Week Two
Hello
Everyone,
I
am thrilled at the quality of your work. Well done all of you!
This
week we are focusing on estimating quantities and accuracy of measurement as
well as distinguishing between heat and temperature.
So,
by the end of the week, all of you should be able to:
- estimate quantities like length, height and mass
- explain why measurements are not accurate
- differentiate between heat and temperature
(i)
Let's
start by asking you to compare your index finger with your thumb. Which one is
longer? By how much? How do you know? Of course it is obvious that the index
finger is longer than the thumb.
Activities:
(a)
I want you to estimate the length of each of those fingers and then get your
ruler to take actual measurement and compare the two results. How close are
they?
(b)
Estimate the mass of a coke bottle or juice pack when full and empty, then try
getting the mass using a scale. (If you run any difficulties post it using the “post a comment” tab on this
site).
(c)
Can you guess your height? Try it, then ask someone to measure your height and
compare the two results.
The
ability to estimate quantities in science is important and that skill has to be
developed.
(ii)
Measurements
can be wrong because of the following reasons:
-
Error in the device/instrument (how
well it has been made and calibrated)
-
Human error
(how well the device is used)
In the picture below, looking a
measuring device from points A or B causes parallax error.
Question: How can error come in when using analogue and digital wristwatches to measure time?
(iii)
Temperature is the degree of
hotness or coldness of an object while heat is a form of energy. The SI unit of
temperature is kelvin while heat energy is measured in joule.
Question: List five things that produce heat in your home in ascending order of
heat generated. Is it possible to estimate the value of heat generated by each
item?
Week One
Lesson 1:
How would you define matter and energy? I am sure you have come across these concepts in your science class. Look at your definition carefully and see if you can coin out something for physics. Can you? You can now check page 192 of your textbook.
Next, let's see if you can identify some branches of physics. Do you have a pair of glasses? Are you using public power supply now or a power generator? Have you heard of x-ray, do you listen to music on your phone or some other devices? By now you should be able to think of some branches like light, sound, electricity, medical physics and astronomy. Look at the list below for more
Branches of physics and their definition
(reference: www.squidoo.com; www.wiki.answers.com; www.buzzle.com & www.life123.com; http://physics.about.com)
Physics is a diverse area of study and in order to make sense of it
scientists have been forced to focus their attention on one or two smaller
areas of the discipline. This gives them the opportunity to become experts in that narrow
field.(reference: www.squidoo.com; www.wiki.answers.com; www.buzzle.com & www.life123.com; http://physics.about.com)
Some of the branches are:
- Acoustics - the study of sound & sound waves
- Astronomy - the study of space
- Astrophysics - the study of the physical properties of objects in space
- Atomic Physics - the study of atoms, specifically the electron properties of the atom
- Biophysics - the study of physics in living systems
- Chaos - the study of systems with strong sensitivity to initial conditions, so a slight change at the beginning quickly become major changes in the system
- Chemical Physics - the study of physics in chemical systems
- Computational Physics - the application of numerical methods to solve physical problems for which a quantitative theory already exists
- Cosmology - the study of the universe as a whole, including its origins and evolution
- Cryophilic/ Cryogenics / Low Temperature Physics - the study of physical properties in low temperature situations, far below the freezing point of water
- Crystallography - the study of crystals and crystalline structures ( what is a crystal? a solid containing an internal pattern of atoms, molecules, or ions that is regular, repeated, and geometrically arranged)
- Electromagnetism - the study of electrical and magnetic fields, which are two aspects of the same phenomenon
- Electronics - the study of the flow of electrons, generally in a circuit
- Fluid Dynamics / Fluid Mechanics - the study of the physical properties of "fluids," specifically defined in this case to be liquids and gases
- Geophysics - the study of the physical properties of the Earth
- High Energy Physics - the study of physics in extremely high energy systems, generally within particle physics
- High Pressure Physics - the study of physics in extremely high pressure systems, generally related to fluid dynamics
- Laser Physics - the study of the physical properties of lasers
- Mathematical Physics - applying mathematically rigorous methods to solving problems within physics
- Mechanics - the study of the motion of bodies in a frame of reference
- Meteorology / Weather Physics - the physics of the weather
- Molecular Physics - the study of physical properties of molecules
- Nanotechnology - the science of building circuits and machines from single molecules and atoms
- Nuclear Physics - the study of the physical properties of the atomic nucleus
- Optics / Light Physics - the study of the physical properties of light
- Particle Physics - the study of fundamental particles and the forces of their interaction
- Plasma Physics - the study of matter in the plasma phase (plasma is the 4th sate of matter)
- Quantum Electrodynamics - the study of how electrons and photons interact at the quantum mechanical level
- Quantum Mechanics / Quantum Physics - the study of science where the smallest discrete values, or quanta, of matter and energy become relevant
- Quantum Optics - the application of quantum physics to light
- Quantum Field Theory - the application of quantum physics to fields, including the fundamental forces of the universe
- Quantum Gravity - the application of quantum physics to gravity and unification of gravity with the other fundamental particle interactions
- Relativity - the study of systems displaying the properties of Einstein's theory of relativity, which generally involves moving at speeds very close to the speed of light
- Statistical Mechanics - the study of large systems by statistically expanding the knowledge of smaller systems
- String Theory / Superstring Theory - the study of the theory that all fundamental particles are vibrations of one-dimensional strings of energy, in a higher-dimensional universe
- Thermodynamics - the physics of heat, temperature and energy
Assignment (6 points): I want you to think of how physics is useful in a hospital, a cement factory and a TV station. click on the "post a comment" tab to write your response. Remember to put your name.
Lesson 2:
Extending lesson 1:
By now you can all define physics and mention some of its branches. Is there no other way to define it?
All the information we gather with our senses such as the presence of light and events - thunder, rainbow and wind are called phenomena. Therefore, physics can also be said to be the study of phenomena.
In lesson 2, our focus is physical quantities.
We will look at physical quantities, their units and symbols.
Go to page 194 and 195 of your textbook and study tables 13.1 - 13.3. The tables show the basic physical quantities, the associated units and symbols.
Assignment (10 points): In the notebook provided, answer questions 1-4 from page 194-195 for submission latest next Tuesday.
Lesson 3:
Fun activities
Click on these links to learn more and have fun on measurement of physical quantities
www.vocabulary.com/lists/26370
www.enchantedlearning.com
Week 1 quiz
Friday is here and the quiz is available. Click on the "Week One Quiz" below to take it. Remember to click submit when you finish. Good luck!
Week One Quiz
PLEASE NOTE THAT ALL ASSIGNMENTS ARE DUE LATEST NEXT TUESDAY.
15 comments:
(1)Physics is applied in nuclear reactor department in an hospital.
(2)Physics is used to trace cancer in the hospital.
(3)It helps in the efficiency of machine.
(4)It helps in the loading and off loading of goods using cranes.
(5)It helps in the transmission of signal.
(6) It helps to download or get information from the media.
Its Chiamaka
I think physics would be useful in
a) a hospital - Biophysics for instance would be useful in a hospital system because it is the study of physics in a living system - humans. Knowing more about the system could be useful when treating a patient.
b) a cement factory - branches of Physics such as Electromagnetism, mechanics and electronics would be useful in ensuring the machines work and work well, also to ensure there are no miscalculations or mishaps with the machinery.
c) a T.V station- It helps by the sending of signals, the work that cannot be done by humans and the electronic aspect too.
I hope these answers are appropriate
Seyni Abdoulaye
1. Hospital- physics is used for x-rays to check for diseases. It is also used to make drugs.
2. cement factory- Physics is used to make cement for buildings. It is also used to check the work load of the machine.
3. tv stations- It is used to send signal from the tv station to our homes. It is also used in the making of the camera used to broadcast movies, tv shoes, news, etc.
Radiotherapy can be used in hospitals,which is the use of rays to destroy cancer cells.
Acoustics can be used in tv stations,which is the study of sound waves.so sound waves can be transmitted.
classical mechanics can be used in cement factories,which is the study of forces and their effect on motion.Using this branch,simple machines could me made.
hey mr.Yinka its me Tomi B
1. physics could be used in the hospital by the use of a thermometer a thermometer has mercury in it to read the temperature of the patients and the doctors are physicians in a hospital.
in a cement factory
2a. the composition of row materials for the production of the cement.
2b. the working system of the machinery.
3. the transmission true cables and getting signal true the satellite uses physics in a tv station.
HOSPITAL
1.physic helps in the study of physics in living systems(Biophysics)
2.it helps in the regulation of the motion of bodies
3.physics helps and makes it possible for diagnosis to take place
4.physics help in carrying out different test,x-ray,and also provision of drugs
CEMENT FACTORY
1.the study of electrical and magnetic fields helps in the cement factory.
2.It helps in the efficiency of machine.
T.V.STATION
1.it helps in the study of sounds and sound waves
2.it helps in the study of the flow of electrons, generally in a circuit
3.It helps in the sending of signals
1. Hospital
In hospitals the use physics in the form of hospital equipments such as to check the eye sight, to check the blood check or blood pressure, and and scanning machine.
2. Cement factory
Physics is applied in a cement factory in a form of machines such as they use the machines to break down the rocks to make the into powder form.
3. T.v. Stations
Physics is used as a converter to convert waves for t.v. stations.
By: Javeeth Ali
(1)In hospitals physics can be used as radiotherapy for treatment for diseases, especially
for cancer.
(2)In a tv station physics can be used to send tv signals so that we can watch our favourite shows.
(3)physics can help cement factory with efficiency of machinery.
Subomi
Hospital-when they use thermometers and xray machines
Cement factory-when they use machinery
Tv station -to send signals
In the hospital, biophysics is used because humans are living things. Laser physics is used for things like laser surgery in a hospital.
In a cement factory, electronics will be needed to power the machines that will make the cement.
In a TV station, nanotechnology will be used to build the circuits for the TVs.
In hospitals physics can be applied in : x-rays to find out about peoples bones, they also use sound waves to check the organs,and also use electrons to power all the equipments in the hospital.
In a cement factory the chemicals are mixed together to make the cement and the machines also uses electricity.
TV station use magnetic fields to connect to antennas.
In hospitals physics can be applied in : x-rays to find out about peoples bones, they also use sound waves to check the organs,and also use electrons to power all the equipments in the hospital.
In a cement factory the chemicals are mixed together to make the cement and the machines also uses electricity.
TV station use magnetic fields to connect to antennas.
TOLUWANIMI ADEKEKE
(1) In hospitals when a sphygmomanometer is used to measure blood pressure.
(2)On a TV station to send signals.
(3) In a cement Factory to work machines.
Hospital-the aspect of physics that is applicable in the hospital is biophysics.for example,x-ray can be used to check for a fracture in bones or ribs.X-ray is a physics concept.
Cement industry-crystallography is the aspect of physics that is applicable to crystals and crystalline substances.Cements are made from substances which are crystalline in nature.Hence crystallographers can be used to check for the structure of cements.
T.v station-the aspects of physics that are applicable to t.v stations are electronics and electromagnetism.while electronics deal with the gadgets used in t.v stations electromagnetism deals with the transmission of t.v signals.
contribution of physics in hospitals in the following field-medical imaging,radiology,nuclear medicine
At a cement factory- raw materials, clinker and cement are analysed using X-ray fluorescence (XRF)
contribution of physics in a TV station-elctro-magnetic waves are used
for data transmission in the TV station
By Jonathan Joby
Post a Comment