The delorean featured in the movie is an actual car, made by john delorean. he had originally envisioned the car would produce 200 horsepower, but eventually settled on 170 horsepower output for the engine. in the united states, the vehicles were required to have catalytic converters, causing a 40 horsepower reduction in output power. if the delorean requires 850 kilojoules to reach a speed of 60 miles per hour, how much longer does a us model take to reach 60 mph than its european counterpart?

Explanation:

Power is by definition energy per unit time P=E/t, so the time it takes to provide an energy E at power P is t=E/P. We have the energy (E=8.5\times10^5J) and both powers,  (=170hp and =130hp, 40hp less than ), which for converting to Watts we only need to multiply the power in hp by the conversion factor 745.7W/hp.

We can then calculate the difference between the times asked:

Which for our values means:

-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

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s