Answer:
70/100 X 2000 = 1400 tonnes of iron.
Explanation:
take the percentage of iron oxide and divide with overall amount of iron oxide using 2000 tonnes of hematite ore. 1400 tonnes of iron will be produced. this is not the percentage. if you want the percentage of iron produced just divide.
70/100 x 200 = 1400 tonnes of iron
percentage of iron produced = 70/1400 x 100 = 5 % of iron produced from 70% of iron oxide in 2000 tones of hematite ore
Astronomers use the Doppler effect<span> to measure the frequency of light waves as an object is moving with respect to the observer</span>
The correct answer is D, earthworms eat the dirt, and then release it into the soil. They turn the dirt and soil into fertilizer so to speak. Worms also leave holes in the ground, which is good for water and air for the plants roots, but that isn't an option.
Answer:
Gravitational force is given by:
F=G×
d
2
m×M
Distance between two masses is increased s.t. new distance is D= 5 d
New gravitational force F
1
=F
Let on of the mass is changed to m
1
so as to maintain the same gravitational force.
Sorry this is late but I will cause energy transformation
hope this helps :))
