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September 30, 2014

Homework Help: Physical Education

Recent Physical Education Questions

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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
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 During the process, you observe that much of the inventory is outdated and there fore could not be sold for the recorded cost.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

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

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 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

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

(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
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

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
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
wt cn i become? except all de engineering thngs?plz help
Sunday, February 23, 2014 at 5:20am

Physical Science
What is the hiker's total displacement? part a of the hike: distance:4km east start time: 9:00 am end time: 9:45 am part b: distance:6 km south start time: 9:45 am end time: 10:45 am part c: distance:4 km west start time:10:45 am end time: 11:15 part d: distance 6 km north...
Thursday, February 20, 2014 at 1:23pm

Physical sciences
If you were in the middle of a frozen pond explain how will you get off the pond without making the use of any exernal help
Thursday, February 20, 2014 at 1:02pm

Honors Physical Science
An object is moving at 25 m/s and has a kinetic energy of 12,500 J. If the acceleration due to gravity on Mercury is about 3.8 m/s2 , what would be the weight of this object on Mercury?
Wednesday, February 19, 2014 at 5:16pm

Social Studies
Which statement best describes the physical geography of Arabia and Iraq? a. largely hot and dry with pockets of mountains and fertile river valleys b. tropical, with equal parts rainforest and desert. c. mountainous, with diverse terrain and climate based on altitude d. ...
Tuesday, February 18, 2014 at 12:48pm

Physical Science-Can someone check my answers?
1) The kinetic energy of an object depends on which of the following? A. the object’s mass and direction B. the object’s speed and mass---------- C. the object’s work and direction D. the object’s speed and work 2) In the following situations, which one ...
Tuesday, February 18, 2014 at 11:45am

Biology
Why do the physical characteristics of the overall population change? Why do some animals die and some thrive? In natural selections why do the animals die?
Monday, February 17, 2014 at 8:25pm

Biology help
Why do the physical characteristics of the overall population change? Why do some animals die and some thrive? In natural selections why do the animals die?
Monday, February 17, 2014 at 7:19pm

Physical Science
In what direction does heat flow? Why do particles of matter transfer thermal energy in this direction?
Monday, February 17, 2014 at 4:42pm

Physical Science
What form of energy provides power for a gas stove? That's Chemical Energy, right?
Monday, February 17, 2014 at 12:34pm

Physical Science
No system is completely closed off from its surroundings. Which represents a system that is almost completely closed? A. a capped soda bottle B. a wood-burning fireplace C. a washing machine D. a pot of boiling water I believe it is A.
Monday, February 17, 2014 at 11:09am

Physical Science
Which has characteristics similar to a scientific model? A. a toy train B. a deep-sea submersible C. a planetary rover D. the Brooklyn Bridge
Monday, February 17, 2014 at 10:55am

Physical Science
can I get some help with these questions. im not sure on these ones During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, a. both the intake and exhaust valves are open b. the intake valve is open ...
Sunday, February 16, 2014 at 11:00pm

physical science
the diameter of the planet saturn is 10 times that of the earth but the mass of the planet is only 90 times greater than that of the earth.what is the gravitational acceleration or number gs you will feel on saturn?(8.8m.s-2)
Sunday, February 16, 2014 at 12:27pm

physical science
calculate the weight of a man with a mass of 80.0kg on the surface of the moon 156N?
Sunday, February 16, 2014 at 12:18pm

Physical science
A box a weight of 100 N rests on a horizontal floor.The coefficient of static friction is 0,40 and the coefficient of kinetic friction is 0,30.DETERMISE THE FRICTIONAL FORCE ACTING ON THE BOX IF A HORIZONTAL FORCE IS APPLIED WITH A MAGNITUDE OF 0 N
Sunday, February 16, 2014 at 10:53am

physical
for a gaussin surface through which the net flux is zero the following 4 statements could be true which of the statements must be true a)tere are no charges inside the surface b)the net charge inside the surface is 0 c)the electric field is 0 everywhere on the surface d)the ...
Sunday, February 16, 2014 at 9:26am

physical
a 50 kg object moving at 12 m/s has a momentum of 600 kg times g m/s . what is the mass of an object moving at 4 m/s that has the same momentum?
Saturday, February 15, 2014 at 5:10pm

physical
what is the size and direction of the final velocity of the two cars when a 0.4 kg toy train car moving forward at 3 m/s collides with and sticks to a 0.8 kg toy car that is traveling the opposite direction of -2 m/s
Saturday, February 15, 2014 at 5:06pm

physical science
A frog jumps at the angle of 60 degrees to horizontal with initial velocity of 10.0m/s 1. calculate velocity Voy of the frog 2 calculate acceleration ax of the frog
Saturday, February 15, 2014 at 9:56am

physical science
A frog jumps at the angle of 60% to horizontal with initial velocity of 10.0m/s 1. calculate velocity Voy of the frog 2 calculate acceleration ax of the frog
Saturday, February 15, 2014 at 9:56am

physical sciences
a small brick mass 700 g is projected vertically downwards at a velocity of 1,25(m/s) from the top of a building of height 25m.calculate the magnitude of the velocity at which the brick hits the ground?
Saturday, February 15, 2014 at 4:44am

English Speech Paper (can some1 revise it)PLZ&TY
Gun Control I do not understand why people believe gun control actually works or why we need it. Guns, like other weapons, though more deadly and possibly more convenient to use, are still inanimate objects and are not the cause of violence or killings. Gun control is not ...
Friday, February 14, 2014 at 5:10pm

geography
1-20 can you please check my answers marked with *** which of the following were the main proponents of NAFTA? a. labor unions b. human rights groups c. environmentalists ***d. large corporations in the 1950s 40 percent of the u.s workforce was engaged in manufacturing by the ...
Friday, February 14, 2014 at 4:25pm

Ethics
1. Those things that we hold to be worthwhile and worth pursuing, such as freedom, happiness, and health, can be thought of as: A. virtues. B. values. C. vices. D. obligations. is it B 2. Which of the following would NOT be an example of a moral value? A. Happiness B. ...
Friday, February 14, 2014 at 2:25pm

Physical Science Need Help Quick PLEASE:)
A polo player hits a ball with a mass of 0.42 kg with a force of 7.35 Newtons. How does the force the polo player's mallet exerted on the ball compare to the force the ball exerted on the mallet? A. The force of the mallet on the ball is equal in magnitude and opposite in ...
Friday, February 14, 2014 at 12:17pm

Physical Science
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
Friday, February 14, 2014 at 11:35am

physical science
19. (2 points) Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the ...
Thursday, February 13, 2014 at 8:33pm

Physical Science
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
Thursday, February 13, 2014 at 12:10pm

Physical Education
I have to da a 10 page paper on Integration of health and physical education in curriculum. I need help finding 10 journal articles that are peer-reviewed, current trends and political background. Help please???
Wednesday, February 12, 2014 at 11:12pm

Chemistry
Explain how a person bailing out a row boat with a leak could represent a state of physical equilibrium.
Wednesday, February 12, 2014 at 9:06pm

physics
1 A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both ...
Wednesday, February 12, 2014 at 6:11am

physical science
what is the velocity of ironman if he travels up 2,000 meters in 8.6 seconds
Tuesday, February 11, 2014 at 2:57pm

physical science
Two force vector,a and b act on an object in the x direction and b acts on a y direction. Use words and diagram to explain how you can find the resultant force acting on the object by using the tail-to-head method
Tuesday, February 11, 2014 at 1:25pm

Physical Chemistry
If 20.0mL of 0.122M NaOH are required to reach the first equivalent point of a solution of citric acid(tripotic acid H3C6H5O7).How many mL of NaOH in total are required to reach the second equivalence point?
Monday, February 10, 2014 at 4:07am

physics
passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the passenger Both observers ...
Sunday, February 9, 2014 at 7:09pm

physical science
A horizontal force of 100 N is required to push a box across the floor at a constant velocity. a) Show that the net force acting on the box is zero. b) Show that the friction force that acts on the box is 100 N.
Sunday, February 9, 2014 at 5:21pm

physical science
Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.
Sunday, February 9, 2014 at 5:20pm

physical science
If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.
Sunday, February 9, 2014 at 5:16pm

physical science
what do you think about the kind of charge on the plastic straw
Friday, February 7, 2014 at 12:17pm

Research Project: Anatomy & Physiology 1
Could someone read this paper and tells me if this is good or do I need to change some stuff: Introduction: ALS is distinguish by insistent collapse of both upper motor neurons (UMN) and lower motor neurons (LMN) leading to progressive muscular paralysis and death usually ...
Friday, February 7, 2014 at 10:29am

heailth
How can communities and government help promote physical activity initiatives? A. Create walking trails B. Eliminate sidewalks C. Lower taxes D. Raise taxes
Friday, February 7, 2014 at 2:25am

chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Wednesday, February 5, 2014 at 12:15am

chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Wednesday, February 5, 2014 at 12:15am

chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Wednesday, February 5, 2014 at 12:15am

chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Wednesday, February 5, 2014 at 12:15am

chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Wednesday, February 5, 2014 at 12:15am

Chemistry
I did a lab the other day where we separated a mixture of NaCl, SiO2, and CaCO3. The Mixture was made by my professor and we did not know the original amounts of each compound. After recovering all of the compounds we found that there was.. 36.4% NaCl 36.4% SiO2 40.9% CaCO3 ...
Tuesday, February 4, 2014 at 8:39pm

physical science
Explain using newtons first law why traveling car using a rope is dangerous compared using a steel car
Monday, February 3, 2014 at 11:00pm

Physical
A 0.140-kg baseball traveling 38.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 15.0cm .What was the average force applied by the ball on the glove?
Monday, February 3, 2014 at 9:55pm

chemistry
What physical properties of calcium chloride, citric acid, sodium iodide, potassium iodide, and sucrose have in common?
Monday, February 3, 2014 at 8:41pm

Physical sciences
Two girls drag a bag across the floor one girl exerted a force of 10N and the other girl a force of 30N in the same direction:CALCULATE THE RESULTANT FORCE ON A BAG
Monday, February 3, 2014 at 2:41pm

Physical sciences(Mechanics)
A tractor pulls a tree trunk across a horizontal piece of ground.If the force in the chain is 3000N and the chain forms an agle of 30 degrees with the ground,calculate:The forces with which the tree is pulled across the ground.
Monday, February 3, 2014 at 1:11pm

Statistics
As part of studying the relationship between mental and physical health, you obtain the following heart rates: 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 In terms of differences in heart rates, interpret these data using the following: (a) the range, (b) the variance, ...
Sunday, February 2, 2014 at 10:31pm

Physical Science
Explain the energy conversions that occur as a basketball falls, hits the ground, and bounces back up. Ignore frictional forces.
Sunday, February 2, 2014 at 6:02pm

Statistics
As part of studying the relationship between mental and physical health, you obtain the following heart rates: 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78
Sunday, February 2, 2014 at 3:02pm

physical science
a weigh lifter raises a 70-kg barbell from the floor to a height of 2.2 m in 1.2s what was his average power output during the lift?
Saturday, February 1, 2014 at 5:54pm

reading
why is the book "the stranger" by albert camus considered a classic? is it morality, effective language, truthfulness, universality, timelessness here a bit about this: Meursault learns of his mother's death. At her funeral, he expresses none of the expected ...
Saturday, February 1, 2014 at 3:23pm

English
I am writing a paper for my research class and I am not sure I am using the right word in the sentence below. (This can include mental, physical, and emotional abuse that any member of a family conflicts on to another member of the family.) I am not sure that “conflicts&#...
Thursday, January 30, 2014 at 3:37pm

physical science
A rock thrown straight up climbs for 4.24 s, then falls to the ground. Neglecting air resistance, with what velocity did the rock strike the ground?
Thursday, January 30, 2014 at 2:12pm

science --- check my answers!
help pls asap!!!!! check my answers!!! 4.) A certain object has a volume of 25.0 mL and a mass of 100g. What is the density of the object? a)0.250 g/mL b) 4.00/mL*** c)125 g/mL d) 2500 g/mL 5.)Which of the following is a chemical property of aluminum? a)The melting point of ...
Thursday, January 30, 2014 at 1:22pm

Physical Education - Check my answer please
Excess body fat may cause... Answer choices: 1. diabetes, lack of stored energy, stroke, and heart disease. 2. lack of organ protection, osteoarthritis, and hyper tension. 3. sleep apnea, lack of organ protection, and liver disease. 4. stroke, infertility, sleep apnea, and ...
Thursday, January 30, 2014 at 12:17pm

Physics
Problem 1 (80 points) Consider a spring of equilibrium length L, lying horizontally in a frictionless trough. The spring has cross sectional area S perpendicular to its length. The trough constrains the motion of the spring so that any wave propagating along the spring is a ...
Wednesday, January 29, 2014 at 11:24pm

physical science
How much time is needed for a car to accelerate from 8.0 m/s to speed of 22 m/s if the acceleration is 3.0 m/s^2?
Wednesday, January 29, 2014 at 8:54pm

Physical Science
How does the potential energy of an object change when its height is tripled?
Wednesday, January 29, 2014 at 6:20pm

Physics
Problem 1 (80 points) Consider a spring of equilibrium length L, lying horizontally in a frictionless trough. The spring has cross sectional area S perpendicular to its length. The trough constrains the motion of the spring so that any wave propagating along the spring is a ...
Wednesday, January 29, 2014 at 3:50pm

Science
1. Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. ***Mixtures have two or more substances mixed together, but ...
Wednesday, January 29, 2014 at 11:18am

Science ~ Structures and Properties of Matter
1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by physical means. C. both ...
Tuesday, January 28, 2014 at 4:12pm

science ~CHECK MY WORK PLEASE~
1) Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means. B. both substances have a set ratio of atoms that can be separated by physical means. C. both ...
Tuesday, January 28, 2014 at 3:41pm

Science ~CHECK MY WORK PLEASE~
Both carbon dioxide and water are pure substances. How are they similar to each other? A.) both substances have a set ratio of atoms that cannot be separated by physical means. B.) both substances have a set ratio of atoms that can be separated by physical means. C.) both ...
Tuesday, January 28, 2014 at 3:21pm

Physical Science
A machine you designed has an efficiency of 60%. What happens to 60% of the work put into the machine, and what happens to the other 40%?
Tuesday, January 28, 2014 at 2:55pm

Physical science
State the mathematical relationship between the net force acting on an object and the time taken to change the objects momentum
Tuesday, January 28, 2014 at 12:55pm

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 ...
Tuesday, January 28, 2014 at 12:41am

Ms.Sue is this better?
In the article The String Theory, by David Foster Wallace, there were three writing techniques that I noticed Wallace used. First, I think Wallace was informative and explanatory. He explained why there are some professional tennis players who are unknown and obscure to the ...
Monday, January 27, 2014 at 5:48pm

Analysis proofreading
Hi for my analysis on The String Theory by David Wallace Foster I had to discuss 3 writing techniques the author used and give an example. Can I please get it proofread? After reading the article The String Theory, by David Foster Wallace, there were three writing techniques ...
Monday, January 27, 2014 at 4:23pm

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