A plant uses the energy from sunlight to create oxygen and glucose from carbon dioxide and water. Which statement is true about
2 answers:
Answer: A. A chemical change has occurred because new compounds have been produced.
Explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.Example: Melting of ice
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.Example: photosynthesis
Photosynthesis is the process used by plants, algae and certain bacteria to convert energy from sunlight and turn it into chemical energy in the form of glucose which is used a s a source of energy by many organisms.
Thus the true statement is a chemical change has occurred because new compounds have been produced.
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Answer:
K = 500 x 10⁶ MPa
Explanation:
Given that
P = 10 MPa
V= 0.25 m ³
Reduction in the volume ,ΔV=- 0.005 cm³
We know that 1 m = 1000 cm
ΔV=- 0.005 cm³ = - 0.005 x 10⁻⁶ m³
We know that bulk modulus given as
Now by putting the values
We get
K = 500 x 10⁶ MPa
Therefore the bulk modulus of the elasticity will be 500 x 10⁶ MPa.