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Water at a pressure of 3.2 atm at street level flows into an office building at a speed of 0.5 m/s through a pipe 5.6 cm in diameter. Calculate the water pressure in such a pipe on the top floor
One of the harmonic frequencies of tube A with only one end open is 1080 Hz. The next-highest harmonic frequency is 1320 Hz. Find the length of the tube A
An 8 g of ice cube at %u2013 120 C is put into a thermos flask containing 100 cm3 of tea at 850C. What is the drop in temperature for tea
Suppose 2.5 mol of an ideal gas is taken from a 6m3 to a volume of 3 m3 via an isothermal compression at 30 0C. Find work done during the compression
A 150 g Copper bowl contains 220 g of water, at an initial temperature T1. A 300 g Copper cylinder at 7000 C is dropped into the water, How much energy is transferred to the bowl
When extracting an organic compound from an aqueous solution into an organic solvent, e.g., diethyl ether, a chemist will sometimes add sodium chloride to the aqueous solution. What is the purpose o
Iodine-131 has a half-life of 8 days while iodine-125 has a half life of 60 days and are both used therapeutically for different purposes. what percentage of the iodine-125 has decayed
A mercury spill occurs in a lab whose temperature is 30 Degrees Celsius. The vapor pressure of gaseous mercury at this temperature is 3.65 x 10^-6 atm
In its own reference frame, a box has the shape of a cube 2.5mon a side. This box is loaded onto the flat floor of a spaceship, What is the volume of the box as we observe it
The following reaction is known to have a standard change in enthalpy of 148 kJ/mol and a standard change in entropy of 312 J/(mol•K) at 25ºC. What is the normal boiling temperature (º
In an X ray scattering measurement the first order diffraction peak is observed at angle 1= 17.4 deg. What is the angle of the third order peak
If the valve is open and the gasses mix and assuming that the temperature is constant, what is the final total pressure
what solid is left behind when you dissolve acetaminophen completely in 1:1 dichloromethane
Electrons are accelerated through a voltage difference of 145 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons
A small coil of 40 turns and a surface area 30 cm^2 has its plane perpendicular to a magnetic field B=0.5T. how much charge passes through the coil
Trouton's rule states that the entropy of vaporization of nanopolar liquid is 88 JK-1 mol-1.. the normal boiling point of 1-octene is 121.3 C and its melting point is -101.73 C determine the enthalp
If a electron after being accelerated by a potential difference of 100 V enters in a uniform magnetc field of 1T perpendicular. Calculate its radius of circular path described by it
If 8.0 moles of the gas A is placed in a 60.0 L tank with 1.0 moles of B at 0 degrees celsius and 1 atm, they react according to the equation: 2A(g) + B(g) ---> 3C(g) + D(g) How many moles are pr
A very small object carrying -3 x 10-6 C of charge is attracted to a large, How much Kinetic Engergy does the negatively charged object gain
This solution freezes at -0.159C calculate the degree of dissociation( the fraction of molecules dissociated) for the acid in this solution ( assume the mean ionic activity coefficient has a value o
If 8.0 moles of the gas A is placed in a 60.0 L tank with 1.0 moles of B at 0 degrees celsius and 1 atm, they react according to the equation. 2A(g) + B(g) ---> 3C(g) + D(g) How many moles are pr
An ice bag containing 212g of ice at 0 °C was used to treat sore muscles. When the bag was removed, the ice had melted and the liquid water had a temperature of 32.5°C.How many kilojoules of heat
An ENVIRONMENTAL SCIENCE CLASS An ENVIRONMENTAL SCIENCE CLASS
The random noise level of a buzzing mosquito is 32dB and that heard in a typical classroom is 71dB. How many mosquitos are required to make a noise level equivalent to that heard ina typical classro
A bottle containing 1 kg of water (18.01g/mol) is boiled until evaporation is complete. Find w, q, U, H for the process. Hvap = 40.6kJ/mol. My question is when we find the w what temperature we u