Test Answers on Astrophysics Flashcards

Physics Chapter 15

At a certain depth in the ocean, the absolute pressure is p. If you go to twice that depth (treating the water as incompressible) the absolute pressure will be less than 2p If you double the pressure on the surface of a can of water, the buoyant force on a stone placed in that water […]

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Physics Test 3

When you touch a cold piece of ice w your finger, energy flows… from your finger to the ice the fact that a thermometer takes its own temperature illustrates… thermal equilibrium the lowest possible temperature in nature -273 degrees C heat energy is measured in units of… calories and joules double the absolute temperature of […]

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Physics Test 2 Final Review

Additive Primaries Red, Green, Blue or RGB Subtractive Primaries Cyan, Magenta, Yellow or CYM Red+Green+Blue= White Cyan = Green + Blue Magenta = Red + Blue Yellow = Red + Green White – Red = Green + Blue (Cyan) White – Green = Red + Blue (Magenta) White – Blue = Red + Green (Yellow) […]

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Physics Ch. 5

When you push against a wall with your fingers, they bend. Identify the force or forces involved. You exert an action force and the wall exerts an equal and opposite reaction force. A boxer can hit a heavy bag with great force. Why can’t he hit a piece of tissue paper in midair with the […]

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Physics Option D, Astrophysics

Critical Density Density for which the curvature of the universe is zero/at which it will expand forever but will reach zero/at which the universe will begin to contract after an infinite amount of time. Stellar cluster Stars that are gravitationally bound forming an arrangement in space. Constellation A collection of stars that form a recognisable […]

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Astrophysics PART 4

Newton’s Model of the Universe The universe is infinite in both space and time. It is uniform and static. Meaning there are an infinite number of stars heading out in all directions to infinity (otherwise the universe would collapse under its own gravitational force) Obler’s Paradox Question Why is the night sky dark? or Why […]

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Physics – Topic D: Astrophysics – D.1 Stellar Quantities

Comets Comets are irregular objects a few kilometres across comprising of frozen gases, rock and dust. Stars (Single & Binary) All stars initially form when gravity causes gas in a nebula to condense. As the atoms move towards one another, they lose gravitational potential energy that is converted into kinetic energy. This raises the temperature […]

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Frosci midterm (Brain and Behavior + Astrophysics)

neuron cells – nerve cells – carry electrical pulses that transfer from 1 neuron to another – over 100 billion in brain – 3 parts: 1. cell body (grey matter) 2. dendrites (grey matter) 3. axons (white coated in myelin) signals picked up by dendrites –> cell body –> action potentials (electrical charge) –> axon […]

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Astrophysics Flashcard

The Universe A large collection of billions of galaxies Galaxy Large collection of billions of stars Our sun A star in the milky way galaxy Planets Orbit a star dwarf planet Small planets Moons orbit planets artificial satellite Orbit earth, built by humans Asteroids Lumps of rock and metal, found in asteroid belt, orbit sun […]

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Astrophysics Part 2

Kepler’s Third Law Square of the period of any planet is proportional to the cube of the semi major axis of its orbit Stellar Parallax Created by orbital position. Max shift is when the earth is at opposite sides of the sun. Once angle found, distance is calculated via trigonometry. Photosphere Coolest part of the […]

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AQA Physics Astrophysics

Convex lens A lens that causes light to be focused towards a point, an image formed is real, inverted Concave lens A lens that causes light to spread out, an image formed is vertual and diminished Focal point The point at which several light rays converge Magnifying power The ratio of the objective lens focal […]

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Astrophysics Study Guide Answers

Binary Star Two stars orbiting a common centre Black Dwarf The remnant of a white dwarf after it has cooled down. It has very low luminosity. Black Hole A singularity in space-time; the end result in the evolution of a very massive star. Brown Dwarf Gas and dust that did not reach high enough temperatures […]

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IB Physics Topic Option E Astrophysics

Define a planet. •Celestial body that orbits around the sun •has sufficient mass for its self gravity •has cleared the neighborhood around its orbit Define astroids. Between orbits of Mars and Jupiter, smaller orbiting bodies Define comets. •small orbiting body •loose particles of ice and rock that are blown off by the solar wind forming […]

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Physics – Option E – Astrophysics

Absolute magnitude The apparent magnitude a star would have if observed from a distance of 10 pc. Apparent brightness The received energy per second per unit area of detector. It equals b = L/4(pi)d^2. Its units are Wm^-2. Apparent magnitude A measure of brightness of a star as seen form earth in a relative system […]

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Glossary (Nuclear, Thermal and Astrophysics) AQA Physics A Unit 5A

Absolute magnitude (M) The apparent magnitude a star would have if it were placed at a standard distance of 10 pc from Earth. m – M = 5 log(d/10) where d is the distance in parsecs. Activity (A) The number of emissions per second, measured in Becquerels. Airy disc The bright central region in an […]

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AST 101 Exam 2 Laws of Astrophysics

Keplers 1st Law (Orbital Motion) Planets travel in elliptical orbits with the sun as a focus Keplers 2nd Law (Orbital Motion) The line going from the Sun to the planet sweeps out equal areas in equal times *Explains relationship between planets around the sun Keplers 3rd Law (Orbital Motion) The time that a planet takes […]

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Astrophysics Questions And Answers

Outline the likely evolution of the star Khad after it leaves the main sequence Since it has a mass greater than 1.3 Ms, it will go through a super red giant, onto a supernova to a neutron star or black hole. Red supergiant star: • Large luminosity • Red color • Relatively low surface temperature […]

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Astrophysics Definitions

What is the universe? a large collection of billions of galaxies What is a galaxy? A large cluster of stars What is a solar system? a star with orbiting planets What is a planet? A large sphere of matter that orbits the sun What is an exoplanet? A planet orbiting around a star other than […]

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Astrophysics IB PHYSICS HL

Solar system Mercury, venus, earth, mars, jupiter, saturn, uranus and neptune. Stellar clusters Groupings of a large number of stars bound by gravity. 1. Globular clusters: large number of mainly old stars. 2. Open clusters: small number of young stars that are farther apart. Galaxy A huge assembly of stars bound together by gravity. Cluster […]

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Astrophysics for People in a Hurry

Einstein’s General Theory of Relativity The presence of matter and energy curves the fabric of space and time around it. Molecules A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction. Atoms A unit of matter; the smallest unit of a chemical […]

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Astrophysics Test

Sun 99% of the mass of the solar system made mostly of H/He gas (plasma) converts 4 million tons Mercury Made out of metal and rock, large iron core cratered, desolate, long, tall, steep cliffs Venus Earth’s twin because size surface hidden by clouds 1 day Venus 243 days earth hellish conditions due to an […]

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