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Mastering Physics 1

What is the x component of A? ? Ax = 2.5 What is the y component of A? ? Ay = 3 What is the y component of B? ? By = -3 What is the x component of C? ? Cx = -2 In ordered pair notation, write down the components of vector B?…

Physics – Ch 3

operating with displacements according to the rules for manipulating vectors leads to results in agreement with experiments We say that the displacement of a particle is a vector quantity. Our best justification for this assertion is D Ch 3 #2 The vectors a, b, and c are related by c = b – a. Which…

Biology Unit 4 Chapter 7 – Ecological Succession

change in community over time; change is due to species present Explain what is meant by succession (2) stable community with few changes to populations Explain what is meant by a climax community (1) increased interspecific competition; for light Heather plants are small shrubs. Heather plants are the dominant species in the climax community of…

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Physics Practice Questions Chapter 4

B) an automobile battery Which has the greater mass? A) a king-size pillow B) an automobile battery mass A kilogram is a measure of an object’s D) all of these Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has twice as much A) inertia. B) mass. C) volume. E)…

Physics Review Part 2

D An object moving in the +x direction experiences an acceleration of +2.0 m/s2. This means the object A) travels 2.0 m in every second. B) is traveling at 2.0 m/s. C) is decreasing its velocity by 2.0 m/s every second. D) is increasing its velocity by 2.0 m/s every second. D Suppose that an…

USATESTPREP Biology (Ecology)

A) commensalism. Grazing cows disturb the grass and cause insects to fly around the cows as they eat. In turn, birds swoop in and eat the insects. This type of feeding relationship is an example of A) commensalism. B) mutualism. C) parasitism. D) predation. This type of feeding relationship is an example of commensalism. One…

Physics I Midterm

1) x = -1.5 For which of the values below is x > x^3? 1) 3.16 x 10^7, 86 400 One year is about ____ seconds while one day is exactly ____ seconds. 1) 3 800 Calculate (0.82 + 0.042) x (4.4 x 10^3), keeping only significant figures. 1) 0.13 cubic feet A cereal box…

Physics Practice Problems

-,+ An elevator is moving downward when someone presses the emergency stop button. The elevator comes to rest a short time later. Give the signs for the velocity and the acceleration of the elevator after the button has been pressed but before the elevator has stopped. +,- A child throws a baseball directly upward. What…

Physics Unit 6 Quizzes

William Gilbert The earliest ideas of charge were the result of experiments by: newtons Common units of electrical force are: lack of electrons A positive charge means: are charged with respect to the earth Lightning is formed when clouds: the sea, air, metals Charges exist in: has essentially no free electrons An insulator is a…

Biology 155 Chap 4-6

Which of the following help direct the movement of materials or organelles throughout the cell? rough endoplasmic reticulum, cytoskeleton, smooth endoplasmic reticulum Which of the following organelles is found uniquely in autotrophic, eukaryotic cells and not heterotrophic, eukaryotic cells? chloroplast After proteins are formed by the ribosomes located on the endoplasmic reticulum, what is the…

Physics study

dimensions of B = dimension of x/(dimension of t)2 = L/T2 or LT-2 (a) Suppose that the displacement of an object is related to time according to the expression x = Bt2. What are the dimensions of B? “x” is again “displacement”, so replace it with “L”: L = A sin(2?ft). They tell you that…

Conceptual Physics Ch 5

Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. Newton’s third law of motion A quantity that has both magnitude and direction. Examples are force, velocity, and acceleration. Vector quantity A quantity that has magnitude but not direction. Examples are mass, volume,…

Physics Multiple Choice 2

e. none Which of the following is a vector quantity? a. mass b. density c. speed d. temperature e. none of these e. horizontal component of projectile motion Which of the following is not an example of accelerated motion? a. vertical component of projectile motion b. circular motion at constant speed c. a swinging pendulum…

6th Grade Science Vocabulary Metals, Non-metals, Metalloids

An element that is typically a hard, shiny solid, is malleable, and is a good conductor of heat and electricity Metal An element that is usually a gas or brittle solid at room temperature, is not malleable or ductile, is a poor conductor of heat and electricity, and is typically not shiny Non-metal An element…

Student Exploration: Fan Cart Physics Essay

The experiments demonstrate Newton’s first law because the fans act as the unbalanced force. If the fan is blowing in one direction, it will make the cart accelerate, and if there are two fans blowing in opposite directions, the cart will remain at a constant velocity because it is a balanced force. I Activity B:…

Cartoon Physics Analysis Essay

Poem Analysis “Cartoon Physics, Part 1” Nick Flynn centers “Cartoon Physics, Part 1” around childhood innocence. He very strongly urges not only parents, but anyone around a young child to not force upon them knowledge they do not need to know. Flynn captures the simple kid mind and harsh reality with tone, imagery, figurative language,…

Mastering Physics Assignment Essay

Assume that air resistance is negligible and that the magnitude of the acceleration due to gravity is . What shape is the trajectory (graph of y vs.. X) of the shells? ANSWER: straight line parabola hyperbola The shape cannot be determined. For two shells fired at the same speed which statement about the horizontal distance…

Physics Behind Ferris Wheel Essay

Uniform Circular Motion Uniform Circulated Motion is defined as a movement of an object along the circumference of a circle or rotation along a circular path. It can be uniform, with constant angular rate of rotation (and constant speed), or non-uniform with a changing rate of rotation. The rotation around a fixed axis of a…

The Physics Behind Car Safety Features Essay

Cars contain several different types of safety features. These numerous safety features all have their own significance to the driver, as well as to the passengers. The purpose of this report is to show and express how physics is involved in automobile collisions and similarly how it is used to prevent injuries during accidents. Isaac…

Separation techniques in forensic science

The Use Of Separation Techniques In Forensic Science Forensic scientists employ many different separation techniques, these are indispensable for roll uping grounds to be used against to help the gaining control of an wrongdoer. There are many different techniques utilised to accomplish this from filtration to more specialised chromatography. I will research a smattering of…

Physics Lab Report Centripetal Force Essay

Centripetal force F is the net force causing the centripetal acceleration of an object performing uniform circular motion. Its magnitude is given by the equation: F = Mrs. When an object is whirled in horizontal circular motion in mid-air with a piece of string (as shown in figure 1 above), the centripetal force on the…

Physics IA critical angle of glass Essay

Aim To determine the critical angle of glass using a glass block Principle and Hypothesis The Kennel’s Law of Refraction says that – At the boundary between any two given materials the ratio of the sine of the angle of incidence and the angle of refraction is constant for any particular wavelength. The refractive index…

Physics M & M lab Essay

Purpose: To practice direct and indirect measurement Introduction: Do you think you could measure the average thickness of a sample of M&Ms without directly measuring selected M&Ms? The answer is “yes,” and in this activity you will make direct and indirect measurements of the thickness of M&Ms. You will compare the results and evaluate the…

Ib Physics Ia – Domino Effect Essay

Effect IA Investigate the effect of the distance between each domino on the time taken for all the dominoes to fall Independent Variable: Distance, d/CM, between each domino. The distance d/CM is measured between the middle of one domino to the middle of the next domino Dependent Variable: Time taken for all the dominoes to…

Physics Egg-Drop Report Essay

I. Problem/Purpose “In this experiment we want to investigate . We will change constant” the II. Prediction and measure the while keeping the “We predict that the straws would take in all the impact force, it’s because the straws has many collapsing points. This would help sustain in the eggs inside. Ill. Materials * Sponge…

Physics of Equestrian Essay

Math Exploration: The Physics Behind Equestrian Before this exploration begins, it is important to be informed of the definitions of many equestrian terms that will be used in this exploration. Equestrian: Of or relating to horseback riding or horseback riders. (Kirkland, Sarah) Walk: The walk has a distinct four beat rhythm. When the horse is…

Population Genetics Lab Report Essay

Anthropology 102 – LABORATORY EXPERIENCE 3 .POPULATION GENETICS LAB REPORT YourLab Reportshould include the undermentioned: A cover sheet that includes the LAB figure, your instructor’s name, your name, and the day of the month Answers to the theoretical exercisings Answers to the practical exercisings, including: A transcript of your lab informations sheets Calculations of cistron…

Evolutionary And Ecological Significances Of Mass Extinction Biology Essay

This paper will concentrate on how aggregate extinction events have led to development of assorted species. There have been six times when the mass extinction events have affected several species. This has led top several different new species of both animate beings and workss. Development refers to the alteration in the familial traits of a…

Physics Worksheet Essay

Suppose you are in a dark room. Can you see the objects in the room? Can you see the objects outside the room? Explain your answer Q. Write the two laws of reflection. Q. Write two differences between diffused and regular reflection. Q. Write whether in each case diffused or regular reflection takes place. A)…

Order Of Reaction With Respect To Sodium Thiosulphate Biology Essay

To analyze the consequence of reactant concentration on the rate of the reaction between Na thiosulphate and hydrochloric acid AND to find the order of Na thiosulphate. The reaction used in this experiment is between dilute hydrochloric acid and Na thiosulphate ( formula Na2S2O3 ) . You can see from the chemical equation below that…

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