Absolute magnitude - Study guides, Class notes & Summaries

A-level PHYSICS Paper 3 Section B Astrophysics Thursday 15 June 2023 Morning Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. • If you ...

Sociology 101 Straighterline Exam Questions and Complete Solutions __________ involves aspects of social life that have to do with order, stability, and social organization that allow societies and groups to hold together and endure. - Answer: Social statics Herbert Spencer viewed society as a system, having important similarities with - Answer: a biological organism __________ refers to processes of social life that pattern institutional development and have to do with social change. -...

Apparent and Absolute Magnitude Test Questions and Answers Absolute Magnitude cont... more - Answer-Stars more than 32.6 LY away appear dimmer than they are High apparent magnitude and low absolute magnitude If a star is 32.6 LY away, its absolute and apparent magnitudes will be the same. Hertzsprung-Russell (H-R) Diagram - Answer-Shows relationships between absolute magnitude and temperature of stars. Can also show the relationship between temperature and luminosity As temperature incre...

2 © OCR 2023 F F 2 Section A You should spend a maximum of 30 minutes on this section. Write your answer to each question in the box provided. 1 Which row contains only scalar quantities? A Absolute temperature, displacement, moment B Acceleration, force, momentum C Gravitational potential, kinetic energy, mass D Kinetic energy, mass, momentum Your answer [1] 2 Forces are applied to a circular shaft of diameter d. Which diagram shows a torque of a couple with magnitude Fd? F 2F ...

 -1.5 magnitude Sirius appears 25x brighter than 2 magnitude Polaris.  “All neutron stars are pulsars, but not all pulsars are neutron stars” FALSE  “Spectroscopic Binary” is the term given to a pair of stars that we can determine are orbiting each other only by measuring their periodic Doppler shifts.  A 6.8 solar mass neutron star does NOT exist.  A loop of gas and charged particles following the magnetic field lines between sunspot’s poles is a Prominence/...

when might overfitting occur - Answer- when the # of factors is close to or larger than the # of data points causing the model to potentially fit too closely to random effects Why are simple models better than complex ones - Answer- less data is required; less chance of insignificant factors and easier to interpret what is forward selection - Answer- we select the best new factor and see if it's good enough (R^2, AIC, or p-value) add it to our model and fit the model with the current set ...

What is the difference between brightness and luminosity? - Brightness is how it appears to us, distance is a factor. Luminosity is how much total light a star gives off. What is parallax? - Over the course of a year, the star's position in the sky appears to shift back and forth, returning to its original position 1 year later. The amount of this shift— the angle between one extreme in the star's apparent motion and the other— is equal to twice the parallax. You can use parallax to fin...

Cultural Awareness - ANSWER:Self-examination of one's own prejudices and biases toward other cultures. An in-depth exploration of one's own cultural/ethnic background. Cultural competence in nursing consists of four principles. - ANSWERCare is designed for the specific client. Care is based on the uniqueness of the person's culture and includes cultural norms and values. Care includes self-employment strategies to facilitate client decision making to improve health behaviors. Care is pr...

Adjusted R-Squared Correct Answer-A goodness-of-fit measure in multiple regression analysis that penalises additional explanatory variables by using a degrees of freedom adjustment in estimating the error variance. Alternative Hypothesis Correct Answer-The hypothesis against which the null hypothesis is tested. AR(l) Serial Correlation Correct Answer-The errors in a time series regression model follow an AR(l) model. Attenuation Bias Correct Answer-Bias in an estimator that is always to...

PLTW Principles of Engineering Latest Updated Graded A+ 1st class lever fulcrum in the middle; see-saw, hammer, scissors 2nd class lever fulcrum at the end, load in the middle; wheel barrow, car-jack 3rd class lever fulcrum at the end, effort in the middle; tweezers, baseball bat 5 Recycling & Material categories -Organics -Metals -Polymers -Ceramics -Composites 6 Types of Simple Machines -Inclined plane -Lever -Pulley -Screw -Wedge -Wheel and Axle Absolute pr...

To find the most accurate distance to a nearby star using parallax, astronomers could compare the view of the star against the background stars at what times of the year? - In January and July Which of the following correctly expresses the distance to a nearby star? - 1.3 parsecs Consider two stars (Y and Z) that both exhibit parallax. Star Z appears to move back and forth against the background stars by a greater amount than Y. Which star is farther away from Earth? - Star Y A star has a p...