Magnetic field is maintained stable by field frequency locking which is achieved by selecting substance with a powerful NMR signal and placed physically apart from the test sample (external lock) or dissolved within the test sample (internal lock). [2] 3. The Detector System The system consists of an appropriate electronic circuitry, a computer and peripheral devices to detect amplify and display the NMR signals. It is very sensitive and can sense the difference of frequency signs. The standard and test sample’s frequency can be differentiated by the detectors.
HSC Chemistry Assessment task 1 Nuclear Chemistry Research report 1. Distinguish between stable and radioactive isotopes and describe the conditions which a nucleus is unstable. To understand if an element is stable we first must understand what stability is. The stability of the nucleus is directly related to the strength of the forces that hold the nuclear particles together. These protons and neutrons of the nucleus are called nucleons.
Physics: Principles and Applications, 6e Giancoli Chapter 17: Electric Potential Conceptual Questions 1) Which of the following is not a vector? A) electric force B) electric field C) electric potential D) electric line of force Answer: C Diff: 1 Type: MC Var: 1 Page Ref: Sec. 17.1-17.8 2) One joule per coulomb is a A) newton. B) volt. C) electron-volt.
12. How does the fact that the Earth has a magnetic field help provide evidence for the theory of plate tectonics? The magnetic “structure” of the Earth is changing because of plate tectonics. 13. What were the main components of the atmosphere when the Earth formed, and what are the main components today?
5. mass number The ______________________ of an element is the total number of protons and neutrons in nucleus the______________________ of the atom. 6. neutrons The mass number is used to calculate the number of ______________________ in one atom of an element. In order to calculate the number of neutrons you must subtract the protons ______________________ mass number from the ______________________ . 7. Give the symbol and number of protons in one atom of: Lithium Iron Oxygen Li, 3 __________________ Fe, 26 __________________ O, 8 __________________ Br, 35 Bromine __________________ Copper Helium Cu, 29 __________________ He, 2 __________________ Hg, 80 Mercury __________________ Kr, 36 Krypton
The magnetic field permeates the tissue and causes the nucleus scale magnets in the tissues to rotate. By observing what frequencies are absorbed by the atoms the doctors can determine what sorts of atoms are present at a particular place in the body. 2. Explain how a sound is actually a form of energy? In what medium do sound waves travel?
HSC Syllabus Summary - Space 1. The Earth has a gravitational field that exerts a force on objects both on it and around it Students learn to: * Define weight as the force on an object due to a gravitational field. * Weight is the force on an object due to a gravitational field. This force is created by the gravitational field that surrounds the Earth: F=mg. This field, given by g=GMr2, (where g is the acceleration due to gravity or the gravitational field strength, G is he universal gravitational constant, M is the mass and r is the radius of the planet) acts on objects both on Earth and around it.
Planck's constant: the constant relating the change in energy for a system to the frequency of the electromagnatic radiation absorbed or emitted, equal to 6.626 X 10^-34 J 5. Quantization: the concept that energy can occur only in discrete units called quanta 6. Photon: a quantum of electromagnetic radiation 7. Photoelectric effect: ejection of electrons from a substance by incident electromagnetic radiation, especially by visible light 8. E=mc^2: Einstein's equation proposing that energy has mass; E is energy, m is mass, and c is the speed of light 9.
If the redeposit particles are bound together by compaction or | |cementation (formation of new secondary minerals in the spaces between the loose particles), sedimentary rocks are formed. In | |regions where the Earth’s interior temperature and pressure are high enough to change the chemical composition and mineralogy of | |buried igneous or sedimentary rocks, without completely melting them, metamorphic rocks are formed. Distinct groups or assemblages | |of minerals are typically associated with the formation of each of the three major rock types—igneous, sedimentary, and metamorphic| |rocks. Plate tectonics play a major role in the processes of mineral and rock formation. In geologic terms, a plate is a large, | |“rigid” slab of solid rock.
DEPARTMENT OF PHYSICS LAB REPORT FOR Title of Experiment: Newton’s Second Law Experimenters: Authors of this Report: Experiment Performed on: Monday, January 28th, 2013 Report Submitted on: Monday, February 4th, 2013 Teacher’s Assistant Name: Objective and Background Newton was the first one to identify the connection between motion and force. Newton’s second law of motion states that acceleration is dependent on two variables; the net force (F1 + F2 + F3 + F4 +...) and mass. This law states that the acceleration acting on an object is directly proportional to the net force and is inversely proportional to the mass of an object. For example; heavier objects require more force to move the same distance as lighter objects. Newton’s second law of motion is expressed as a mathematical equation: Fnet = ma (Force = mass*acceleration) A significant notion of this equation is that an object accelerates in the direction of the new force, and acceleration is created by the net force.