To understand how to find the velocities of particles after a collision. there are two main types of collisions that you will study: elastic and perfectly inelastic. in an elastic collision, kinetic energy is conserved. in a perfectly inelastic collision, the particles stick together and thus retain the same velocity after the collision. there is actually a range of collision types, with elastic and perfectly inelastic at the extreme ends. these extreme cases are easier to solve than the in-between cases. let two objects of equal mass m collide. object 1 has initial velocity v, directed to the right, and object 2 is initially stationary. part a: if the collision is perfectly elastic, what are the final velocities v1 and v2 of objects 1 and 2? part bnow suppose that the collision is perfectly inelastic. what are the velocities v1 and v2 of the two objects after the collision? part cnow assume that the mass of object 1 is 2m, while the mass of object 2 remains m. if the collision is elastic, what are the final velocities v1 and v2 of objects 1 and 2? part dlet the mass of object 1 be m and the mass of object 2 be 3m. if the collision is perfectly inelastic, what are the velocities of the two objects after the collision?

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-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

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firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.