Describe the flow of blood in the human body, including through each four chambers of the heart.Explain how the blood changes as it moves through various locations of the body
Tuesday, February 9, 2016 by Paige
Name the type of lens required to obtain 3tymes magnified img of a candle flame on a wall. The candle flame is 6m away from the wall calculate the focal length..???
Tuesday, February 9, 2016 by aishwarya
maths lit,life science,tourism,history,life orient
Should I become a maternity nurse?
Tuesday, February 9, 2016 by akhona
The acceleration of gravity on the moon is 1.62 m/s2. If a ball is dropped on the moon from a height of 1.50 m. Determine the time for the ball to fall to the surface of the moon.
Monday, February 8, 2016 by Nic Balasuela
science help PLS
The light from one end of the Milky Way galaxy takes about 150,000 years to travel to the other end. Which of these statements is correct about the Milky Way galaxy? A: The distance between the two ends of the galaxy is 150,000 light years. B: It would take 150,000 years to ...
Monday, February 8, 2016 by Oscar
science help PLS
Scientists earlier believed that the lowest measurable temperature is the freezing point of ice. However, modern scientists believe that temperatures below the freezing point of ice can also exist. What best accounts for these different opinions? scientists propose ...
Monday, February 8, 2016 by Oscar
science help PLS
Two scientists did the same experiment but arrived at different results. The scientists most likely did not have accurate data and information misunderstand each other's interpretations belong to different backgrounds did not have instruments to take accurate measurements ...
Monday, February 8, 2016 by Oscar
Geography and Society
What is cartography? a. the study of maps b. the science of creating maps*** c. the science of creating scale for maps d. the study of scale maps
Monday, February 8, 2016 by Kaai97
Which is a correct statement about the excretory system? A: Key organs of the system include bladder, intestines, and kidneys B: It is similar to the digestive system and that they both rid the body of waste*** C: It rids the body of food that the body did not absorb D: The ...
Monday, February 8, 2016 by LadyPhantomhive
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can ...
Monday, February 8, 2016 by Mettaton ex
The following chart shows the Baffin Bay high and low tide heights for four consecutive days. Describe the changes in the heights of the high and low tides from Monday morning to Thursday night.
Monday, February 8, 2016 by Janet
The following forces act on a body:F1=5,3Nupwards.F2=2,2N upwards and F3=10,7 N downwards.Determine the resultant of the three forces using a sketch of head to tail vector diagram and check your answer with equation :FR=F1+F2+F3
Monday, February 8, 2016 by jimmy
Maths lit,geography,physical science and life science
Wich career should i follow
Monday, February 8, 2016 by Archie guma
Imagine a Rip van Winkle type who lives in the mountains. Just before going to sleep, he yells, "WAKE UP", and the sound echoes off the nearest mountain and returns 7.6 hours later. Find the distance between Rip and the imaginary mountain. I have this equation s= v(...
Sunday, February 7, 2016 by sarah
Dan wants to lift his car using a movable pulley system like the one shown in the picture. Using a movable pulley system will decrease the force needed to lift the car by increasing the A. total mass of Dan's body. B. strength contained in Dan's arms. C. total mass of...
Sunday, February 7, 2016 by Lakshmi
Science Please Help
Human activities, like burning fossil fuels and deforestation, have greatly contributed to global warming. In this assignment, you will go on a trip around the world to explore the effects of climate change. Choose one destination that is represented by a flag. Write a ...
Sunday, February 7, 2016 by Bradley
A stone from a window with an initial horizontal velocity of 10m/s. If the window is 20m high, and the ground is level, how many seconds will the stone reach the ground? How far on the ground will it reach?
Sunday, February 7, 2016 by nova
A person stands between two cliffs and fires a gun.he hears two successive echoes in 2 seconds and 5 seconds after the gun was fired. Find the distance between the two cliffs?
Sunday, February 7, 2016 by lovepreet singh sidhu
Determine the magnitude and direction of a resultant force on 500N,200N and 300N by calculating or by accurate construction and measurement use scale 10mm=50N
Saturday, February 6, 2016 by mongi
Hydrogen peroxide can be prepared in several ways. One method is the reaction between hydrogen and oxygen, another method is the reaction between water and oxygen. Calculate the ΔG°rxn of each reaction below? 1) H2(g) + O2(g) <==> H2O2(l) ΔG°rxn=? (in ...
Friday, February 5, 2016 by Dan
2._____ clouds form at heights of 2,000 meters or less. A.Cumulus B.Cirrus C.Cirrostratus D.Altocumulus Erosion caused by waves can destroy ____. A.Rocky shorelines B.Sandy shorelines C.Beaches D.All of the above The horizontal distance between the highest or the lowest points...
Friday, February 5, 2016 by Debbie
Which of the following activities would contribute the most to global warming? -driving a solar-powered car -snowmobiling around a national park(i picked) -launching an engineless glider -trekking by horseback
Friday, February 5, 2016 by ???
which of the following is a consequence of using fossil fuels as an energy source decreased carbon dioxide levels increased biodiversity increased acid rain decreased ecosystem disruption
Friday, February 5, 2016 by kyran
Science: Drifting Continents
Sandstone is a sedimentary rock. Which of the following characteristics would you look for in a piece of sandstone? A) Rock has sparkly or alternating color layers that are bent or folded B) Rock has layers and smaller pieces of rock in it. It also has fossil in it C) Rock has...
Friday, February 5, 2016 by TikiKiwi
A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover plants...
Thursday, February 4, 2016 by Jewels
Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other? a. The faster object has the same kinetic energy as the slower object. b. The faster object has less kinetic ...
Thursday, February 4, 2016 by shynice
science help PLS
An astronomer see a star that is very far away but still very bright. What can she conclude about the star? The star must be very large. The star must be very small. The star must be moving away from Earth. The star must be moving closer to Earth.
Thursday, February 4, 2016 by Oscar
In what way is geography an integrative science? a. Geography is an integrative science because it examines Earth in both physical and human terms.*** b. Geography is an integrative science because it borrows from physical sciences such as chemistry, biology, meterology, and ...
Thursday, February 4, 2016 by Kaai97
Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens. Please help this is my last question and it truly stumped! It'd mean the world if someone could explain this to me. ...
Thursday, February 4, 2016 by anon
His,math lit,geo,life science,l.o an other two language
Five ways the similarities and differences between nsfas and student loan
Thursday, February 4, 2016 by Trompies
calculate numerical value of current in inductor resistant circuit. l=1mH r=3k (ist=1ma at t=0) i1(t=1us)in ma. i0=1ma my work. i=i0(1-e^-(t/T)) 1*10^-3(1-e^(-1/0.33) i=0.952ma this is wrong do I need to add initial current to this(1ma). why is this wrong??
Thursday, February 4, 2016 by bearinthewoods
6. About 90% of all marine organisms live in the upper 180 m of the ocean. How does temperature and light intensity influence this fact? (What does temperature and light intensity have to do with where ocean life is located?)
Thursday, February 4, 2016 by Debbie
Which statement best explains why tropical climates are so hot. They receive little rain. They receive more direct sunlight than other regions. (MY ANSWER) They lack vegetation. There are more hours of sunlight in tropical areas than other regions.
Thursday, February 4, 2016 by LOVE
The dissociation constant of ethanoic acid (ch3cooh) at 298k is 1.8*10^-5 in a buffer solution the concentration of ch3coo and ch3cooh are 0.05m and 0.1m respectively what is the ph of the buffer solution
Thursday, February 4, 2016 by abiola
1. How does a mutation in the DNA affect the way proteins are made? A) a mutation in the DNA results in miss happen tRNA molecules ** B) a mutation in the DNA results in a chance in the mRNA, but it does affect the protein C) a mutation in the DNA affects the structure of mRNA...
Wednesday, February 3, 2016 by Anonymous
What is the magnitude of average force a pole vaulters exterts on a landing bag if it's 1.5 meters high and deforms by 0.5 M=60kg Height of the bar=4.5m His centre of mass is 1m
Wednesday, February 3, 2016 by Physics help on problem
The science club sold 24 T-shirts last week and 18 T-shirts this week. What is the percentage of decrease in the number of T-shirts sold? A: 33% B: 25% C: 50% D: 75% How do you do this?
Wednesday, February 3, 2016 by Grant
1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it d? 2. A plant continues to grow throughout its life through the use of s a process called... a. alternation of generations b. photosynthesis c...
Wednesday, February 3, 2016 by jjiiddss
1.Some people believe that certain drugs such as marijuana should be legalized. Do you agree or disagree? What impact might legalization have on forensic science as a field? for the first one I think that marijuana should not be legalized because people can mistreat the drug. ...
Wednesday, February 3, 2016 by anonymas
a car moves with a speed of 30km/h for 10 minutes and then 50km/h for 20 minutes.what will be the total distance covered by the car for 30 minutes?
Wednesday, February 3, 2016 by aastha
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, February 2, 2016 by EEE
Two forces of 5n and 12n respectively act on the same piun.Show how you would determine the magnitude of the resultant by using the tail to head and tail to tail method and Pythagoras theorem(13n)
Tuesday, February 2, 2016 by Lerato
1. A ___ has a definite shape and a definite volume. (1 point) solid liquid gas molecule 2. Why is a gas able to flow? (1 point) Its particles have melted and can move around. Its particles have high viscosity and can move around. Its particles have enough energy ...
Tuesday, February 2, 2016 by Vanessa
A boy is standing at the top of the a building, 40 m high. He leans over the side and throws a pebble vertically upwards from the edge of the building at 12m.s^-1. The pebble reaches the ground at the foot of the building. Calculate time for the pebble to reach the ground
Tuesday, February 2, 2016 by Itumeleng
1. what is the momentum of a 20.0 kg scooter traveling at 5.00 m/s? 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s 2. Which of the following describes the relationships between friction and inertia? when there is more friction, there is less inertia when there is less friction...
Tuesday, February 2, 2016 by Help Please
A force of 20N act an object angle of 30 to the inclined plane . The object move 8.0m up the unclined plane what is the workdone by the force plz draw.
Tuesday, February 2, 2016 by Ibn isah pd.
the active ingredient in the alergy medication claritin contain carbon,hydrogen,chloride,nitrogen,and oxygen its molecules formula is C22H23ClN2O2.the standard adult gosage utizies 1.572*10^19 molecules of the spicies determine the mass gosage of the active ingridient in the ...
Tuesday, February 2, 2016 by Kriatian ferrer
A flatt horizontal road is been designed for 60km/hr speed limit if the maximun acceleration of the car travelling on the road is to be 15m/s at the above speed limit.what is the minimun radius of the curvature of the curve on the road
Tuesday, February 2, 2016 by Paul
The equilibrium constant for the gas phase reaction N2O4 ⇀↽ 2 NO2 at a certain temperature is K = 0.0466. If the initial concentrations are [N2O4] = 1.0 M, [NO2] = 0.0 M, what are the final concentrations of [N2O4] and [NO2], respectively? 1. 1.0 M ; 0.22 M 2. 0.8 ...
Monday, February 1, 2016 by cora
How do you think a scientist might figure out a persons identity from bones? My answer I think that depending on the shape and size of the bones are different for every person like you DNA. This is how they know who you are. it is also possible that your bones carry DNA ...
Monday, February 1, 2016 by Anonymous
A body of mass 8kg moving with a velocity of 10m/s collides with another body of mass 6kg moving in the opposite direction with a velocity of 50m/s.determine their common velocity in the direction of A after collision
Monday, February 1, 2016 by Yunus
1. Calculate the theoretical density of Barium metal barium 2. Calculate the theoretical densities and packing factor of barium zirconate (BaZrO3), and barium cerate (BaCeO3), both of which form the perovskite structure
Monday, February 1, 2016 by MANFRED
A golfer on a level fairway hits a ball at an angle of 38° to the horizontal that travels 85 yd before striking the ground. He then hits another ball from the same spot with the same speed, but at a different angle. This ball also travels 85 yd. At what angle was the ...
Monday, February 1, 2016 by Brian
If exponential growth occurs in the population of a species of predator, the population of its prey will most likely decrease quickly. increase slowly. stay the same. experience exponential growth.
Monday, February 1, 2016 by sarah
a bullet is fired vertically upwards wth a initial velocity of 300m/s as it leaves the barrel.the rifle barrel is level with the ground and the rifleman stands in a trench.calculate the velocity of the bullet when it is 200m from ground level during the downward movement.
Monday, February 1, 2016 by nare
Plz correct me if I'm wrong!! 1) Which of the following is a chemical change? (1 point) Boiling of water Melting a cube of ice Dissolving 10 grams of salt in water Splitting water into hydrogen and oxygen*** 2) What is the mass of water that results from combining 2.0g of ...
Monday, February 1, 2016 by Vanessa