Answer:
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Answer:

Explanation:
Given data:
exhaust velocity = 2.455 km/s
specific impulse = 294 second


Ve = effective exhaust velocity

Isp specific impulse
g_o = standard gravity

from above equation we have
[ 2.455 km/s = 2455 m/s]

Airborne fragments<span> of lava, called tephra, are ejected from a single vent. The lava cools rapidly and builds up around the vent, forming a crater at the summit. Cinder cone volcanoes are fairly small, generally only about 300 feet (91 meters) tall and not rising more than 1,200 feet (366 meters).</span>
The most significant advantage of using renewable energy sources is that is sustainable (as a result of the fact that is renewable) and the low Greenhouse Gas Emissions.Renewable energy sources do not pollute the environment it with Co2 and other toxic gases that are produced by fossil fuels.