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In a piston cylinder assembly , the pressure and the tempreture of air are 200 KPa and the 500 c initially. The piston cross-sectional area is 0.2 m^2.The air is now cooled. what is the pressure in
An arrow is fired from a castle tower at an angle of 40 degrees above horizontal, and with a speed of 62 m/s. What is the speed of the arrow as it hits the ork
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, what is the associated uncertainty
A cubic metal box with sides of 18 cm contains air at a pressure of 1 atm and a temperature of 311 K. Find the force due to the internal air pressure on each wall
The Earth's orbit has a radius of 1.52·1011 m, and that of Mercury has a radius of 6.98·1010 m. What is the length of a vector from Earth to Mercury
A 9.15 kg object on a horizontal frictionless surface is attached to a spring with k = 2350 N/m. find the initial potential energy of the block-spring system
The specific heat of a 98 g block of material is to be determined. The block is placed in a 25 g copper calorimeter that also holds 60 g of water. Determine the specific heat of the block
The specific heat of a certain metal can be determined by measuring the temperature change that occurs when a piece of the metal is heated, What is the specific heat of the metal
Draw the three organic product and the one inorganic product of the following acid catalyzed dehydration reaction.
Can someone explain to me what is metastability, what does it mean. If you could, can it also be explained in terms of geology
The temperature of the water rose from 25.00 degree C to 28.21 degree C. Assuming all the heat from the metal was transferred to the water, calculate the specific heat of the metal.
Calculate the pH of a solution prepared by mixing 20.5 mL of a .5 M sodium flouride solution with 32.5 mL of a .750 M hydrofluoric acid solution
During an experiment, a student mixed 14.5 mL of a .5 M sodium flouride solution with 15.6 mL of a .750 M hydrofluoric acid solution. The measured pH was 3.24. Calculate the pKa.
A dipole has a +5e charged particle and a -5e charged particle separated by a distance of 6 nm. What is the magnitude of its dipole moment
If the coal is burned in teh DPH power plant that uses 2300 tons of coal per day, what is the daily production of calcium sulfite, if the conversion is 98%? if 50 pounds of calcium oxide costa $13.5
Two charges are brought together until they are 90.0cm apart, causing the electric force between them to increase by a factor of exactly 6. What was their initial separation distance
An electron and a proton are separated by 2.4 nm, What is the magnitude of the force on the electron
What is the net ionic equation for the precipitation reaction, if any, that occurs when an aqueous solution of Zn(CH3CO2)2 is mixed with an aqueous solution of CaCl2
A combination mercury- steam turbine takes saturated mercury vapor a boiler at 500 C and exhausts to steam boiler at 240 C. what is the ideal efficancy of this combination
In a two-phase region the value of Xb determines the relative proportions of the two phases in the system. What is the expression for molar proportion Xv
Pressure was exerted with a piston on molten naphthalene at 95°C. The vapour pressure of naphthalene under 1.0 bar is 2.0 kPa and its densityis 0.962 g cm 3. What is its vapour pressure when the
A positive charge of 0.800? C is located in a uniform field of 9.00×104 N/C. How close are the two charges
A uranium and iron atom reside a distance R = 43.90 nm apart. The uranium atom is singly ionized; What is the magnitude of the force on the electron from the uranium ion
Dave needs to get groceries from the store, which is a distance of D=2.8km east of his house, What is the direction of Dave's displacement for the entire trip
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off