The question asks for the term that defines the quantity of matter present in an object. We need to evaluate each option based on its scientific definition.
Correct Option: C) Mass is the fundamental measure of the amount of matter in an object. It is an intrinsic property that does not change with location or gravitational force.
The question asks about the potential concerns associated with nanoparticles used in industry. We need to evaluate each given statement regarding the environmental and health impacts of nanoparticles.
Since all three statements accurately describe potential concerns related to nanoparticles, the option that includes all of them is the correct answer.
Correct Option: D) 1, 2 and 3
The question asks about the characteristics of IceCube, a particle detector. We need to evaluate each statement to determine its accuracy in the context of modern scientific research and IceCube's purpose.
IceCube is indeed the world's largest neutrino observatory. It uses a cubic kilometer of ice at the South Pole as its detection medium. This statement is accurate.
While IceCube's primary mission is to detect high-energy neutrinos from astrophysical sources, it also contributes to the search for dark matter. Neutrinos could be produced from the annihilation or decay of dark matter particles, especially in dense regions like the center of the Earth or the Sun. Therefore, IceCube can function as a telescope for indirect dark matter detection. This statement is accurate.
IceCube consists of thousands of optical sensors (Digital Optical Modules or DOMs) deployed up to 2,450 meters deep into the Antarctic ice. This deep burial is crucial to shield the detectors from cosmic rays and other background noise, allowing for the detection of rare neutrino events. This statement is accurate.
D) 1, 2 and 3
All three statements accurately describe aspects of the IceCube Neutrino Observatory and its scientific objectives.
The question asks for the SI unit of the amount of substance. This requires knowledge of the seven base SI units and their corresponding physical quantities.
Correct Option: A) Mole is the SI unit for the amount of substance. It is defined as the amount of substance of a system that contains as many elementary entities as there are atoms in 0.012 kilogram of carbon-12.
The question asks why carbon dioxide (\(\text{CO}_2\)) can be easily liquefied and solidified. This property is related to the intermolecular forces present in the substance. Gases can be liquefied when their molecules are brought closer together and their kinetic energy is reduced, allowing intermolecular forces to dominate.
C) It has comparatively more force of attraction than other gases. This statement correctly identifies that stronger intermolecular forces are responsible for the ease of liquefaction and solidification of \(\text{CO}_2\). These forces allow the molecules to be brought closer together to form liquid or solid states under achievable conditions.
The question asks to identify the international organization with which the terms 'Agreement on Agriculture', 'Agreement on the Application of Sanitary and Phytosanitary Measures', and 'Peace Clause' are associated. These terms are specific to international trade rules and negotiations.
C) World Trade Organization. The 'Agreement on Agriculture', the 'Agreement on the Application of Sanitary and Phytosanitary Measures', and the 'Peace Clause' are all integral components of the World Trade Organization's framework, dealing with international trade rules, particularly in the agricultural sector.