Friday
April 18, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

Post a New Question | Current Questions

Physics
Planet X has six times the diameter and seven times the mass of the earth. What is the ratio gX : ge of gravitational acceleration at the surface of planet X to the gravitational acceleration at the surface of the Earth?
Monday, February 4, 2013 at 7:04pm

physics
The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so? (Hint: Let the terms in ...
Monday, February 4, 2013 at 4:45pm

physics
The Moon is about 3.8 X 105 km from the Earth. Show that its average orbital speed about Earth is 1026 m/s
Monday, February 4, 2013 at 3:54pm

physics
The planet Jupiter is more than 300 times as massive as the Earth But it so happens that a body would scarcely weigh three times as much on the surface of Jupiter as it would on the surface of Earth. Can you think of an explanation for why this is so? (Hint: Let the terms in ...
Monday, February 4, 2013 at 3:47pm

Physics
According to Anna, on Earth, Bob is on a spaceship moving at 0.8c towards Earth, and Carl, a little farther out, is on a spaceship moving a 0.9c towards Earth. According to Bob, how fast is Carl moving relative to Earth? (a) According to Bob, how fast and in what direction is ...
Monday, February 4, 2013 at 11:35am

Physics
A rocket is launched from rest and moves in a straight line at 42.5 ° above the horizontal with an acceleration of 62.5 m/s2. After 32.0 s of powered flight, the engines shut off and the rocket follows a parabolic path back to earth. Find the time of flight from launch to ...
Monday, February 4, 2013 at 9:46am

Physics
The acceleration of gravity (g) is 9.81 m/s^2 on Earth and 1.63 m/s^2 on the moon. It is therefore higher on Earth by a factor of 6.02. The period of a pendulum is P = 2 pi sqrt(L/g) Since you are using the same clock in both places, L stays the same and the period will be ...
Monday, February 4, 2013 at 5:53am

Physics
At what rate will a pendulum clock run on the Moon, where the acceleration due to gravity is 1.63 m/s2 , if it keeps time accurately on Earth? That is, find the time (in hours) it takes the clock’s hour hand to make one revolution on the Moon. provide solutions and ...
Monday, February 4, 2013 at 5:22am

algebra
First of all, what kind of motion is this? If t = 0, that is, initially, the ball was 260 below the ground. Secondly, I don't recognize those units, definitely not on this earth. anyway ... -80t^2 + 340t - 260 = 0 divide each term by -20 4t^2 - 17t + 13 = 0 (4t - 13)(t - 1...
Sunday, February 3, 2013 at 11:22pm

PHYSICS
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of the apple. #3.) ...
Sunday, February 3, 2013 at 4:23pm

PHYSICS
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of the apple. #3.) ...
Sunday, February 3, 2013 at 4:23pm

Physics
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to the printer #2.) If a 0.9 kg apple falls from a tree and hits the ground with a force of 8.82 N calculate the acceleration of the apple. #3.) ...
Sunday, February 3, 2013 at 4:22pm

physics
v = √(2as) 1.61 = √(2*a*39.4) a 0.0329 Obviously not on earth, or there is a major updraft. On earth the velocity would be much more than 1.61 m/s.
Saturday, February 2, 2013 at 5:27pm

PHYSICS
Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 93 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of ...
Friday, February 1, 2013 at 2:32am

physics
Suppose that on earth you can throw a ball vertically upward a distance of 2.39 m. Given that the acceleration of gravity on Mars is 3.80 m/s2, how high could you throw a ball on Mars? (Take the y-axis in the vertical direction, and assume that the location of your hand is at ...
Thursday, January 31, 2013 at 11:53pm

Physics
The potential energy decreases by an amount G M m/R Where M is the Earth's mass, m is the meteor mass, and R is the radius of the Earth. G is the universal constant of gravity. That energy increases the kinetic and thermal energy of the meteor and the atmosphere through ...
Thursday, January 31, 2013 at 8:58pm

Science 8R - HW Qs. Check (#2)
How long does it take the earth to revolve around the sun? my answer - 365 days right????
Thursday, January 31, 2013 at 8:09pm

Science 8R - HW Qs. Check
How long does it take the earth to rotate on its axis? my answer - 365 days right????
Thursday, January 31, 2013 at 8:08pm

Physics
If a 60 kg meteor falls to earth from a great distance. How much gravitational potential energy does it lose? (the energy PE is 0 at a great distance). What happens to this potential energy? Final-Initial=-Gmm/r-0=change in energy
Thursday, January 31, 2013 at 8:02pm

Science (incomplete)
What season of the year? At what part of the earth? Google sunrise and sunset for your area and date.
Thursday, January 31, 2013 at 6:02pm

Physics
On the surface of the earth, the weight weight would be W = M*g = 200*9.8 = 1960 Newtons The Earth's radius is 6370 km. Your orbit radius is 40,000 km. The weight is proportional to 1/R^2, so at 40,000 km the weight is 1960*(6370/40,000)^2 = 49.7 Newtons
Thursday, January 31, 2013 at 9:29am

Physics
A communcations satellite of mass 200kg is in circular orbit of radis 4x10^4 km measured from the center of the earth. What is the gravitational force on the satellite and what fraction is this of its weight on the surface of the earth?
Thursday, January 31, 2013 at 5:04am

physics
heading due north at 6.00 m/s relative to the water. The local ocean current is 1.53 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?
Thursday, January 31, 2013 at 2:29am

calculus 2
An object falls off a 400-foot tower. With g=32ft/sec^2, as at the Earth’s surface, the object would hit the ground after 5 seconds. What would the acceleration due to gravity have to be to make it reach the ground in half the time?
Thursday, January 31, 2013 at 1:13am

Physics
(a) KE(rot) =I ω²/2 I=2MR²/5 ω=2π/24•3600 = ...(rad/ s) Earth’s mass is M = 5.97•10²⁴kg, Earth’s radius is R = 6.378•10⁶ m. (b) Linear velocity of the Earth is v=ωr = 2π• 1.496•10¹¹...
Wednesday, January 30, 2013 at 6:30pm

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...
Wednesday, January 30, 2013 at 6:19pm

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...
Tuesday, January 29, 2013 at 8:33pm

Physics
1) Find the magnitude of the gravitational force a 68.6 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 10 24 kg and a radius of 6.37 × 10 6 m. The universal gravitational constant is 6.673 × 10 −11 N · m2...
Tuesday, January 29, 2013 at 7:00pm

Math
A satellite which travels around the earth has a power supply that provides power according to the formula: P = 17200/t + 100 where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in watts/day (enter as a positive...
Tuesday, January 29, 2013 at 6:44pm

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used in the United States ...
Tuesday, January 29, 2013 at 6:05pm

science
True or false A.the moon revolves around the earth B.it takes one year for the earth to revolve around the sun Che earth rotates once a day
Tuesday, January 29, 2013 at 5:48pm

science
The seasons change BC A.the earth rotates slowly or B. The earth is tilted on its axis as it revolves around the sun
Tuesday, January 29, 2013 at 5:36pm

Physics
A 2.98 kg ball is dropped from the roof of a building 158.3 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 13.1 N on the ball. A.)How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s^2. Answer in units of s ...
Tuesday, January 29, 2013 at 8:28am

Motion Problems
A satellite which travels around the earth has a power supply that provides power according to the formula: P =(17200)/(t + 100) where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in watts/day (enter as a ...
Tuesday, January 29, 2013 at 6:17am

Physics
F = G*M*m/R(earth)^2 M = Earth mass m = person's mass Just crank out the number. Since those are the actual earth mass and radius values, the answer must also be M*g = (65.4 kg)(9.81 m/s^2) = 642 N Both formulas agree.
Tuesday, January 29, 2013 at 3:35am

Physics
Find the magnitude of the gravitational force a 65.4 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 1024 kg and a radius of 6.37 × 106 m. The universal gravitational constant is 6.673 × 10−11 N · m2/kg2. ...
Tuesday, January 29, 2013 at 1:08am

Physics
You weigh 526 N on earth. Planet X has twice the mass of Earth and the radius of Earth . What is your weight in newtons on planet X?
Monday, January 28, 2013 at 7:00pm

physics
484 km W20N as all these numbers are measurements, they can be accurate, but not exact. Also, there is wind speed, which affects the ground speed of the plane. Also, there is curvature of the earth and uneven terrain.
Monday, January 28, 2013 at 5:13pm

PHYSICS 1 ..lab helllpppppppp
1.described the motion of mud that flies off from a rapidly spinning wheel. 2.explain why the outer rail is higher than the inner rail of curve in a railroad track. 3. a 5kg mass is moving in a circle of a radius 3m at a speed of 30 m/sec.determine the required centripetal ...
Monday, January 28, 2013 at 7:56am

phy
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 ...
Monday, January 28, 2013 at 3:34am

sicence
The following elements as alkali, alkaline-earth or transition metals based on their positions in the periodic table: A:) iron , Fe. C:) strontium, Sr B:)potassium, k d:) platinum, Pt
Sunday, January 27, 2013 at 10:09pm

physics
An 80kg astronaut has a weight of 120N. How many radii above the earth is he?
Sunday, January 27, 2013 at 5:06pm

physics
If Santa were in the elevator at the North Pole - where the earth's radius is less than at the equator - he is closer to the center of the earth and would therefore weigh more.
Sunday, January 27, 2013 at 1:47am

Physics
A red ball is thrown down with an initial speed of 1.3 m/s from a height of 28.0 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 24.7 m/s, from a height of 0.8 meters above the ground. The force of ...
Saturday, January 26, 2013 at 1:37pm

Chemistry help
Write a descriptive text and a word equation on how silicon is extracted from earth's crust' .
Saturday, January 26, 2013 at 10:44am

Science
The density of the sun's core is about 160 g/cm. The density of the earth's core is about 13.0 g/cm. About how many times denser is the sun's core than Earth's?
Friday, January 25, 2013 at 6:15pm

Physics
The object is at the earth's surface.
Friday, January 25, 2013 at 5:39pm

physics
135 * 9.81 Newtons or more likely if the scale is calibrated for use here on earth it would read 135 kg
Friday, January 25, 2013 at 4:59pm

Physics HELLLPPPP
-The distribution of mass in the earth is spherically symmetric. Yes, if all the mass were under Paris, g would be very high there. -The density of the earth is the same everywhere. No, all the mass could be at the center -The earth's interior is solid everywhere. No, ...
Friday, January 25, 2013 at 4:57pm

physicss
on earth we are given that W = m g = 9.81 m = 17.1 N so m = 17.1/9.81 = 1.74 kg F = m a in static case a = 0 so m g - k x = 0 x = m g/k .044 = 17.1/k so k = 389 Newtons/meter on moon Gmoon = g/6 = 9.81/6 = 1.64 m/s^2 mg moon = (1/6) mg earth = 17.1/6 stretch moon = stretch ...
Friday, January 25, 2013 at 4:51pm

physicss
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 /6 g. Find the reading of the spring scale on the moon...
Friday, January 25, 2013 at 4:30pm

PHYSICS!!!!HELP PLEASE
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 /6 g. Find the reading of the spring scale on the moon...
Friday, January 25, 2013 at 4:28pm

Physics HELLLPPPP
When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
Friday, January 25, 2013 at 4:16pm

Physics
When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
Friday, January 25, 2013 at 4:15pm

Physics
When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? The distribution of mass in the earth is spherically symmetric. The density of the earth is the same everywhere. The earth's interior is solid ...
Friday, January 25, 2013 at 4:14pm

PHYSICS *_* HELP PLEASE
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 6 g. Find the reading of the spring scale on the moon...
Friday, January 25, 2013 at 3:27pm

Science
The intensity of an earthquake wave passing through the Earth is measured to be 1.5×10^6 J/m^2*s at a distance of 58km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2...
Friday, January 25, 2013 at 1:16pm

Chemistry
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 155 cal/g. The scientist observing the extraterrestrial life form also ...
Friday, January 25, 2013 at 10:11am

Chemistry
How on earth did you get 114 lbs.??? At the end of 4 hours >> 90 * 2 = 180 lbs. At the end of 8 hours >> 180 * 2 = 360 lbs. At the end of 12 hours >> 360 * 2 = 720 lbs.
Thursday, January 24, 2013 at 10:38pm

Physics
if the force on the moon is 1/6 of that than Earth, the readin gwill be 1/6. Period? Period=2PI sqrt (mass/k) but k= 17.1/.0440 N/m, mass is 17.1/9.8 kg
Thursday, January 24, 2013 at 8:21pm

Physics
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1/6g Find the reading of the spring scale on the moon. ...
Thursday, January 24, 2013 at 8:11pm

Physics
Find g at a point on earth where T = 2.249 s for a simple pendulum of length 1.250 m, undergoing small-amplitude oscillations. (Enter your answer to four significant figures.) CAN YOU PLEASE PROVIDE AN ANSWER WITH WORK . THANK YOU VERY MUCH!!!!!
Thursday, January 24, 2013 at 8:09pm

Physics
A pendulum clock is accurate on earth, where the period of its pendulum is 1.00 s. (a) Find its period on the moon, where gravitational acceleration is 1.6 m/s2. (b) During a 2 h interval, what would be the elapsed time shown on the clock? CAN YOU PLEASE PROVIDE AN ANSWER WITH...
Thursday, January 24, 2013 at 8:08pm

Physics
A spring scale being used to measure the weight of an object reads 17.1 N when it is used on earth. The spring stretches 4.40 cm under the load. The same object is weighed on the moon, where gravitational acceleration is 1 6 g. Find the reading of the spring scale on the moon...
Thursday, January 24, 2013 at 7:44pm

spatial organisation of society
Spatial organisation of society is concerned with the pattern of arrangement,It refers to the arrangement of physical and human objects on the earth surface.
Thursday, January 24, 2013 at 2:26am

physics
Light from the sun reaches Earth in 8.3 min. How far is the Earth from the sun? The velocity of light is 3 × 108 m/s. Answer in units of m
Wednesday, January 23, 2013 at 8:08pm

science
Why are fossil fuels such rich sources of energy for humans, but rocks are not? A. Rocks are too old to contain energy. B. Rocks are too difficult to extract from Earth. C. Fossil fuels contain energy-rich carbon from once-living organisms. D. Both rocks and fossil fuels ...
Wednesday, January 23, 2013 at 3:04pm

science
such as earthquakes Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle layer
Wednesday, January 23, 2013 at 9:01am

science
What is the gravitational potential energy of a 2kg ball on planet earth raised 15 meters in the air?
Tuesday, January 22, 2013 at 11:04pm

physics II
What is the magnitude of the earth's gravitational field at the location of the ISS?
Tuesday, January 22, 2013 at 10:32pm

English Communication
6. Each of the following words has the suffix -ed. Which word is spelled correctly? A. Plotted B. Preenned C. Duckked D. Cleanned 8. When reading a newspaper, you come across the word subterranean. You guess the meaning of the word by breaking it into its parts. You know that...
Tuesday, January 22, 2013 at 2:27pm

Physics
Earth’s mass is M = 5.97•10²⁴kg, G =6.67•10⁻¹¹ N•m²/kg², R=5 • 6.378•10⁶ = .. (a) mv²/R = G•m •M/R² v=sqrt{ G •M/R) = … (b) T=s/v =3πR/v
Tuesday, January 22, 2013 at 10:51am

Physics
(a) Find the speed of a satellite moving around the earth in a circular orbit that has a radius equal to five times the earth's radius of 6.38 106 m. (b) Find the satellite's orbital period. Please Help!
Monday, January 21, 2013 at 11:07pm

Physics
How far above the surface of the earth would you have to be before your weight is reduced by 12.89%? Please Help !
Monday, January 21, 2013 at 11:06pm

Physical Science
The distance from earth to the sun is 1.5x10 to the 11th power minutes and light travels at a speed of 3.0x10 to the 8th power m/s. How long does it take sunlight to reach the earth? Give answer in minutes and seconds.
Monday, January 21, 2013 at 9:26pm

Physics
t(Earth) = t(satellite) / (square root) 1 - (v/c)^2 = t(satellite) / (square root) 1 - [ (3.9 x 10^3) / (3x 10^8)^2 ] = (1 - 1.7 x 10^-10)^ - 1/2 [ t(satellite) ] t(Earth) = (1 + 8.5 x 10^-11) [ t(satellite) ] GMEarth = (6.67 x 10^-11 N x m^2/kg^2) (5.98 x 10^24 kg) = 4.0 x 10...
Monday, January 21, 2013 at 8:59pm

Physics
A GPS satellite orbits at an altitude of 2.0 x 10^7 m and a speed of 3.9 x 10^3 m/s, Earth’s radius is 6.4 x 10^6 m, and a point at its equator has tangential speed of 460 m/s, By approximately what fraction must the time be adjusted to account for both regular/speed-...
Monday, January 21, 2013 at 8:53pm

Physics
I've been stuck on this equation for a while and I don't know if i'm missing a key part to the equation.. i just need help! If the gravitational field strength at the top of Mount Everest is 9.772 N/kg, approximately how tall (in feet) is the mountain? F= g ( m1 x ...
Monday, January 21, 2013 at 10:51am

Physics
A pendulum and a mass spring system are both undergoing simple harmonic motion on Earth (use g = 10 N/kg). It is observed that every time the pendulum goes back and forth, the spring has gone up and down 12 times. If the pendulum has a length of 4 meters and the mass is 100 g...
Sunday, January 20, 2013 at 11:35pm

Physics
A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm^2 on a piece of paper help perpendicularly to the Sun’s rays. The intensity of sunlight at the Earth is 1.4 x 10^3 W/m^2, but only half of this energy penetrates the atmosphere ...
Saturday, January 19, 2013 at 7:43pm

Physics
A boy's hand pushes a ball through a vertical distance of 1.45 m as he throws the ball straight upward. Once the ball leaves his hand it travels an additional 22 m (straight up) before returning to earth. Find the acceleration of the ball while it was in the boy's hand
Saturday, January 19, 2013 at 6:45pm

physics
A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm^2 on a piece of paper help perpendicularly to the Sun’s rays. The intensity of sunlight at the Earth is 1.4 x 10^3 W/m^2, but only half of this energy penetrates the atmosphere ...
Saturday, January 19, 2013 at 11:31am

science/evolution
All lifeforms on Earth have a common system. ??
Friday, January 18, 2013 at 6:40pm

Math
111. Cold Water Survival When a person falls through the ice on a lake, the cold water removes body heat 25 times faster than air at the same temperature. To survive, a person has between 30 and 90 seconds to get out of the water. How long could a person remain in air at the ...
Friday, January 18, 2013 at 1:22pm

Science
WHat fraction of the earth is covered in water? Forgot my science book HELp
Thursday, January 17, 2013 at 8:09pm

astronomy
If we represent the sun as volleyball (diameter =65cm)how far away would be find earth in this model? Note the suns actual diameter is 1.4x10^9 meters.
Wednesday, January 16, 2013 at 2:17pm

astronomy
if the earths orbit is 1.5x10^8km, determine how fast earth moves along its orbit assume there are 365 days in a year. remember the circumference of a circle is equal to 2pi where r is the radius.
Wednesday, January 16, 2013 at 2:08pm

MATH PROBLEM
-One revolution of the Sun by the Earth requires 365 days, 5 hours, 48 minutes and 49.7 seconds. the 5 hours, 48 minutes and 49.7 second is approximated to 1/4 of a day. Every 4th year, one full day is added( leap year). How much of an error in minutes and seconds does this ...
Wednesday, January 16, 2013 at 4:02am

Science
2. Summer occurs on the hemisphere of Earth that is _____. turned away from the sun tilted toward the sun tilted away from the sun turned toward the sun 3. Earth has a(n) _____ and _____ magnetic pole, just as a bar magnet has opposite magnetic poles at each of its ends. up, ...
Tuesday, January 15, 2013 at 1:02pm

Physics
the object experiences constant acceleration due to gravity. That means that its speed steadily increases. That means that each second, it falls farther than it did in the previous second. distance is proportional to the square of the time falling. in fact, s = 1/2 at^2 where ...
Tuesday, January 15, 2013 at 11:15am

Physics
how fast would you have to be traveling at in a spaceship in order to appear to age 20% slower than your classmate left behind on earth
Monday, January 14, 2013 at 3:33pm

statistics
El Nino and the mosoon. The earth is interconnected. For example, it appears that El Nino, the periodic warming of the Pacific Ocean west of South America, affects that the monsoon rains that are essential for agriculture in India. Here are the monsoon rains (in millimeters) ...
Monday, January 14, 2013 at 1:09am

Physics
A satellite moves in a circular orbit around the Earth at a speed of 5.4 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal ...
Sunday, January 13, 2013 at 10:20pm

earth science
I should point out that none of them are in their free state. For example, you won't find oxygen gas but you will find it as oxides (iron oxide, calcium oxide, etc).
Sunday, January 13, 2013 at 6:21pm

earth
I think it might be D.
Sunday, January 13, 2013 at 4:21pm

earth
#33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because your eyes do need to...
Sunday, January 13, 2013 at 4:17pm

earth
:)
Sunday, January 13, 2013 at 4:09pm

earth
haha okay thnx again ^_^ much appreciated
Sunday, January 13, 2013 at 4:03pm

earth
answered most of your Q's :) and thanks for answering mine! :P
Sunday, January 13, 2013 at 3:58pm

earth
A.
Sunday, January 13, 2013 at 3:53pm

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