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Calculate the amount of benzoyl peroxide (C6H5CO - O - O - OCC6H5) initiator required to produce 1 kg of polyethylene with an average molecular weight of 200,000 g/mol. Each benzoyl peroxide molecule produces two free radicals that are each capable of initiating a polyethylene chain. Assume that 20% of the initiator actually is effective and that all termination occurs by the combination mechanism.The polyethylene produced above is used to make a rope. The rope weighs 0.5 kg per meter. Calculate:i. the number of polyethylene chains in a 3-meter length of rope.ii. the total length of chains in the rope, assuming that the length of one repeat unit is 0.24495 nm.the percent crystallinity of the rope if the density of the rope is 0.92 g/cm3 and of the amorphous polyethylene is 0.87 g/cm3. Also, the density of fully crystalline polyethylene at room temperature is found to be equal to 0.993 g/cm3.Calculate the amount of benzoyl peroxide (C6H5CO - O - O - OCC6H5) initiator required to produce 1 kg of polyethylene with an average molecular weight of 200,000 g/mol. Each benzoyl peroxide molecule
Anemometers (pictured) are used to measure wind speeds. Wind striking the cups causes the assembly to rotate; a gauge measures the frequency of this rotation and translates the data into wind speed. calculate the number of turns in the coil wire
An aircraft with a mass of 856 kg accelerates from 0 to 83 m/s in 9 seconds, at which time the aircraft launches. What is the kinetic energy of the aircraft
A sled slides along a horizontal surface on which the coefficient of kinetic friction is 0.28. Its velocity at point A is 8.0 m/s and at point B is 4.8 m/s. Use the impulse-momentum theorem to find how long the sled takes to travel from A to B.
question the charging circuit for the flash system of a camera uses a 130uf capacitor that is charged from a 250v power
In a Young's double-slit experiment the wavelength of light used is 476nm (in vacuum), Determine the angle that locates the dark fringe for which m = 0
The 2.0 m stick weighs 6.0 N and is suspended by support cords ateach end. Calculate the support force at the right end of the board
What is the maximum torque on a 150-turn circular coil of radius 0.7 cm that carries a current of 1.1 mA and resides in a uniform magnetic field of 0.15 T? Answer in units of N middot m
A child is riding a merry-go-round which completes one revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleration of the child?
Two identical clocks are synchronized. One is then put in orbit directed eastward around the Earth while the other remains on the Earth. Which clock runs slower? When the moving clock returns to the Earth, are the two still synchronized?
A second fragment, who's mass is 3.4 kg, moves away from the point of explosion with a speed of 418 m/s along the negative x axis. What is the speed of the third fragment? Ignore effects due to gravity.
margaret walks to the store using the following path .500 miles west .200 miles north .300 miles east. what is her
A satellite is kept in a circular orbit 3.0*102kmabove the surface of the Earth by the force of gravity. calculate the period of the satellite
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