Astrology, that unlikely and vague pseudoscience, makes much of the position of the planets at the moment of one’s birth. the only known force a planet exerts on earth is gravitational.
(a) calculate the gravitational force father exerted on a 4.20 kg baby by a 100 kg father 0.200 m away at birth (he is assisting, so he is close to the child).
(b) calculate the force f jupiter on the baby due to jupiter if it is at its closest distance to earth, some 6.29 x 10^11 m away.
(c) how does the force of jupiter on the baby compare to the force of the father on the baby father / of jupiter

(a)

              (b)  

              (c) The force of Jupiter on the baby is slightly greater than the the force of the father on the baby.

Explanation:

According to the law of universal gravitation, which is a classical physical law that describes the gravitational interaction between different bodies with mass:

  (1)

Where:

is the module of the force exerted between both bodies

is the universal gravitation constant and its value is

and are the masses of both bodies.

is the distance between both bodies

Knowing this, let's begin with the answers:

Using equation (1) and taking into account the mass of the father , the mass of the baby and the distance between them , the force  exerted by the father is:

  (2)

  (3)

Using again equation (1) but this time taking into account the mass of Jupiter , the mass of the baby and the distance between Jupiter and Earth (where the baby is) , the force  exerted by the Jupiter is:

  (4)

  (5)

Now, comparing both forces:

  and  we can see is greater than . However, the difference is quite small as well as the force exerted on the baby.

-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