Tuesday
October 21, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

Post a New Question | Current Questions

English 9 - HELP!
1. The small boat was scudding into the open sea with a full sail. (1 point) getting stuck sinking deeply moving swiftly rocking harshly 2. As an outdoor enthusiast, Kristina abhorred the fact that people left debris along the hiking trail. (1 point) recently discovered ...
Tuesday, March 11, 2014 at 11:09pm

science(check answers)
1. A 2. C 3. A 4. D 1. Coal, oil, and natural gas are inexpensive sources of fuel which do not cause pollution when used. A. true B. false 2. One reason people around the world use coal as an energy source is: A. It is nonrenewable. B. it can be found many places C. it is a ...
Tuesday, March 11, 2014 at 10:44pm

physics
Find the speed of a satellite in a circular orbit around the earth with a radius 2.69 times the mean radius of the earth; Radius Earth= 6.37E+3km; Mass Earth= 5.98E+24kg.
Tuesday, March 11, 2014 at 7:51pm

physics
If Earth's mass were suddenly and magically reduced to half its present value, the Sun's gravitational force on Earth would A. be reduced by a factor of 2. B. be reduced by a factor of 4. C. increase by a factor of 2. D. remain the same. I was told it remained the same...
Tuesday, March 11, 2014 at 2:20pm

physics
A 600-kg geosynchronous satellite has an orbital radius of 6.6 Earth radii. What gravitational force does Earth exert on the satellite? A. 13.8 N B. 90.9 N C. 138 N D. 909 N
Tuesday, March 11, 2014 at 12:13pm

Science :(
Which of the following describes the correct sequence of events during the water cycle? precipitation → condensation → evaporation → runoff condensation → precipitation → runoff → evaporation runoff → condensation → evaporation...
Tuesday, March 11, 2014 at 10:44am

English
I'm writing a personal essay for an internship. Is everything in this essay clarified? Where can I expand? I don't know about you but I like living. And in order for me (and those who proceed me) to live a nice, long and happy life, we have to do something about the ...
Tuesday, March 11, 2014 at 3:52am

physics
astronomical observations of our milky way galaxy indicate that it has a mass about 8.0 *10^13 times the mass of our sun. a star orbiting on the galaxy edge is about 6.0*10^4 light years a way from the galactic center what is the orbital period of that star in earth year
Sunday, March 9, 2014 at 10:41pm

science
How does ozone gas to int get into the earth?
Sunday, March 9, 2014 at 3:21pm

science
A distant spaceship carrying a red headlight, emitting light with wavelength 600nm, is heading towards the earth. Observers on the earth detect the light from the headlight as ultraviolet light with wavelength 200nm. What is the velocity of the spaceship? b) As the space ship ...
Sunday, March 9, 2014 at 12:44pm

MATH
The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=-4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1 second. c) What is the ...
Saturday, March 8, 2014 at 1:40pm

science
why is gravity on earth and not on the moon i need something to help me start it off
Friday, March 7, 2014 at 12:48pm

physics
You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)
Friday, March 7, 2014 at 8:54am

Environmental Science
On Earth in the extreme northern and southern latitudes, how does the relationship between GPP and NPP change during an entire year’s time?
Thursday, March 6, 2014 at 7:43pm

chemistryyy
The escape velocity of planet earth is 11.2 km/s. At what temperature would helium atoms be able to escape the earth's gravitational pull? (Note: you're calculating the average speed here, which means roughly 50% of the atoms would escape at any given time)
Thursday, March 6, 2014 at 7:41pm

Reading skills
According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Thursday, March 6, 2014 at 2:37pm

trig
city a is 300 miles directly north of city b assuming the earth to be a sphere of radius 4000 miles determine the difference in latitude of the two cities make answers accurate to the nearest second
Wednesday, March 5, 2014 at 8:21pm

Physics
A satellite that is 4175 miles from the center of the earth, orbits with a period of 90 minutes. What is its centripetal acceleration?
Wednesday, March 5, 2014 at 7:32pm

Earth, Space and Science
8. A geologist is studying a section of sedimentary rock layers that have been newly exposed by a landslide. Based on what principle, the geologist would assume that the layers increased in age as they looked at them from top to bottom. A. unitarianism B. Principle of ...
Wednesday, March 5, 2014 at 12:11pm

physics
Two satellites are in circular orbits around the earth. The orbit for satellite A is at a height of 418 km above the earth’s surface, while that for satellite B is at a height of 731 km. Find the orbital speed for (a) satellite A and (b) satellite B.
Wednesday, March 5, 2014 at 8:39am

physics 1
A satellite is in a circular orbit about the earth (ME = 5.98 x 1024 kg). The period of the satellite is 1.77 x 104 s. What is the speed at which the satellite travels?
Wednesday, March 5, 2014 at 8:35am

Math help
The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three remaining ...
Tuesday, March 4, 2014 at 7:21pm

Math
The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three remaining ...
Tuesday, March 4, 2014 at 4:13pm

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

science
What universal force is primarily responsible for keeping satellite in orbit around earth? Answers are electromagnetic force, strong nuclear force, gravitational force, weak nuclear force. Thank you
Monday, March 3, 2014 at 7:50pm

Physics
A 6 kg brick is falling at a rate of 48.9 m/s toward the earth at a current height of 14 m. What is the total mechanical energy of the brick? (total mechanical energy= Eg+Ek+Eel) What is the answer in Joules?
Monday, March 3, 2014 at 6:33pm

Physics
A 6 kg brick is falling at a rate of 48.9 m/s toward the earth at a current height of 14 m. What is the total mechanical energy of the brick? (total mechanical energy= Eg+Ek+Eel) What is the answer in Joules?
Monday, March 3, 2014 at 6:12pm

physics
An astronaut in full gear has a weight of 2900 N on Earth. Jupiter; weight on planet relative to earth is 2.53 and weight of a 150-lb person is 380. How much will the astronaut weigh on the Jupiter? W_{Jupiter} =________________ N Neptune; weight on planet relative to earth ...
Monday, March 3, 2014 at 3:11pm

physics
A planet has a radius of about 0.85 times Earth's radius and a mass of only 0.74 times Earth's mass. Estimate the acceleration due to gravity on the planet. Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 kilometers a_{planet} = ________________{m}/{s^2...
Monday, March 3, 2014 at 3:03pm

physics
A 470-kg satellite experiences a gravitational force of 850 N. Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 kilometers What is the radius of the satellite�s orbit? r_{orbit} = _____________kilometers What is its altitude? altitude = ...
Monday, March 3, 2014 at 3:01pm

math
What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}
Monday, March 3, 2014 at 2:55pm

physics
What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}
Monday, March 3, 2014 at 2:54pm

physics 1
Two satellites are in circular orbits around the earth. The orbit for satellite A is at a height of 418 km above the earth’s surface, while that for satellite B is at a height of 731 km. Find the orbital speed for (a) satellite A and (b) satellite B.
Monday, March 3, 2014 at 3:43am

Chemistry
A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L
Sunday, March 2, 2014 at 11:43pm

Physics
What would our seasons be like if the rotation of the Earth's was aligned with the plane of the ecliptic so that the north pole pointed directly at the Sun once per year.
Saturday, March 1, 2014 at 6:43pm

physics
The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8m/s^2) W_{woman} =
Thursday, February 27, 2014 at 5:54pm

physics
The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =
Thursday, February 27, 2014 at 1:12pm

Maths
If a plane travels halfway round the world at an altitude of 11300m, what extra distance in km, will it fly compared with the distance measured at the surface of the Earth? The radius of the earth is approximately 6400km
Thursday, February 27, 2014 at 4:28am

Physics
A meteor has a speed of 90.0 m/s when 900 km above the Earth. It is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.19 m. (a) What is its speed before striking the sand? (b) How much work does the sand do to stop the ...
Wednesday, February 26, 2014 at 10:28pm

physics
The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =
Wednesday, February 26, 2014 at 6:41pm

English
Thesis: My favorite thing to do is listen to music. Transition-- Cool Closing Sentence: "Sing like no one is listening, dance like no one is watching, love like you'll never get hurt and live like it's heaven on Earth" I need help on my transition sentence. ...
Wednesday, February 26, 2014 at 5:37pm

Physics
Take into account the Earth's rotational speed (1 rev/day) and use 5 significant figures. (a) Determine the necessary speed, with respect to Earth, for a rocket to escape if fired from the Earth at the equator in a direction eastward. (The escape velocity from the surface ...
Wednesday, February 26, 2014 at 5:20pm

physics
An astronaut of mass 80 kg lands on a planet,the radius of which is half that of the earth and the mass of which is three times that of earth.what will be the force of attraction which this planet has on him?
Wednesday, February 26, 2014 at 2:19pm

SCIENCE
1. which of earth’s spheres contain most of its mass? A. atmosphere b. hydrosphere c. geosphere d. biosphere
Wednesday, February 26, 2014 at 2:13pm

Math
Why animals and plants are found on earth but are not on other planets of the solar system? Please ,,help me
Wednesday, February 26, 2014 at 12:11pm

physics
A rock is dropped off of a bridge into the water below. If the initial velocity was zero, and the well is on Earth (g = 9.8 m/s2), and you see the splash 4.59 seconds after the rock was dropped, how high was the bridge above the water? Give your answer in meters, to the ...
Wednesday, February 26, 2014 at 9:24am

astronomy
Your "weight" on Earth is a measure of the gravitational force between you and the Earth. What would your "weight" be on Mars? Mars has half the radius of Earth, and one-tenth the mass of Earth. Therefore your weight on Mars would be
Tuesday, February 25, 2014 at 7:50pm

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

Physics
If the gravitational force on you is 670N on the earth, how strong is the gravitational force on you on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0km ? Take the mass of the sun to be ms = 1.99×1030kg , the gravitational constant...
Tuesday, February 25, 2014 at 3:13pm

Physics
Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm. What is the size of ...
Tuesday, February 25, 2014 at 3:09pm

science
at what altitude the value of g becomes 3/4 of its value on the surface of earth ?
Tuesday, February 25, 2014 at 10:34am

physics
An accelerometer is a device that uses the extension of a spring to measure acceleration in terms of Earth's gravitational acceleration (g). What is the approximate acceleration if this accelerometer spring is extended just 0.43 centimeters?
Tuesday, February 25, 2014 at 10:02am

physics
the rotation of earth is a period of 86164 seconds. the earth has a radius of 6380 km. how fast would you be moving due to earths rotation at the equator? also how fast would you be moving at a latitude of 27 degrees north of the equator? also calculate the centripetal ...
Monday, February 24, 2014 at 10:19pm

physics
Explain why should torques, not forces, play essential roles in the following actions. (a) open or close a door (b) tighten or loosen a screw using a wrench c) "Give me a place to stand, and I shall move the Earth with it"
Monday, February 24, 2014 at 10:09pm

physics
At what altitude the value of g becomes 3/4 of its value on the surface of earth?
Monday, February 24, 2014 at 9:31pm

English
Choose.. 1/ Ali is ( old, older ,oldest than Hani. Answer: older 2/ the elephant is ( big, bigger, biggest) than the horse. Answer: bigger. 3/ Sam answered ( more , most, much carefully than his sister . Answer: more. 4/ Ann is the ( young , younger, youngest) one in our ...
Monday, February 24, 2014 at 7:21pm

Physics
A canoe has a velocity of 0.480m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity (V(C/R)) of the canoe relative to the river. Also, find the direction of the velocity of the ...
Sunday, February 23, 2014 at 12:29pm

Science
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...
Saturday, February 22, 2014 at 8:45pm

Science
How will precession of the Earth's rotation axis affect the month when the Sun will be in the current constellation in the future?
Saturday, February 22, 2014 at 6:29pm

chemistry
If a satellite orbits the earth at a velocity of 2.9 x 103 km/hr, this would be the same as how many in/sec?
Saturday, February 22, 2014 at 4:45pm

Physics
Suppose a straight 1.60mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B⃗ , which is horizontal, perpendicular to the wire, and of magnitude 4.2×10−5T . What current would ...
Saturday, February 22, 2014 at 11:26am

Physics
a. An object has a mass of 33 kg. The acceleration of gravity is 9.8 m/ s^2. What is its weight on the earth? Answer in units of N. 2. What is its mass on the moon where the force of gravity is 1/6 that of the earth? Answer in units of kg. 3. What is the weight of that object ...
Friday, February 21, 2014 at 8:01pm

phisecs
`filling the blanks: sun_________________ than moon. earth is__________________mercury.''.
Friday, February 21, 2014 at 1:09pm

Science
Read an article, and use the article to jump-start your thinking about designing your very own space mission. Think about what you want to explore in the solar system (and why!) and how you might get there. Click on the link below to read the Science NetLinks article “...
Thursday, February 20, 2014 at 5:09pm

physics
the distance from the earth to the sun is 1.5 times 10 to the 11 power m ( 93 million miles) and the time for one complete orbit of the earth about the sun is one year. how long would it take a planet located at twice this distance from the sun to complete one orbit?
Thursday, February 20, 2014 at 3:54pm

Math, anyone, plz help
Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 * 10^12 miles. Suppose a star is 1.23 * 10^2 light-years from Earth. In scientific notation, approximately how many miles is it? (1 point...
Thursday, February 20, 2014 at 2:49pm

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Thursday, February 20, 2014 at 2:07pm

Homework help plz( Steve or Reiny)
Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 * 10^12 miles. Suppose a star is 1.23 * 10^2 light-years from Earth. In scientific notation, approximately how many miles is it? (1 point...
Thursday, February 20, 2014 at 2:00pm

Astronomy
How can Google Earth be used to access the size of the Earth?
Thursday, February 20, 2014 at 1:58pm

Chemistry
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 7.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 8.40 ...
Wednesday, February 19, 2014 at 10:33pm

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Wednesday, February 19, 2014 at 8:58pm

PHYSICS
Sun..BLANK....than moon. earth iS..BLANK... mercury.
Wednesday, February 19, 2014 at 2:36pm

science
Which statement about supercell storms is false? A. A supercell storm can produce some of the most violent weather conditions on Earth. B. A supercell storm occurs only during the winter months. C. A supercell storm is characterized by rotating updrafts. D. A supercell storm ...
Wednesday, February 19, 2014 at 11:19am

Physics
Canadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 km/h. If one such bird is flying at 100 km/h relative to the air, but there is a 38.0km/h wind blowing from west to east. a) ...
Wednesday, February 19, 2014 at 2:14am

Physics
A canoe has a velocity of 0.410m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity v⃗ c/r of the canoe relative to the river
Wednesday, February 19, 2014 at 2:11am

science
in this place Friday comes before Thursday,fall comes before spring,and Mars is closer to the moon than earth?
Tuesday, February 18, 2014 at 9:53pm

Math
The formula for the velocity of an object is , where v is the velocity of the object, d is the distance traveled, and t is the time elapsed while that distance is traveled. v=d/t distance = speed times time so time in seconds = distance in meters / speed in meters/second we ...
Tuesday, February 18, 2014 at 4:28pm

Math
Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel from the Sun to Earth...
Tuesday, February 18, 2014 at 4:05pm

physic 1
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...
Tuesday, February 18, 2014 at 12:22pm

physics
we have learnt that Earth's gravitational field strength is 10 N/kg is the same as its acceleration due to free fall (10 m/s/s. even though their units are different, they are said to be dimentionally the same. prove that N/kg is the same as m/s/s
Tuesday, February 18, 2014 at 6:55am

Astronomy
How far will Venus be from Earth on February 19, 2014?
Monday, February 17, 2014 at 9:32pm

science
Which statement best describes Newton’s Law of Universal Gravitation? A.Large objects, like Earth and the Sun, attract other objects everywhere in the universe. B.Gravity is a kind of magnetic force between objects and Earth. C.Gravity is the result of the curvature of ...
Monday, February 17, 2014 at 8:35pm

phsics
A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
Monday, February 17, 2014 at 5:03pm

science
A person who weighs 600 newtons on Earth would weigh only 100 newtons on the Moon. Which statement best explains why? A.The circumference of Earth is larger than that of the Moon. B.The density of Earth is greater than that of the Moon. C.The mass of Earth is greater than that...
Monday, February 17, 2014 at 4:43pm

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Monday, February 17, 2014 at 2:26pm

physics
How far from Earth will Venus be today?
Sunday, February 16, 2014 at 2:14pm

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

maths
body of weight is inversely propotional to square of its distance from center of earth,radius of the earth is 6380 km, how much 80 kg man weigh 1600 km from the surface of earth
Sunday, February 16, 2014 at 4:47am

Physics
calculate the work required to launch a satellite from the surface of the earth (radius6380km) to orbit 6000 km above the surface
Sunday, February 16, 2014 at 4:46am

Physics
The radius of the moon is approximately one quarter of the earth's radius,and its mass is on eightieth of the earth's mass.Calculate the weight of a man with a mass of 80KG on the surface of the moon
Saturday, February 15, 2014 at 9:26pm

physics 1
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...
Thursday, February 13, 2014 at 10:50pm

english part 1
Which of the following best expresses the writer's main idea in “Single Room, Earth View”? A. Space exploration leads to human progress. B. Space travel offers a unique view of Earth. C. Astronauts are highly trained scientists. D. Pollution is endangering Earth.
Thursday, February 13, 2014 at 7:20pm

science
14. Chemical runoff from fields, oil spills, and erosion is the major source of (1 point) a. air pollution b. water pollution c. hydropower d. renewable energy 15. Which compound causes the depletion of earth's ozone layer? (1 point) a. ultraviolet radiation b. ...
Wednesday, February 12, 2014 at 12:55pm

physics
1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
Wednesday, February 12, 2014 at 6:37am

physics
A seagull flies at a velocity of 10.00 m/s straight into the wind. (a) If it takes the bird 18.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind?
Tuesday, February 11, 2014 at 4:56pm

algebra based physics
Electric bees. As they fly through the air, honeybees can pick up a small amount of electric charge. Suppose a 0.12-g bee acquires a charge of –65pC. How many excess electrons has the bee acquired? Find the magnitude of the electric force on the bee in the electric field ...
Monday, February 10, 2014 at 9:59pm

science
What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s C) 5 km/...
Monday, February 10, 2014 at 9:10pm

chemistry
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there are 365 days in a...
Monday, February 10, 2014 at 7:49pm

chemistry
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there are 365 days in a...
Monday, February 10, 2014 at 7:49pm

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