Answer:
a. 14000
Explanation:
Given parameters:
Efficiency of the machine = 70%
Work done on machine = 20000J
Unknown:
Work done by machine = ?
Solution:
Efficiency of a machine is determined by;
Efficiency = 
70 = 
x 100
70 = 
Work done by machine = 70 x 200 = 14000J
A plasma is an ionized gas , a gas into which sufficient energy is provided to free electrons from atoms or molecules and to allow both species , ions and electrons to coexist , Gases can become plasma in several ways , but all include pumping the gas with energy,
Answer:
The lithosphere can affect the atmosphere when tectonic plates move and cause an eruption, where magma below spews up as lava above.
Explanation:
The lithosphere is broken into giant plates that fit around the globe like puzzle pieces. These puzzle pieces move a little bit each year as they slide on top of a somewhat fluid part of the mantle called the asthenosphere.
Answer: Static Electricty.
Explanation: ...
