Astudent carries a glass cube whose length of the edge (l) is 4.425 cm. the density of the glass is 3.755 g/cm3 . she drops the cube, and a piece having a mass of 19.40 g breaks off. to repair the cube, student adds plastic having a density of 2.355 g/cm3 and reshapes the cube to its original shape and size. (a) what is the volume of the plastic part? (b) what is the volume of the composite object? (c) calculate the volume of the glass. (e) calculate the mass of the glass. (f) what is the mass of the composite cube? (g) calculate the density of the new composite cube.

-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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the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

the answer is a. hope this .