic
A volume of 40.0 of aqueous potassium hydroxide () was titrated against a standard solution of sulfuric acid (). What was the molarity of the solution if 19.2 of 1.50 was needed? The equation is 2K
A 5.0 deep swimming pool measures 30 by 16. What force does the water exert on the bottom of the pool
What is the final temperature in a squeezed cold pack that contains 50.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18 for the solution, an initial temperature of 27.0 C, a
A large parallel plate capacitor has plate separation of 0.90 cm and plate area of 355 cm2. estimate How much work is done on the capacitor
A potter's wheel, a thick stone disk of radius .297 m and mass 109 kg, is freely rotating at 57.5 rev/min. Find the effective coefficient of kinetic friction between the wheel and wet rag
At the unspecified temperature dinitrogentetraoxide partially decomposes according to the following equilibrium
After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.65 below the surface. determine the fractional volume change in the spoon
An aluminum ring needs to be placed over a cylinder steel bar. At 10.00 degrees C, Find the temperature of the ring at which it fits over the bar
At a higher temperature, 373K, dinitrogentetraoxide partially decomposes according to the same equilibrium reaction but with slightly different results. The chemical equation is again
Estimate how many books can be shelved in a college library with 3400 of floor space. Assume 5 shelves high, having books on both sides
At a distance of 42 ft, an ionizing radiation source delivers 3.5 rem of radiation. How close could you get to the source and still have no biological effects
A car of mass 2800 kg collides with a truck of mass 4500 kg, and just after the collision the car and truck slide along, compute the velocity of the stuck-together car and truck
What is the complete and balanced chemical equation for. Lithium Sulfate+Lead(II) acetate ? Copper(II) nitrate+Sodium sulfide? Strontium nitrate+potassium iodide
Find the appropriate equilibrium constant (Kp) for the reaction below under the following conditions. 1/2 SNO2(s) + H2(g) <--> H2O(g) + 1/2 Sn(s)
A polar bear starts at the North Pole. It travels 1.0 km south, then 1.0 km east, then 1.0 km north, What was the bear's average speed
Does the effective buffer range of a buffer solution depend on the concentrations of the conjugate acid and base pairs in the buffer solution
5 moles of a monatomic gas has its pressure increased from 105 Pa to 1.5*105 Pa. calculate How much work is done by the gas
ldentify whether or not the reaction would favor the reactants or produ€ts under the specified conditions, and identify whether K gets smaller or bigger
Suppose your waffle iron is rated at 1.20 kW when connected to a 3.00 102 V source. What current does the waffle iron carry
A snow skier, starting from rest, goes downhill for 5.00s and reaches a level spot of smooth snow. What is the skier's average acceleration down the hill
The volume of the base required to neutralize the acid was 47.14 mL. Aqueous silver nitrate was then added to precipitate the Cl- and Br- ions as AgCl and AgBr. The mass of silver halides obtained w
A sound wave is traveling in seawater, where the adiabatic bulk modulus and density are 2.3 109 Pa and 1025 kg/m3, respectively. What would be the beat frequency heard by an underwater swimmer
The reaction between ethyl bromide (C2H5Br) and hydroxide ion in ethyl alcohol at 330 K, C2H5BR(alc) + OH-(alc) --> C2H5OH(l) + Br-(alc), is first order each in ethyl bromide and hydroxide ion.