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elena55 [62]
4 years ago
14

Which of the following statements best characterizes the surface of the planet Mars?The surface of Mars is continuously resurfac

ed by ongoing volcanic activity; consequently, there are almost no visible impact craters.All the big volcanoes are in the northern hemisphere of Mars, and most of the craters are in the southern hemisphere.Eighty percent of the surface of Mars is rolling plains, with a number of major volcanoes and only two continent-sized uplands.On Mars there are several moving lithospheric plates rimmed by long mountain chains, deep subduction trenches, and several large rift valleys.
Physics
1 answer:
butalik [34]4 years ago
4 0

All the big volcanoes are in the northern hemisphere of Mars, and most of the craters are in the southern hemisphere is of the following statements that best characterizes the surface of the planet Mars.


Hope this helps,

Davinia.

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4 years ago
A driver's foot presses with a steady force of 20N on a pedal in a car as shown.
azamat

Answer:

160N

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One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C, exhau
suter [353]

Answer:

actual efficiency is  47.78 %

Carnot efficiency  is 67.65 %

power output is 5.20 × 10^3 hp

Explanation:

given data

temperature = 1900°C = 1900+ 273 K = 2173 K

exhaust temperature = 430°C = 430 + 273 K = 703 K

fuel = 7.0 × 10^9 cal

work = 1.4 × 10^10 J

to find out

actual efficiency  and Carnot efficiency and power output of engine

solution

first we find actual efficiency that is = work / heat input

put the value and

input energy  = 7.0 × 10^9 cal  (4.184 J/1 cal)  = 29.29 × 10^9 J

actual efficiency  =  1.4 × 10^10 / ( 29.29 × 10^9 )

actual efficiency  =  0.4778

actual efficiency is  47.78 %

and

Carnot efficiency  is = 1 - ( 703 / 2173 )

so Carnot efficiency  is  = 0.67648

Carnot efficiency  is 67.65 %

and

power output  = work / time

power output  =  1.4 × 10^10 / 3600 sec

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so power output is 5.20 × 10^3 hp

5 0
3 years ago
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