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Category Archives: Science

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Motion Lab: A Stroll in the Hall (Discussion & Answers)

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 9, 2010Leave a comment

Introduction In the study of physics, velocity is defined as the rate of change in position in accordance to a reference point. It is therefore a vector quantity; both the scalar quantities of speed and direction are required to define it. In the SI system, it is measured in meters per second: (m/s) [N] meaning…

Lab: Refraction of Light- Air into Glass Answers

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 9, 20103 Comments

Lab Answers and Analysis 1)  A ray directed along a normal does not refract as it moves from one medium another; refraction will occur if the ray is travelling on an angle different from that of the normal through two different mediums. 2) When light travels from air to glass at an angle of incidence…

Fish and Shark Information

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 6, 2010Leave a comment

Fish: Aquatic vertebrate animals Typically cold-blooded Covered with scales Equipped with two sets of paired fins and several unpaired fins Kingdom: Animalia Phylum: Chordata The anatomy of Lampanyctodes hectoris (1) – operculum (gill cover), (2) – lateral line, (3) – dorsal fin, (4) – fat fin, (5) – caudal peduncle, (6) – caudal fin, (7)…

Forms of Energy

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 6, 20101 Comment

Energy forms are either potential or kinetic. Potential energy comes in forms that are stored including — chemical, gravitational, mechanical, and nuclear. Kinetic energy forms are doing work — like electrical, heat, light, motion, and sound. Forms of Energy Form of Energy Description Thermal The atoms and molecules of a substance possess thermal energy. The…

THE DIGESTIVE SYSTEM

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 5, 2010Leave a comment

There are many organs and structures that make up the Digestive system and these organs or parts have key functions or roles to play which could include one or more of these: DIGESTION – mechanically or chemically breaking macromolecules to smaller units Mechanical: large food molecules are shredded, torn and ground; this helps  to increase…

Ticker Tap Lab Discussion Questions

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 3, 20101 Comment

1)      The average velocity for an interval can be found by finding the slope of that interval. Using the tangent method or mid-point method to find the rise/run will give you the average velocity of the cart at that interval. 2)      For constant acceleration, the average velocity for the interval will be equal to the…

How we Hear: Speakers, Microphones, Reverberation, Screeh, Delay

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 2, 20101 Comment

Microphone Transducers, devices that change information from one form to another. A microphone consists of a diaphragm, a magnet, and a coil of wire. When you speak into it sound waves created by your voice vibrate the diaphragm which is connected to the magnet which is inside the coil of wire. These vibrations cause the…

Breathing Lab: Discussion Questions/ Answers

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 2, 20101 Comment

Member 1= 316200mL per day.Member 2 = 280800mL per day.Member 3= 302400mL per day.316200+280800+302400/3=899400/3=299800mLOn average our group takes in 299800mL of air per day. If I had just been working out before the lab then my breathing rate would be faster because my body would require more oxygen to meet my ATP consumption and ensure…

Artificial Sweeteners Analysis Questions

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 2, 20102 Comments

1) What does positive test mean? A positive test result indicates the present of whatever nutrient is being tested for. 2) What is the purpose of having a control? A control, such as distilled water, provides a basis to compare all results. Distilled water, which has been treated to remove all mineral and proteins, should…

Diagnosing Blood Diseases Analysis Questions

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 2, 20101 Comment

1) Function of: Red Blood Cell: Carry Haemoglobin White Blood Cell: Defending the body, removing infection Platelets: Blood Clotting 2) 5.5 billion per male/ 4.5 billion per female 3) 7,800,000 per male/ 6,430,000 per female 4) 150,000- 450,000 5) Red Blood Cells, Platelets, White Blood Cells 6) No. 7) This is because they are missing the “Helper T cell” (aka…

Pendulum Physics Lab: Answers & Explanation

ScienceBy William Anderson (Schoolworkhelper Editorial Team)May 1, 20102 Comments

Introduction A pendulum is a mass on the end of a string of negligible mass, which, when initially displaced, will swing back and forth under the influence of gravity over its lowest point. The regular motion of a pendulum can be used for timekeeping. Problem To identify the relationships between the frequency of a simple…

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