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April 23, 2014

Homework Help: Physical Education

Recent Physical Education Questions

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Physical Science 9
how did chadwicks discovery of nutrons change the atomic model
Monday, March 17, 2014 at 8:16pm

Physical Science 9
In an ionoic bond how many valence electrons would an atom have?
Monday, March 17, 2014 at 8:03pm

language arts
Need to confirm if the verbs in the sentences are physical or mental actions: 1. Other Americans in the Olympics challenged their opponents, too. Mental 2. Wilma dazzled the crowds in the track & field competition. physical 3. Al Oerter, an American discus thrower, dominated ...
Monday, March 17, 2014 at 7:16pm

language arts
Need to confirm if the verbs in the sentences are physical or mental actions: 1. However he won only 2 medals --Physical 2. Spitz also teamed with three other Americans in 3 relay races - Physical 3. In total, Spitz won s7 gold medals in a single Olympics---physical 4. That ...
Monday, March 17, 2014 at 6:56pm

physical science
Period = 1/f = (1/5.3)10^-14 seconds distance = speed * time lambda = 3*10^8 m/s * (1/5.3)* 10^-14 = .566 * 10^-6 meters = 566 * 10^-9 meters 10^-9 meters is nanometers, usually used for visible light wavelength
Monday, March 17, 2014 at 4:59pm

physical science
Green light has a frequency of about 5.3Hz~10Green light has a frequency of about 5.3Hz~ 10^{14}. Using the relationship speed of light (c)=fƒÉ find its wavelength in air.
Monday, March 17, 2014 at 4:17pm

Physical Science
This is the trouble with OTEC (Offshore Thermal Energy Conversion) where the difference in temperature between deep ocean water and water at the surface (in tropics of course) can be used to run a turbine system and generate electricity or whatever. However the efficiency is ...
Monday, March 17, 2014 at 2:06pm

Physical Science
heat in = SH * m * delta T SH = heat in / ( m* delta T)
Monday, March 17, 2014 at 1:38pm

Physical Science
go boom !
Monday, March 17, 2014 at 1:36pm

Physical Science
heat out = specific heat of water * mass of water * (30-0)
Monday, March 17, 2014 at 1:36pm

Physical Science
Heat out = Specific heat of ice * mass of ice * change in temp
Monday, March 17, 2014 at 1:34pm

Physical Science
P V = n R T well, R does not change :) R = P V/(nT) = P' .5V /(.5n 2T) = P'(.5)V/(nT) so .5 P' = P P' = 2 P
Monday, March 17, 2014 at 1:33pm

Physical Science
greater than Carnot cycle 1 - (Tcold/Thot) T in KELVIN (dge C + 273)
Monday, March 17, 2014 at 1:30pm

Physical Science
if you mix hot and cold water and get warm water the entropy is higher, even if the energy did not change. The availability of that energy is what changed. Between a glass of hot water and a glass of cold water you can run an engine. However there is not much you can do with a...
Monday, March 17, 2014 at 1:28pm

Physical Science
increase
Monday, March 17, 2014 at 1:23pm

Physical Science
The entropy of an isolated system always do what when natural processes occur?
Monday, March 17, 2014 at 12:34pm

Physical Science
The second law of thermodynamics forbids a heat engine to have thermal efficiency of what?
Monday, March 17, 2014 at 12:34pm

Physical Science
A sample of gas has its number of molecules halved, its Kelvin temperature doubled, and its volume halved. What is the new pressure, relative to the original pressure?
Monday, March 17, 2014 at 12:33pm

Physical Science
On a winter day the temperature drops from –5°C to –15°C overnight. If a pan sitting outside contains 0.49 kg of ice, how much heat is removed from the ice for this temperature change?
Monday, March 17, 2014 at 12:32pm

Physical Science
An ice tray with 175 g of water at 30°C is placed in a freezer at –9°C. How much energy must be removed from the water to lower its temperature to the freezing point?
Monday, March 17, 2014 at 12:32pm

Physical Science
If the volume and the number of molecules remain constant for a gas, a temperature increase causes the pressure to do what?
Monday, March 17, 2014 at 12:31pm

Physical Science
When 8 kcal of heat is added to 2.4 kg of a substance, its temperature increases 23 C°. What is the specific heat of the substance?
Monday, March 17, 2014 at 12:30pm

Science
Some animals, but not humans, have an organ called a gizzard located near the top of their digestive tract. This organ is small and can contain small rocks. It also has thick, muscular walls. Based on this physical description, which of the following is most likely to be the ...
Sunday, March 16, 2014 at 11:25pm

Science
Different from what? Each different substance has distinct chemical and physical properties.
Sunday, March 16, 2014 at 8:07pm

Physical Science 9
Add water, run the filtrate thru a filter, leaving iron, and sand, and wood. use a magnet to take away the iron. physically pick out the wood chips, leaving the sand. Now, evaporate the salt water, leaving salt.
Sunday, March 16, 2014 at 4:56pm

Physical Science 9
2 H2O ----> 2 H2 + O2 That is a reaction in the outer valence electron shells so despite being a physicist, I call it chemical.
Sunday, March 16, 2014 at 3:48pm

Physical Science 9
when an electric current is passed through water 2 gasses are formed is this a chemical or physical change
Sunday, March 16, 2014 at 3:44pm

Physical Science 9
How would you separate a mixture of iron fillings , salt, sand, and wood chips
Sunday, March 16, 2014 at 3:06pm

Physical Science 9
mass heat in = specific heat * mass * temperature rise
Sunday, March 16, 2014 at 2:59pm

Physical Science 9
a compound
Sunday, March 16, 2014 at 2:58pm

Physical Science 9
when exposed to the same amount of heat for the same amount of time, a 3 g sample of copper will experience a greater temperature change then a 12 g sample of copper due to its smaller what?
Sunday, March 16, 2014 at 2:45pm

Physical Science 9
a substance made of two or more elements chemically combined in a set ratio or proportion is called what
Sunday, March 16, 2014 at 2:41pm

Physical Science 9
Pressure. When you reduce the pressure over a liquid surface to below vapor pressure, it boils off. If you increase the pressure, it does not boil until a higher temperature (eg - pressure cooker). The pressure is high enough in the can to hold the contents in a liquid state, ...
Sunday, March 16, 2014 at 2:39pm

Physical Science 9
the contents of a can of air freshener are gaseous when sprayed but remain a liquid in the can due to what?
Sunday, March 16, 2014 at 2:32pm

Science
do pure substances have different chemical and physical properties?
Sunday, March 16, 2014 at 12:35pm

physical science
seconds
Saturday, March 15, 2014 at 5:12pm

stat
A physician routinely makes physical examinations of children. She is concerned that a three-year-old girl has a height of only 87.8 cm. Heights of three-year-old girls have a mean of 97.5 cm and a standard deviation of 6.9 cm (based on data from the National Health and ...
Saturday, March 15, 2014 at 3:24pm

Life science, history, geography, and maths literacy
Its evene wrc for me coz am doin the same subjects and physical sciences
Saturday, March 15, 2014 at 8:19am

physical science
a particle moves from rest and accelerated at 5.00m/s2. how long does it take to travel m?
Saturday, March 15, 2014 at 7:29am

Phys/Ed Please Help
1. Select the skill-related component which is defined as the ability to combine strength and speed while you are moving. A. balance B. coordination C. power D. speed 2. At the paintball field, Wynonna is always the first one on her team to be hit with the paintball and put ...
Friday, March 14, 2014 at 1:27pm

Physical Science
546 m
Friday, March 14, 2014 at 9:33am

Physical Science
1.5 m/s
Friday, March 14, 2014 at 9:22am

8th Grade Science (Periodic Table)
1. What conclusions can be drawn about the relationship between the arrangement of elements on the periodic table and the patterns observed in their properties? Properties of elements are related to atomic numbers. Properties of elements are related to ductility. Properties of...
Thursday, March 13, 2014 at 12:39pm

Physical Science
Visible light photons are not energetic enough to penetrate skin and flesh.
Thursday, March 13, 2014 at 12:01pm

Physical Science
X-rays can take pictures of your bones but visible light cannot. Explain why. Homework question, please and thank you!
Thursday, March 13, 2014 at 11:52am

Physical Science
30m
Wednesday, March 12, 2014 at 11:34pm

science, pls explain this!
A chemical change has occurred The products are not water anymore but two different entities. If it were a physical change (ice (solid H2O) to liquid water to steam(water vapor) you have H2O in all three phase so the water has not been broken down to different substances as in...
Wednesday, March 12, 2014 at 9:29pm

physical science
its poop
Wednesday, March 12, 2014 at 9:14pm

science
ok, so i saw somebody already put this question here a few min ago but the answer wuz confusing... 25. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of –183°C and the other has a ...
Wednesday, March 12, 2014 at 9:01pm

science, pls explain this!
25. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of –183°C and the other has a boiling point of –253°C. Has a physical change or a chemical change occurred? Explain. (6 ...
Wednesday, March 12, 2014 at 8:28pm

physical science
Fn = 10-3 = 7 N. = Net force.
Tuesday, March 11, 2014 at 8:43pm

physics
Under what conditions is mass conserved? A. Whenever the system is isolated or closed. B. Only when the change is a chemical one. C. Always. D. Only when the change is a physical one. I was thinking A.
Tuesday, March 11, 2014 at 2:32pm

Science help
A student combined water, sugar, and salt into a beaker. Which of the following statements are true? a. The individual substances can be separated by physical means.** b. The individual substances cannot be separated by physical means. c. A new substance is made of two or more...
Monday, March 10, 2014 at 2:11pm

Health & P.E. pls check my answers!!!!!
hi, can someone pls check my answers asap!!??? 1.Select the community activity that is a healthy choice to promote fitness for all ages A.annual 5K fun run for charity*** B.annual state fair C.monthly movie in the park D.monthly laser light show at the planetarium 2.Reginald ...
Monday, March 10, 2014 at 1:18pm

physical science
d = 200mi/h[120o] * 1.5h = 300mi[120o] X = 300*cos120 = -150 mi = 150 mi West. Y = 300*sin120 = 260 mi North.
Sunday, March 9, 2014 at 9:54pm

physical
Xo = 250 km/h A = 30o Vo = Xo/cosA = 250/cos30 = 288.7 km/h. Yo = Vo*sin30 = 288.7*sin30 = 144.3 km/h
Sunday, March 9, 2014 at 3:34pm

physical science
A horizontal force of 10 Newtons acts on a 2 kg block on a level surface.The frictional force between the block and the surface is 3 Newtons.What is the magnitude and the direction of the net force acting on the block?
Sunday, March 9, 2014 at 12:37pm

Physical Science
Describe convection in a room heated by a radiator.
Saturday, March 8, 2014 at 3:50pm

Business Math
As a newly hired staff accountant for Jordan Designs, you have been asked to conduct the year-end physical inventory. During the process, you observe that much of the inventory is outdated and there fore could not be sold for the recorded cost. You recommend to your manager ...
Saturday, March 8, 2014 at 3:25pm

Physical Science
22. Why does a heat pump need an external source of energy (such as electrical energy)?
Saturday, March 8, 2014 at 2:37pm

physical science
An airplane trvels with a velocity of 200 mi/h in a direction 30 deg. west of north of 1.50 h. How far north and how far west is it from its starting point?
Friday, March 7, 2014 at 8:49pm

physical
an airplane takes off at an angle of 30 to the horizontal. if the component of its velocity along the horizontal is 250 km/h , what is its actual velocity? also find the vertical component.
Friday, March 7, 2014 at 10:09am

Physical Chemistry
bhjbj
Thursday, March 6, 2014 at 10:45pm

Physical Science
?????????????
Thursday, March 6, 2014 at 7:12pm

Physical Science
395.5
Thursday, March 6, 2014 at 11:41am

physical sciences
a volley ball(diameter:20 cm)
Wednesday, March 5, 2014 at 11:24pm

health
How can communities and government help promote physical activity initiatives? A. Raise taxes B. Lower taxes C. Eliminate sidewalks D. Create walking trails
Wednesday, March 5, 2014 at 5:08pm

science
physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, esp. as distinct from energy.
Wednesday, March 5, 2014 at 1:37pm

PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!
Determining the appropriate amount and types of insurance to buy will depend on several factors that are unique to each in�dividual. Discuss these QuotesChimp at length with the insurance company representative before you buy.
Wednesday, March 5, 2014 at 8:23am

Chemistry
Compare the physical and chemical properties of acids and bases.
Tuesday, March 4, 2014 at 8:52pm

Chemistry
Compare the physical and chemical properties of acids and bases.
Tuesday, March 4, 2014 at 7:31pm

Science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Tuesday, March 4, 2014 at 12:48pm

Science
1.   What would happen to an object if the force of gravity on Earth was decreased by half?  (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2.   Which of the following ...
Tuesday, March 4, 2014 at 11:53am

Physical Chemistry
m
Monday, March 3, 2014 at 8:37pm

Physical Chemistry
L
Monday, March 3, 2014 at 8:03pm

Physical Sciences
constant velocity means NO ACCELERATION therefore just the weight 80 * 9.81 = 785 Newtons
Monday, March 3, 2014 at 2:25pm

Physical Sciences
A man with a mass of 80KG stands on a bathroom scale on the floor of a lift. Determine the reading of the scale if the lift moves downwards with a constant velocity at 2metre per second.
Monday, March 3, 2014 at 2:19pm

onors Physical Science
T
Monday, March 3, 2014 at 10:13am

Physical Science
c = (5/9)(F-32) c = (5/9)(86-32) = 30 deg C I do not know what you are using, perhaps: V = 331.4 + .6 C V = 331.4 + .6(30) = 349.4 m/s d = 349.4 * 2.3 = 804 meters period = 1/653 lambda = 349.4 * 1/653 = .535 meter
Sunday, March 2, 2014 at 4:23pm

Physical Science
2 d = 1400 * .16 d = 112 meters deep 2 d = v t 2 * 1000 * 3.5 = 1400 t t = 5 seconds
Sunday, March 2, 2014 at 3:50pm

Physical Science
The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from the main siren, and what is the wavelength of ...
Sunday, March 2, 2014 at 2:34pm

Physical Science
An ultrasonic wave in water is a compression wave that travels at 1,400 m/s A) An ultrasonic wave from a ship travels to the bottom of a lake and back in 0.16s. How deep is it at this point? B) If an ultrasonic wave is emitted in the ocean where the ocean's depth is 3.5km...
Sunday, March 2, 2014 at 2:31pm

physical science
a = (V-Vo)/t = (20-0)/15 = 1.33 m/s^2.
Saturday, March 1, 2014 at 8:10pm

physical Edu
A
Friday, February 28, 2014 at 8:40pm

(I need alot of help in) Physics
So in physics lab we did an experiment with a cart with two different masses on a air track (practically eliminating kinetic friction). The track was tilted at 4 degrees. Using 4 photo-gates I got the speed of both gliders and the height at each point. I made two graphs making...
Friday, February 28, 2014 at 5:35am

PHYSICAL SCIENCE
A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 179 lb person burn during 10 hours of sleep? (Note that 1 Cal = 1 kcal.)
Thursday, February 27, 2014 at 3:55pm

physical science
A motorcycle starts from a standstill. In 15 seconds it reaches a velocity of 20 m/s. What is the motorcycle's average acceleration?
Wednesday, February 26, 2014 at 9:17pm

Psychology
Johnny is naturally outgoing and does not provoke easily. As he is also athletically inclined, he tends toward reflective introspection regarding strategies for game improvement. These attributes refer to Johnny’s ___________________. a.) physical development b.) maturity...
Wednesday, February 26, 2014 at 8:22pm

Science
5. Water is water. H2O. Its state (ice, liquid, steam) is a physical property.
Wednesday, February 26, 2014 at 5:23pm

Science
1.   Which of the following is an example of matter?  (1 point) leaves shadows light from the sun sound 2.   Which of the following is an example of a chemical property of matter?  (1 point) ability to melt ability to freeze ability to ...
Wednesday, February 26, 2014 at 4:56pm

writing
how do i rewrite the paragraph using first person plural when referring to the readers, and third person plural nouns and pronouns in referring to those being judged. In the story, "The Valiant Woman" by J. J. Powers, we find that in judging people we overlook most ...
Wednesday, February 26, 2014 at 10:33am

Science help ms sue.
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Tuesday, February 25, 2014 at 6:14pm

Health
As mixed-doubles teammates in tennis, Kara and Tran are trying to devise their best strategy against an opponent that has two excellent servers but his physical fitness level is not as good as Kara and Trans. How can Kara and Tran use their superior cardiovascular endurance to...
Tuesday, February 25, 2014 at 9:21am

careers in mathematics and physical sciences
thank you!
Sunday, February 23, 2014 at 11:25pm

careers in mathematics and physical sciences
business
Sunday, February 23, 2014 at 10:54pm

careers in mathematics and physical sciences
information technology accounting
Sunday, February 23, 2014 at 10:36pm

careers in mathematics and physical sciences
medical and pharmaceutical careers
Sunday, February 23, 2014 at 10:34pm

careers in mathematics and physical sciences
wt can i study with maths and physical sciences and life sciences besides engeenering thngs ?please help
Sunday, February 23, 2014 at 10:32pm

physical since,pure maths,life science
i dont see answers they are jus questions, please be helpful
Sunday, February 23, 2014 at 1:49pm

physical since,pure maths,life science
Read through all the Related Questions below.
Sunday, February 23, 2014 at 8:09am

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