Physics

Atoms

Isotope

Atom

Chemical element

Neutron

Protons, Neutrons, and Electrons Practice Worksheet Fill in the blanks in the following worksheet. Please keep in mind that the isotope represented by each space may NOT be the most common isotope or the one closest in atomic mass to the value on the periodic table. Atomic symbol Atomic number Protons Neutrons Electrons Atomic mass B 6 11 24 31 37 39 89 29 35 43 100 Pb 207 102 70 89 225 Mo 53 81 206 100 159 No 261 Yb 172 106 159 Finding Protons, Neutrons, and Electrons of Elements

Radioactivity and Nuclear Energy Notes

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Neutron

Radioactive Decay Activation Energy (Ea): The threshold energy that must be overcome to produce a chemical reaction Electromagnetic Radiation: Radiant energy that exhibits wavelike behavior and travels through space at the speed of light in a vacuum Radioisotope: a radioactive isotope Many nuclei are radioactive Radioactive: Refers to a nucleus that spontaneously decomposes to form a different nucleus Over 85% of all known nuclides are radioactive Nuclear Equation: an equation representing radioactive decay Types of Radioactive (Nuclear) Decay (The spontaneous decomposition of a nucleus to form a different nucleus): Alpha Decay Alpha () particle shoots out from nucleus equivalent to helium-4 Beta Decay Beta () particle shoots out from nucleus equivalent to an electron Gamma Decay

Holt Earth Science Chapter 18, Section 18.1

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Environmental Science

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Atmospheric thermodynamics

Phase transitions

Gases

Thermodynamic temperature

Water?s Changes of State Water exists in all 3 states of matter and is made of hydrogen and oxygen atoms. In all 3 stages of matter, these molecules are in constant motion (higher temperature: more movement). Difference between 3 states is the arrangement of the water molecules. A. Ice, Liquid Water, and Water Vapor Ice is made of water molecules held together by mutual molecular attractions.They form a tight, orderly network and don?t move - they vibrate in a fixed position. When ice is heated, the molecules vibrate more, and when the rate of movement increases enough, the bonds between the molecules break, resulting in melting In the liquid state, the molecules are still tightly packed but move fast enough to slide past each other (this causes liquid water to be fluid)

Holt Earth Science Chapter 12, Section 12.3

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Environmental Science

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Neutron

Atom

Radionuclide

Dating With Radioactivity It is possible to measure numerical values for the age of Earth?s geologic activities - in billions and millions of years - by using radiometric dating. A. Reviewing Basic Atomic Structure An atom has a nucleus with protons (positive) and neutrons (proton+electron combined = neutral) orbited by electrons (negative charge). Atomic Number = number of protons in the nucleus; each element?s Atomic Number differs. Atoms of the same element have the same number of protons. 99.9% of an atom?s mass is in the nucleus - electrons have hardly any mass. By adding together the number of protons and neutrons, the atomic mass of an atom is obtained. The number of neutrons varies (called isotopes; have different atomic masses).

Curve Ball Lab - MATH 273

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Calculus

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Mechanics

Physical quantities

Algebra

Kinematics

Force

Motion

Baseball pitches

Vector

Velocity

Work

Acceleration

Math 273 ? Lab 1 ? F 07 Curve Balls and Vectors Does a baseball pitch really curve or is it some sort of optical illusion? Assume the pitcher's mound is at the point (60, 0, 0) and that home plate is at the origin of our coordinate system. Suppose the pitcher throws the ball toward home plate and gives it a spin of s revolutions per second about a vertical axis through the center of the ball. This spin is described by the spin vector s where s points along the axis of revolution with length s. From aerodynamics we learn that this spin causes a difference in air pressure on the sides of the ball and results in a spin acceleration on the ball given by , where c is some empirical constant and is the velocity vector. The total acceleration of the ball is then ,

Entropy: Why Life Always Seems to Get More Complicated

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Psychology

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Philosophy of thermal and statistical physics

Continuum mechanics

Mechanics

State functions

Entropy

Second law of thermodynamics

Introduction to entropy

Entropy and life

9/30/2018 Entropy: Why Life Always Seems to Get More Complicated https://jamesclear.com/entropy 1/11 JAMES CLEAR Entropy: Why Life Always Seems to Get More Complicated by James Clear (staging.jamesclear.com/about)????| ???? Mental Models (https://jamesclear.com/mental-models) Murphy's Law states, ?Anything that can go wrong, will go wrong.? This pithy statement references the annoying tendency of life to cause trouble and make things difficult. Problems seem to arise naturally on their own, while solutions always require our attention, energy, and effort. Life never seems to just work itself out for us. If anything, our lives become more complicated and gradually decline into disorder rather than remaining simple and structured. Why is that?

gibs free energy

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Biology

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Thermodynamic free energy

Energy

Entropy

Activation energy

Chemical reaction

Endergonic reaction

Review ?Sheet ?for ?AP ?Biology ?Supplemental ?? ?Gibbs ?Free ?Energy ?Contributed ?by ?Winnie ?Litten ?? ?YouTube ?-?? ?/mslittenbiology ?Twitter-??@mslittenbiology ?

Electric Guided Notes

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Electromagnetism

Force

Physical quantities

Electricity

Electrical components

Electronic engineering

Voltage

Name ________________ Date ________ Block ___ GAC Physics Topic 5: Electric Currents Ch 17 5.1 Electric potential difference, current and resistance Electric Potential difference and Capacitance 5.1.1 Sec 1, Practice A, SR pg 601 Define electric potential difference. 5.1.2 Determine the change in potential energy when a charge moves between two points at different potentials. 5.1.4 Solve problems involving electric potential difference. 5.1.12 Sec 2, Practice B, SR pg 607 Relate capacitance to the storage of electrical potential energy in the form of separated charges. 5.1.13 Calculate the capacitance of various devices. 5.1.14 Calculate the energy stored in a capacitor. Electric Current and resistance Assessment statement Teacher?s notes 5.1.5

Simple Harmonic Motion Answers (2)

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Simple harmonic motion

Motion

Harmonic oscillator

Acceleration

Velocity

Tide

4.1 Simple harmonic motion 1a. [4 marks] This question is about simple harmonic motion (SHM). The graph shows the variation with time of the acceleration of an object X undergoing simple harmonic motion (SHM). Determine the maximum displacement of X. Give your answer to an appropriate number of significant figures. Markscheme use of ; or or ; } (allow answers in the range of T = 7.8 to 8.0 (s) or = 0.785 to 0.805 (rad s)) ; (allow answers in the range of 4.0 to 4.25 (m)) two significant figures in final answer whatever the value; Award [4] for a bald correct answer. Examiners report Similarly, this was well done. Most appreciated the need to truncate the final answer to a sensible number of significant digits (two in this case). 1b. [2 marks]

Simple Harmonic Motion Answers

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