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October 20, 2014

Homework Help: Physical Education

Recent Physical Education Questions

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physical scince
suppose that one of your test has a capacity of 23ml. you need about 5ml of liquid.describe how you could estimate 5ml.
Sunday, August 21, 2011 at 1:16pm

physical science
If cathode ray is attracted towards north pole of magnet, then do negatively charged ebonite rod get attracted towards north pole?
Sunday, August 21, 2011 at 6:41am

physical science
A magnet is plunged into and out of a coil of wire 2 times per second. This induces 5 volts. If the number of coils in the wire is doubled from 100 to 200, and the original rate 2 times per second is kept the same, what will be the new voltage induced.
Friday, August 19, 2011 at 2:48pm

physical science
the distance between two wave crests in the water is 3 meters. a swimmer notices one wave goes by every 6 seconds. What is the spped of the waves
Friday, August 19, 2011 at 2:47am

physical science
what is the freezing point depression when 153g of bromine is added to 1000g of benzene?
Thursday, August 18, 2011 at 9:08pm

physical science
what is the freezing point depression when 153g of bromide is added to 1000g of benzene?
Thursday, August 18, 2011 at 8:56pm

chemistry
Which best describes the physical change of an aluminum soda can after its crushed? A change in the mass of can B change in weight of can C change of volume of can D change in the specific heat of can
Thursday, August 18, 2011 at 1:28pm

english
You demonstrate that you are able to revise, edit, and proofread by effectively rewriting a paragraph using the standard written conventions of American English. To accomplish this assignment, you apply the rules and skills taught in the first four study units of this course. ...
Wednesday, August 17, 2011 at 1:01pm

physical science
alever is used to lift a heavy load. when a to-n force pushes one end of the lever down 1.2m the load rises 0.2m. show the weight of the load is 300n
Wednesday, August 17, 2011 at 12:59pm

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Wednesday, August 17, 2011 at 1:48am

physical science
economic impact of potical fibres
Tuesday, August 16, 2011 at 4:39am

Psychology
What is the realm of mind and consciousness? How does the realm of mind and consciousness relate to the physical body? Is there such a thing as an independent mind that transcends physical functions of the body through the central nervous system? Why or why not? Not asking for...
Sunday, August 14, 2011 at 11:30pm

Psychology
I need to find a peer reviewed paper on optimism on physical and psycological health. Can you help me find one that I do not have to pay for?
Sunday, August 14, 2011 at 5:41pm

Chemistry
Describe the physical and chemical changes that occur in grains during cooking.
Friday, August 12, 2011 at 11:10pm

physical
A ball rolling across a field with an acceleration of -0.5 m/s rolls 12.5 m and then comes to a stop after 8 seconds. What was the ball's initial speed?
Friday, August 12, 2011 at 10:09pm

physical
A runner moving at a velocity of 6 m/s increases the velocity in a 2 s time interval to a rate of 10 m/s. What is the rate of acceleration?
Friday, August 12, 2011 at 10:08pm

World History Honors
Hi! Can anyone help me with this assignment...? Using the primary source documents and information from your chapter, form a thesis that describes why Herodotus referred to Egypt the way he did (Why he referred to Egypt as the “gift of the Nile.”) Then, write a 550-...
Friday, August 12, 2011 at 7:55pm

Physical science
Which of the following star colors has the highest temperature?
Thursday, August 11, 2011 at 11:14pm

physical science 101
A person dives off the edge of a cliff 40m above the surface of the sea below. Assuming that air resistance is negligible, (a) How long does it dive last? (b) and with what speed does the person enter the water?
Thursday, August 11, 2011 at 10:02am

physical science 101
A bullet is fired horizontally from a rifle at 300m/s from a cliff above a plain below. The bullter reaches the plain 6s later. (a) How high was the cliff? (b) How far from the cliff did the bullet reach the plain? (c) What was the bullet's speed when it reached the plain?
Thursday, August 11, 2011 at 10:00am

physical science 101
A box of mass 7.0kg is accelerated from resr across a floor at a rate of 4.0m/s2 for 5.0s. Find the net work done on the box.
Thursday, August 11, 2011 at 9:58am

physical science 101
How long will it take a 1000kg cat=r with a power output of 30,000W to go from rest to 20m/s?
Thursday, August 11, 2011 at 9:57am

social studies
what are 2 physical and human features of tokyo?
Tuesday, August 9, 2011 at 6:01pm

Epidemiology
Identify the study design best described by the scenarios or research questions presented below. Provide a two-sentence rationale for your answer. Choose from: • Ecologic • Cross-sectional • Case-control • Retrospective (Historical) Cohort • ...
Monday, August 8, 2011 at 9:39pm

Physical chemistry
Ag(s) + Cl2(g) --> 2AgCl(s) ∆H and ∆S are 254.14kJ and –115.0J/K respectively. Calculate equilibrium constant, K for the reaction at 500K?
Monday, August 8, 2011 at 6:45am

Physical Chemistry
1.6 mol of Neon gas are heated from 20.0 °C to 85.2 °C at a constant pressure of 1 atm. Calculate the work done. (R = 0.082057 L.atm/ K. mol)
Monday, August 8, 2011 at 2:14am

physical science
A 4.0 -m ladder leans against a vertical wall and makes an angle with the horizontal ground of 52degrees. What is the height above the ground where the ladder makes contact with the wall?
Wednesday, August 3, 2011 at 3:57pm

Science
TRUE or FALSE? when ice cubes melt into liquid water, its physical properties changes
Wednesday, August 3, 2011 at 9:50am

physical science
nitrogen and hydrogen react to form ammonia as follows N2(g)+3H2(g) -2NH3(g)
Tuesday, August 2, 2011 at 12:01pm

Physical Science
why does the maximum initial reaction rate cannot be reached at low substrate concentrations.
Monday, August 1, 2011 at 8:17pm

Physics
Pretend our future colonists build a large round 2km diameter train track on the great plains of Mars that is sloped (angled) inward to artificially increase the gravity felt by the occupants living onboard the house sized train cars speeding along at the rails a constant ...
Sunday, July 31, 2011 at 10:15pm

Physical Science
Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the importance of temperature-regulating mechanisms in organisms? ...
Sunday, July 31, 2011 at 2:32pm

Early Childhood Psychology
Can someone please let me know if I chosen the right answers for my six questions below? If I did not choose the right answers could you please let me know which answer is the correct one? Thanks 1) In Piaget's theory, a symbol is closest to a(n) = Physical object. (B) A) ...
Friday, July 29, 2011 at 2:37pm

Clinical Procedures
When assisting a young child in preparation for a physical examination,you should A. leave the room while he or she undresses B. keep the child in plain view to ensure patient's safety C. ask the child to stand in the hallway while you prepare the examing room D. have the ...
Thursday, July 28, 2011 at 1:40pm

inforrmation tech/marketing
hi i just made this paper about information technology on business and marketing, im not really good at it so please check my work and maybe revise alittle thanks so much :) need it later hehe :D thanks As industry and commerce have increased their use of modern technology ...
Tuesday, July 26, 2011 at 1:39am

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Friday, July 22, 2011 at 1:04am

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Friday, July 22, 2011 at 1:04am

Physical science
A car moving at 50km/hr skids 15m with locked brakes. How far will the car skid (with locked brakes if the car moves at 100km/hr assume that the mass of the car is 500kg
Wednesday, July 20, 2011 at 4:01pm

Chem
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 – Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed...
Wednesday, July 20, 2011 at 1:52pm

physical science
im sorry but im notiing others are gettin help before me with math, algebra, and i honestly think its being done on purpose..just because i keep asking.im justy worried about my test that is coming up..i honestly need help
Tuesday, July 19, 2011 at 6:29pm

physical science
I need help on a problem that i asked about 3 hrs ago..please help!!
Tuesday, July 19, 2011 at 4:29pm

Statics
Total plasma volume is important in determining the required plasma component in blood replacement therapy for a person undergoing surgery. Plasma volume is influenced by the overall health and physical activity of an individual. Suppose that a random sample of 44 male ...
Tuesday, July 19, 2011 at 3:03pm

physics
A physical science student adds 500g of 0 degree C ice to 500g of 80 degree C coffee. What is the final temperature of the drink after thermal equilibrium is reached? How much of the ice was melted by the process? Assume coffee has same specific heat as water.
Sunday, July 17, 2011 at 5:17pm

physical science
If the earth had twice its present radius and twice its present mass, what would happen to your weight? Explain. What is the relationship between the radius (R) of orbit of a satellite and its period (T)?
Thursday, July 14, 2011 at 11:00pm

PHYSICAL SCIECE
A seismic wave has a velocity of 5000 m/s and a frequency of 4Hz. wht is the wavelength of this wave? if this was a light wave traveling in a vacuum with the same wavelength, what would be its period?
Thursday, July 14, 2011 at 9:14pm

physical science
During a rain storm, rain comes straight down with a velocity -15 m/s and hits the roof of a car perpendicularly. The mass of the rain per second that strikes the roof is .060 kg every second. Assuming that the rain cones to rest upon stiking the car (Vf =0m/s), fund the ...
Thursday, July 14, 2011 at 7:32pm

Critical Thinking
6. According to Nature, today’s thoroughbred racehorses do not run any faster than their grandparents did. But human Olympic runners are at least 20 percent faster than their counterparts of fifty years ago. Most likely, racehorses have reached their physical limits but ...
Tuesday, July 12, 2011 at 6:25pm

Med terms
I am having troubles finding all 10 mistakes and need some help. Inpatient Progress Report Attending Physician: Moreover, Cindy Patient: Stephen R. Peters DOT: 03/01/19XX CHIEF COMPLAINT: This 53-year-old man visited the outpatient clinic for dyspnea and recurrent coughing. ...
Tuesday, July 12, 2011 at 2:17pm

World History
1. Among early hunting and gathering peoples, the commonly occurring mark that looks like a "P" is thought to stand for a A. favored animal B. woman. C. powerful male leader. (my answer) D. symbol for a calendar. 2. Charles Darwin supported the theory that ...
Sunday, July 10, 2011 at 1:29pm

Statistics
foofy computes the correlation between an individual's physical strength and his or her college grade poing average. Using a computer, the correlation for a sample of 2000 people is r(1998)=+.08, p=<.0001. she claims this is a useful tool for predicting which college ...
Sunday, July 10, 2011 at 9:58am

Medical
Write a medical report describing the history, symptoms, and physical examination findings of a patient with pancreatitis. Make sure to include the following terms in your report. Acute Chronic Gallstones Furosemide Azathioprine CT Scan Stethoscope Amylase Lipase Prognosis ...
Saturday, July 9, 2011 at 7:32pm

physical science
the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.
Friday, July 8, 2011 at 4:07pm

physical science
The speed of light is 3 „e 108 m/s (300,000,000 m/s). Red light has a wavelength of 7 „e 10-7 m (0.0000007 m). What is its frequency?
Friday, July 8, 2011 at 12:29am

physical science
whats the speed of sound in air at 30 degrees Celsius.
Thursday, July 7, 2011 at 11:37pm

English
Could you please check these few other sentences? Thank you. 1) Can you refer to the most prominent episodes of the Second World War? 2) In what historical context did we mention the intervention of the Royal Force? Who was the Battle of England won by? 3)The eye is a ...
Wednesday, July 6, 2011 at 5:59pm

English
Could you please check these other sentences on the same theme? Thank you. I tried to revise the punctuation myself. 1) A Jewish council was established to regulate the internal life of the ghetto. 2) Jews were regularly sent to either a concentration camp or a death camp. 3) ...
Wednesday, July 6, 2011 at 4:07pm

English
I forgot to include the following statements. Thank you for your help. 1)A Jewish council was established to regulate the internal life of the ghetto. 2)Jews were regularly sent to either a concentration camp or a death camp. After Kristallnacht the number of Jews sent (...
Wednesday, July 6, 2011 at 1:31pm

English
Could you please check these statements, please? Thank you very much. 1) When the monster comes to life, Victor is horrified by the monster's physical appearance. 2)His pearly white teeth and shiny black hair contrast with his dull, yellow eyes, shrivelled complexion and ...
Wednesday, July 6, 2011 at 10:45am

physical
At what angle is an object launched if its initial vertical speed is 3.75 m/s and its initial horizontal speed is 4.50 m/s?
Wednesday, July 6, 2011 at 3:22am

physical science
How much heat must be added to 1.0kg of steam at 100 degrees Celsius to convert it to steam at 110 degrees Celsius? How much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius?
Tuesday, July 5, 2011 at 11:03pm

physical science
For each pair of substances, which of the substance with more thermal energy and explain why. a.500 g of water at 35„aC vs. 500 g of water at 85„aC b.500 g of water at 35„aC vs. 250 g of water at 35„aC I dont know how to determine the answer
Tuesday, July 5, 2011 at 10:30pm

hsm210
Scenario 3: Caring for the HomelessYou are a case manager in a community mental health center. Many of your clients are homeless and have either mental disorders or substance abuse and health problems. Health problems among the homeless are exacerbated by their homeless status...
Tuesday, July 5, 2011 at 9:10pm

chemistry
Predict whether reactions should occur between aqueous solutions of the following compounds. If so, write balanced molecular and net ionic equations for the reactions. Include physical states. a. (NH4)2CO3 and CrCl3 b. Ba(OH)2 and HCl c. FeCl3 and NaOH d. Ca(HCO3)2 and HNO3
Sunday, July 3, 2011 at 1:33pm

chemistry
Consider the following equations. For each, decide whether it represents a chemical reaction or a physical change. a. SnCl4(aq) + 4H2O(l)  Sn(OH)4(s) + 4HCl(aq) b. 4K(s) + O2(g)  2K2O(s) c. NaCl(s)  Na+(aq) + Cl-(aq)
Sunday, July 3, 2011 at 1:31pm

physics..
A physical quantity 'x'is calculated from the relation x=a^3b^2/root of cd. Calculate percentage error in x, if a, b, c and d are measured respectively with an error of 1%,3%,4% and 2%
Friday, July 1, 2011 at 8:56am

physical science
A football player picks up.the football runs with it and throws it to a teammate, during which of these actions is work being done on the football?
Thursday, June 30, 2011 at 9:05pm

physical science
the speed of light is 3*10^8 m/s. Red light has a wavelength of 7 * 10^-7 m. What is its frequency?
Thursday, June 30, 2011 at 2:33pm

physics..
A physical quantity 'x'is calculated from the relation x=a^3b^2/ãcd. Calculate percentage error in x, if a, b, c and d are measured respectively with an error of 1%,3%,4% and 2%.
Thursday, June 30, 2011 at 4:05am

physical science
A object that has a mass of .25kg is moving with a momentum of 5 kg„ªm/s. What is its velocity?
Tuesday, June 28, 2011 at 11:50pm

physical science
A marble is rolling at a velocity of 1.5 m/s with a momentum of 0.10 kg m/s. What is its mass?
Tuesday, June 28, 2011 at 11:48pm

physical science
A steel ball whose mass is 2.0 kg is rolling at a rate of 2.8 m/s. What is its momentum?
Tuesday, June 28, 2011 at 11:47pm

physical science
When you are driving a golf ball, a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball farther?
Tuesday, June 28, 2011 at 11:30pm

physical science
When you are driving a golf ball, a good follow-through helps to increase the distance of the drive. A good follow-through means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball farther?
Tuesday, June 28, 2011 at 11:30pm

physical science
how much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius? i know that normally when the temperatures are the same, the heat added is zero, but i think that in this case i need to do something different.
Tuesday, June 28, 2011 at 2:34pm

physical science
There are two set pieces in a theater sitting on platforms with wheels. One is a tree with a mass of 50 kg. It is moving at 3 m/s. The other is a fence with a mass of 30 kg. If the two set pieces have equal momentum, how fast is the fence moving
Tuesday, June 28, 2011 at 11:00am

physics pls help
A sound source producing 1.00-{\rm kHz} waves moves toward a stationary listener atone-half the speed of sound. The frequency that the listener will hear is2000 Hz. when the source is stationary and the listener moves towardthe source at one-half the speed of sound, the ...
Tuesday, June 28, 2011 at 9:43am

Chemistry
Write a balanced net ionic equation (include physical states) for the following reaction: Fe(NO3)3(aq) + LiOH(aq) → LiNO3(aq) + Fe(OH)3(s)
Monday, June 27, 2011 at 10:14am

Chemistry
If a solution of sodium phosphate, Na3PO4, is poured into seawater, precipitates of calcium phosphate and magnesium phosphate are formed. (Magnesium and calcium ions are among the principle ions found in seawater.) Write net ionic reactions for the reactions. Include physical ...
Monday, June 27, 2011 at 10:13am

Chemistry
Write equations for the dissociation of the following in water. Include physical states for all species. CaCl2 (NH4)2SO4 NaC2H3O2
Monday, June 27, 2011 at 10:13am

physical science
A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration. 5280 ft/sec2 528 ft/sec2 100 ft/sec2 100. ft/sec2
Monday, June 27, 2011 at 6:59am

physical science
A rock tied to a string is swung around in a circle at a constant speed of 25 ft/sec. The length of the string is 1.765 ft. Calculate the acceleration. = _____ . 354.1 ft/sec2 350 ft/sec2 14.16 ft/sec2 14 ft/sec2
Monday, June 27, 2011 at 6:59am

physical science
A weight attached to a wire is swung in a circular path. Its speed is 12 meters/sec, and it has a centripetal acceleration of 9.0 meters/sec2. Calculate the diameter of the circle. 1.3 meters 2.6 meters 16 meters 32 meters
Monday, June 27, 2011 at 6:58am

physical science
While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration. = -2.5-6.0-150-450 mi./hr2 NSWEn/a
Monday, June 27, 2011 at 6:57am

physical science
If a car goes along a straight road heading east and speeds up from 45 ft/sec to 60. ft/sec in 5 sec, calculate the acceleration. = Note: If the speed were given in miles per hour, and the time were given in minutes, you could change the minutes to a fraction of an hour and do...
Monday, June 27, 2011 at 6:56am

physical science
If a car goes along a straight road heading east and speeds up from 45 ft/sec to 60. ft/sec in 5 sec, calculate the acceleration. = 3-3 ft/sec 2 NESn/aW Note: If the speed were given in miles per hour, and the time were given in minutes, you could change the minutes to a ...
Monday, June 27, 2011 at 6:55am

physical science
A rock tied to a string is swung around in a circle with a radius of 10 ft. The centripetal acceleration is 16.9 ft/sec2. Calculate the speed of the rock.
Monday, June 27, 2011 at 6:54am

physical science
A car slams on its brakes, coming to a complete stop in 4.0 sec. The car was traveling north at 60.0 mph. Calculate the acceleration.
Monday, June 27, 2011 at 6:54am

physical science
A car goes around a curve (the arc is part of a circle with a radius of 25 ft.) with a speed of 20.0 ft/sec. What is the magnitude of acceleration?
Monday, June 27, 2011 at 6:50am

Physical Science
the planet Jupiter is more than 300 as massive as earth. But a body would scarecly weighs 3 times as much on the surface of Jupiteras it would on the surface of the earth. Can you think of an explanation for why this is so?
Saturday, June 25, 2011 at 5:16pm

English
I just have a few more questions to you. As for 1) I just want to know if punctuation is correct and if distinguish is followed by "among" or not. In 3) I just want to know if "and" is needed. In 2) and 4) I'd like you to check the word choice. 1) The ...
Saturday, June 25, 2011 at 3:35pm

The Teacher Aide in Early Childhood Education Prog
Could you please help 2. One of the primary concerns of child advocacy groups is A. the need to provide more supervisory care for children. B. providing children with sports, games, and arts and crafts activities. C. the problem of low wages for early childhood educators. D. ...
Friday, June 24, 2011 at 9:34pm

Geography
It has been said that Eastern Europe is a political region more than a physical region. Would you agree or disagree with this statement? You must provide a solid argument for your position. Eastern Europe is tied together as a political region since the end of world war 2. ...
Friday, June 24, 2011 at 9:24pm

English
I need to simplify and clarify sentences number 1 and 3. Can you check the word choice (ex. impose) in the other sentences, too? 1)The Victorians were great moralizer: they faced a large number of problems on such a scale, that they felt obliged to so they promoted a code of ...
Friday, June 24, 2011 at 1:39pm

Physical Science
an initially stationary 15.0 kg crate of cheese wheels is pulled via a cable a distance d = 5.70 m up a frictionless ramp to a height of h = 2.5 m, where it stops. What is its potential energy of the crate after it is lifted? how much work is done during the lift? If it takes ...
Friday, June 24, 2011 at 11:27am

Physical Science
A 4.5 kg ham is thrown into a stationary 15 kg shopping cart. At what speed will the cart travel if the ham had an initial speed of 2.2 m/s ? If the ham hits the cart with 2N of force, how long did the collision between the two last? I know u use the formula v=p/m
Friday, June 24, 2011 at 11:22am

physical science
How long would it take a 20.0 hp motor to lift a 1,000.0 kg crate from the bottom of a freighter's hold to the deck (40.0 m)?
Thursday, June 23, 2011 at 2:19pm

physical science
a 4.5 kg ham is thrown into a stationary 15 kg buggy. at what speed will the cart travel if the ham had an initial speed of 2.2 m/s ? if the ham hits the buggy with 2N of force how long did the collision between the two last?
Wednesday, June 22, 2011 at 5:50pm

physical science
A 6 kg bowling ball rolling at 5 m/s strikes a stationary 4 kg bowling ball. If ball #1 is moving forward at 2 m/s after the collision, what is the speed and direction of ball #2? What is the impulse of the system? If the collision last for .5 seconds, how much force is exerted?
Wednesday, June 22, 2011 at 4:48pm

physical science
Suppose you are playing ice hockey in the middle of a totally frictionless frozen pond. How can you move yourself to the edge of the pond? Explain what you would do and why it would work.
Wednesday, June 22, 2011 at 4:45pm

Physical Science
A dog having a mass of 32.0 kg runs at a constant pace of 9.50 km/hr. What is the magnitude of the dog's momentum?
Wednesday, June 22, 2011 at 2:50pm

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