Explanation:
An observation is defined as the process which explains how it is happening (qualitative) and and quantitatively able to measure something about the process.
A law is defined as a verified statement that will remain true under the mentioned circumstances as it is based on the past observations that are carefully tested.
A theory is defined as the explanation of an aspect of natural world that can be tested, modified or rejected as a result of further experiments.
Hence, the given statements are classified as follows.
(a) All matter is made of tiny, indestructible particles called atoms - Theory
(b) When iron rusts in a closed container, the mass of the container and its contents does not change - Observation
(c) In chemical reactions, matter is neither created nor destroyed - Law
(d) When a match burns, heat is evolve - Observation
Answer: Explanation:
Conductivity of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is Siemens per meter.
Photosynthesis is the ability for a plant to turn light into energy, thus feeding it
Answer:
120 liters
Explanation:
From the question,
Applying boyles law
PV = P'V'................ Equation 1
Where P = initial pressure, V = Initial Volume, P' = Final pressure, V' = Final Volume.
make V' The subject of the equation
V' = PV/P'............. Equation 2
Given: P = 2 kpa, V = 60 liters, P' = 1 kpa
Substitute these values into equation 2
V' = (2×60)/1
V' = 120 liters
Hence the right option is A. 120 liters
