Consider a spherical planet of uniform density rho. the distance from the planet's center to its surface (i. e., the planet's radius) is rp. an object is located a distance r from the center of the planet, where r
part a
find an expression for the magnitude of the acceleration due to gravity, g(r), inside the planet.
express the acceleration due to gravity in terms of rho, r, π, and g, the universal gravitational constant.

part b
rewrite your result for g(r) in terms of gp, the gravitational acceleration at the surface of the planet, times a function of r.
express your answer in terms of gp, r, and rp.

-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

hope this

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

b. a lightning bug, plug of grass, and a worm