Monday
January 16, 2017

# Homework Help: Science: Earth

## Recent Homework Questions About Earth

Math
Lined up 6.7 billion people assume that each person occupied 12inches of the line.how many times around earth would they reach
Monday, June 13, 2016 by Vonn

English
"When in the Course of human events, it becomes necessary for one people to dissolve the political bands which have connected them with another, and to assume among the powers of the earth, the separate and equal station to which the Laws of Nature and of Nature's God...
Sunday, June 12, 2016 by MK

Science
The Environmental Defense Fund, The Friends of the Earth, and The Natural Defense Council, are all divisions of The Environmental Protection Agency. True*** False After the first Earth Day, the Sierra Club expanded to 20 states in 1970. In 1971, the anti-environmental group ...
Sunday, June 12, 2016 by Kaai97

math and science
A space shuttle with a mass of 4,06 X 10kg,orbits earth at a height of 720km above the surface of the earth.calculate the gravitational force experienced by the shuttle
Sunday, June 12, 2016 by Tsuu-mani

Physics
You use a rope to slowly pull a sled and its passenger 45 m up a 20∘ incline, exerting a 125-N force on the rope. How much work did Earth do on the sled for the trip in Part B? The answer for part is -5630 J I'm not sure what to do. I tried -5630 J * 9.8 then I tried...
Saturday, June 11, 2016 by T

Physics
You recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 1700 W/m2 from itâ€™s companion star. If planet Burt has a a radius of 6500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy ...
Saturday, June 11, 2016 by Anonymous

Physics
ou recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 2100 W/m2 from itâ€™s companion star. If planet Burt has a a radius of 7500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy ...
Friday, June 10, 2016 by Anonymous

Physics
At high noon (sun rays fall perpendicular to the surface of the earth), the sun delivers 990 W to each square meter of a blacktop road, emissivity of 1 (blackbody). If the hot asphalt loses energy only by radiation, what is its equilibrium temperature? I have everything ...
Friday, June 10, 2016 by Anonymous

Science
Your journey to the centre of the earth took 64 hours at 100km/h. What was the total distance you traveled??
Thursday, June 9, 2016 by Kim

Math
1. Subtract (4x + 2y) â€“ (8x â€“ 3y). â€“4x â€“ y 12x â€“ y 12x + 5y â€“4x + 5y 2. Determine the best name for the quadrilateral. Graphic rectangle rhombus trapezoid parallelogram ...
Wednesday, June 8, 2016 by Help me PLEASE

Math help plz??
24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters? im guessing its 118 seconds but im not sure..
Tuesday, June 7, 2016 by othilia

Science
what the definition of age range in earth science?
Monday, June 6, 2016 by Jessica

Math
As the earth revolves around the sun, distant objects can be seen from different locations. This idea can be used to measure the distance between earth and nearby stars and is called stellar parallax. To see how this process works, consider the simplified scenario below. A.) A...
Sunday, June 5, 2016 by Cameron

maths
the longest and shortest distance of eareth from sun are r1 and r2. what is the distance of the earth from the sun when it is perpendicular to it
Sunday, June 5, 2016 by lekshmysuresh

Earth Science
Why are boats more efficient than airplanes? They use less fossil fuels to move
Saturday, June 4, 2016 by mike

Physics I (Classical)
Determine the magnitude of the centripetal acceleration of an object on the surface of the Earth at a latitude of 71.6Â°. Consider the Earth to be a sphere of radius R = 6.38 ✕ 106 m.
Friday, June 3, 2016 by Victoria

English
Khianna is preparing an informational presentation for her science class. Her presentation discusses three different theories about what killed the dinosaurs 65 million years ago. The first theory is that an asteriod hit the earth, the second theory is climate change, and the ...
Friday, June 3, 2016 by Bob

Math help plz??
i just need a little help...with this A radio signal travels at 3 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7?
Wednesday, June 1, 2016 by othilia....yes you prob know me...

SCIENCE PLZZ HELP!!!
____ is rate of change of position. Speed Velocity Acceleration Displacement 2. Which of the following is the difference between speed and velocity? direction units speed none of the above 3. A planet is discovered that is the same size as Earth and has the same gravitational...
Sunday, May 29, 2016 by gabby

earth science
state the mostly reason for the differences in the weathering rate of the three rock materials
Wednesday, May 25, 2016 by Celest

* at the end of each question and a couple **** at the end of my answer 1. All of the following can be identified as being part of the counterculture which arose with Baby Boomers during the 1960â€™s EXCEPT: * a. â€œDonâ€™​;...
Tuesday, May 24, 2016 by Anonymous

earth science
When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd
Tuesday, May 24, 2016 by r

social studies
1. Some Polynesian islands are ringÂ­shaped coral islands that surround a body of water, or (1 point) copra. coral. atolls. plates. 2. In the midÂ­1800s, what event played a part in the large increase in British immigration to Australia? (1 point) ...
Monday, May 23, 2016 by HELPPPPPP

A 40m deep well with radius 3.5m is dug & the earth taken out is evenly spead to from a platform of dimension 28m by 22m.find the heght of the platfoem?
Sunday, May 22, 2016 by fira

science
Tom is making the locations of the active volcanoes on a world map. Explain how the locations of the volcanoes are related to earth's plates? please help me im begging you

math
The volume of Jupiter is about 1.43*10^15 cubic kilometers. The volume of Earth is about 1.09*10^12 cubic kilometers. The number of Earths that can fit inside Jupiter can be found by dividing Jupiter's volume by Earth's volume. Find this quotient and express the answer...
Thursday, May 19, 2016 by Claire

Science
Explain the law of motion needed to solve this problem and then solve it. On Planet Zorg a 30 kg barbell can be lifted by only exerting a force of 180 N. What is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change if on Earth. Is it ...
Wednesday, May 18, 2016 by Aiecha

Science
If the earth exerts a 500 N gravitational force on an object in near space, how much force does this object exert on the earth, and by what law can this be asserted?
Wednesday, May 18, 2016 by Alyssa

Language arts
1. Read the sentence from "Zoos: Joys or Jails?" What clue word is used to show contrast between the two points of view? "Although the circumstances and reasons for animals being in zoos vary, its concept has faults many don't notice during their visit with ...
Tuesday, May 17, 2016 by Polar

An object on Earth falls with an acceleration of a=9.81 m/s^2. A function exists between the height from which the object falls, the initial velocity of the object and the time the object spends in the air. h(t)= Vt + at^2 V=initial velocity. T= time. A= acceleration due to ...
Tuesday, May 17, 2016 by Heaven

math
an agriculture field is rectangular, with dimensions 100m by 42m.a 20 m deep well of diameter 14 m is dug in a corner of the field and the earth taken out is spread evenly over the remaining part of the field.find the increase in the level of the field
Tuesday, May 17, 2016 by abel

Biology
Describe the traits that distinguish animals from other organisms Explain the diversity of invertebrates, chordates, and primates using the theory of evolution Describe the structures and body systems of animals that allow them to maintain homeostasis Describe the structures ...
Monday, May 16, 2016 by lola

Science
Historical models of the solar system include: A.Helliocentric,B.nebular,C.Geocentric model or earth centered universe and a _ model or sun centered universe
Monday, May 16, 2016 by Hailey

chemistry
The pressure of the earth's atmosphere at sea level is 14.7 lb/in2. What is the pressure when expressed in kg/m2? (2.54 cm = 1 in., 2.205 lb = 1 kg) 2.62Ã—102 kg/m2 5.02Ã—104 kg/m2 4.30Ã—10-3 kg/m2 2.09Ã—10-2 g/m2 1.03Ã...
Sunday, May 15, 2016 by Ha

physics
at what attitude the value of g would become one forth than on the surface of the earth?
Sunday, May 15, 2016 by zoya

Science
The moon is about 384000 km the earth and its paths around earth is circular. The moon taken 24hr to complete one orbit. The speed at which the moon orbits the earth in km/ hour is
Sunday, May 15, 2016 by Ali

Science
Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?
Thursday, May 12, 2016 by Val

1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. *** C. A living thing dies and its skeleton is left exposed...
Tuesday, May 10, 2016 by Karen

English
â€œOne day, as I scanned the sandy expanse of Northern Africa, I couldnâ€™t find any of the familiar landmarksâ€”colorful outcroppings of rocks in Chad, irrigated patches of the Sahara. Then I realized they were obscured by a ...
Tuesday, May 10, 2016 by quick help needed

Science CHECK ALL
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. *** C. A living thing dies and its skeleton is left exposed...
Monday, May 9, 2016 by Karen

1question last one plz help meeeeeeeeeeeeeeeeeeeee
5. Identify the benefits that your space mission might provide for modern society. Explore the possibility of connecting your space mission with satellites that are already gathering information as they orbit Earth. I DON'T UNDERSTAND THIS ONE QUESTION I UNDERSTAND THE ...
Monday, May 9, 2016 by MS.SUE,DAMON,REED ANYONE

PLZ HELP MT MIND WILL EXPLODE I DONT UNDERSTAND!!!
4. Explain the data you will want to collect on your mission, and list the instruments that youâ€™ll need so that you can collect and store samples while on your mission. Describe how any collected data will be used when you return from your mission. 3 points 5...
Monday, May 9, 2016 by I NEED HELP ASAP

The order of events and ages of rocks by examining positions is *relative dating*. Gaps in rock layers are called *unconformities*. What uses properties of atoms to find ages of rocks? *Absolute Dating*. A life form in Precambrian Time was *Cyanobacteria*. What signaled the ...
Monday, May 9, 2016 by Ava

physics
Calculate the angular momentum of the Earth the arises from its spinning on its axis. Also calculate the angular momentum of the Earth that arises from its orbital motion around the sun. Please help I'm stumped on a take home test.
Sunday, May 8, 2016 by nouh

English
â€œOne day, as I scanned the sandy expanse of Northern Africa, I couldnâ€™t find any of the familiar landmarksâ€”colorful outcroppings of rocks in Chad, irrigated patches of the Sahara. Then I realized they were obscured by a ...
Sunday, May 8, 2016 by quick help please

PHYS 400
The gravitational potential energy of a low-Earth orbit satellite has been estimated at 1.5 million joules. If the satellite has a mass of 417 grams, and g=9.8ms-2, at what altitude (in meters) is the satellite orbiting? Give your answer to the nearest meter.
Sunday, May 8, 2016 by odee

Math
A40m deep wellwith radius 3.5m is dug and the earth taken out is evenly spread to form a plat form ofdimensions 28mby 22m. find the height of the platform.
Saturday, May 7, 2016 by Hiwot

Science one question dont understand plz help ASAP
i know that from earth to the moon is 238,855 miles but i don't know how much that is in months
Wednesday, May 4, 2016 by Thikra

Science
The tracks of the astronauts who landed on the moon are still there in the dust and show no signs of being worn away. This is attruted to the lack of atmosphere on the moon. Which of the following best accounts for the lack of atmosphere. 1)the moon's weak gravity 2)the ...
Wednesday, May 4, 2016 by Zay

mqth and science early childhood
​Children do not need a variety of concrete experiences that enable them to learn the properties of Earth's materials
Wednesday, May 4, 2016 by latavia robinson

math nid this asap tyy
(Velocity and acceleration.) The acceleration of gravity on the surface of the Moon is a = 1.6 m/s2, as opposed to g = 9.8 m/s2 on Earth. An Olympic high-jumper can jump to about 2.35 m on the surface of the Earth. What height could an Olympic high-jumper reach on the surface ...
Wednesday, May 4, 2016 by Than

Biology
What percentage of animals on earth are vertibrates? 5% 25% 50% 95%
Tuesday, May 3, 2016 by Lala

science
Tom is markina locations of active volcanoes on a world map explain how the locations of the volcanoes are related to Earth's plates
Tuesday, May 3, 2016 by kyle

Science
1. Which of the following is the correct definition of minerals? A) A naturally occurring, inorganic solid that has a crystal shape and definite chemical composition. B) A naturally occurring, inorganic solid that forms through crystallization of melted materials. C) A ...
Monday, May 2, 2016 by Tim

Earth science
What is an example of a stable system? How were you able to determine whether or not this system is stable? Please don't attach files, my parents do not allow me to click on any attached files!

Math
24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters?
Sunday, May 1, 2016 by Leet Speaker

LA
2. Read the passage. What technique is the author using to develop point of view? "Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge." a. state a claim b. persuasive language c...
Sunday, May 1, 2016 by Fred

Language Arts, can anyone check?
1. Which statement is shared by both "Zoos: Joys or Jails?" and "Why Do We Need Zoos?" a. clearly stated claim b. humorous introduction c. unsupported facts d. one-sided argument 23 Read the passage. What technique is the author using to develop point of ...
Sunday, May 1, 2016 by Fred

Chemistry
1. Before the Industrial Revolution, the concentration of CO2 in Earthâ€™s atmosphere was about 275 ppm. Considering the effect of CO2 only, calculate the effect that the increase in CO2 has had on the pH of precipitation
Saturday, April 30, 2016 by Jana

2) What phenomenon naturally warms Earth's lower atmosphere and surface? â€¢ the formation of sunspots â€¢ changes in the shape of Earth's orbit â€¢ global warming (MY ANSWER) â€¢ the greenhouse effect 3) ...
Friday, April 29, 2016 by Jessica

LA, Check!
Read the statements Which group is contrasting in point of view? A. "Some people feel that there is lots of wild space that animals should only live there. Other people feel that there is very little wild space left." B. "Humans are destroying the Earth's ...
Thursday, April 28, 2016 by Lauren

lang art
1. Read the sentence from "Zoos: Joys or Jails?" What clue word is used to show contrast between the two points of view? "Although the circumstances and reasons for animals being in zoos vary, its concept has faults many don't notice during their visit with ...
Thursday, April 28, 2016 by heeeeelpppp

Re-post - Science - from Spitfireredhead
Posted by SpitFireRedHead on Wednesday, April 27, 2016 at 8:23am. Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in ...
Wednesday, April 27, 2016 by Writeacher

Science
Which of the following statements is true about Earth's magnetic poles? A.They are located at earths geographic poles B.They are the areas where Earths magnetic field is weakest. C. They are the areas where Earths magneic field is strongest. D. Earth has one dominant ...
Wednesday, April 27, 2016 by Sara

Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in Scotlandâ€™s highlands. b. Mesosaursus, an ancient ...
Wednesday, April 27, 2016 by SpitFireRedHead

Science
A man has a mass of 70 kg on earth .Calculate its mass and weight on moon
Monday, April 25, 2016 by Avdesh

History
â€œWithout consideration of â€˜traditionsâ ​8;™ and prejudices, it [Germany] must find the courage to gather our people and their strength for an advance along the road that will lead this people from its present restricted ...
Friday, April 22, 2016 by Sarah

LA
Read the passage. What technique is the author using to develop point of view? Though zoos are meant to be a joy to viewers and teach lessons about our earth, the zoo jails its inhabitants and passes on faulty knowledge A) State a claim B) Persuasive Language C) Supporting ...
Friday, April 22, 2016 by Maggie

Physics
Calculate the distance, in m, of the centre of mass of the Earth-Moon system from the centre of the Earth. Note: the mass of the Moon is 7.35x10 22kg, the mass of the Earth is 5.98x10 24kg, and their separation is 3.85x10 8m.
Friday, April 22, 2016 by Amber

"President Lincoln's Declaration of Emancipation, January 1, 1863 by Frances E. W. Harper It shall flash through coming ages, It shall light the distant years; And eyes now dim with sorrow Shall be brighter through their tears It shall flush the mountain ranges, And ...
Friday, April 22, 2016 by Tim

Language Arts
"President Lincoln's Declaration of Emancipation, January 1, 1863 by Frances E. W. Harper It shall flash through coming ages, It shall light the distant years; And eyes now dim with sorrow Shall be brighter through their tears It shall flush the mountain ranges, And ...
Thursday, April 21, 2016 by Tim

Math
The distance around the Earth at the equator is about 40074 kilometers find the equatorial diameter of Earth to the nearest kilometer A.12,762 Km B.25,512 Km C.62,884 km D 6,339,700 Km
Tuesday, April 19, 2016 by Applesuace Master

science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...
Tuesday, April 19, 2016 by Help please

science
what can you infer from the fact of all life on earth is related f you go back far enough?
Monday, April 18, 2016 by hey

Physics
Calculate the acceleration of a car that is travelling at a constant speed of 100 km per hour on a straight road. The radius R of the Earth is 6370 km. Why do we not feel this acceleration?
Monday, April 18, 2016 by Hammad

Science
Why the earth rotate each 24 hours?
Sunday, April 17, 2016 by The earth

science help pls pls
Derek designed an experiment to demonstrate interactions between Earth systems. He cleared a patch of land in his backyard and poured a glass of water from a height of 12 inches above the ground. A depression was formed on the land at the spot where the water hit the ground. ...
Friday, April 15, 2016 by Oscar

i really need help with science pls help
The Hawaiian Islands are examples of islands that formed over a hotspot. Based on this information, which of the following processes formed the Hawaiian Islands? Melted rock called magma rose through holes in Earth's crust and gradually solidified as it cooled. Tectonic ...
Friday, April 15, 2016 by Oscar

Physics
A geostationary satellite orbits the Earth in such a manner that it is always directly above the same point on the equator as the Earth rotates. Assuming that this orbit is circular, what is its radius? (The mass of the Earth is approximately 5.97 Ã— 1024 kg and ...
Friday, April 15, 2016 by Joe

Geometry
Average diameter of about 7900 miles. Jupiter has an average diameter of 86900 miles. The volume is Jupiter is approximately how many times larger than the earth?
Wednesday, April 13, 2016 by Mia

Science
If the Earth was tilted so that the Arctic and the Antarctic were in the equator's location, how would it affect the climate?
Wednesday, April 13, 2016 by Keon

science help pls pls
A star is observed from two positions of Earth in its orbit, in summer and winter. Which of these is the best method to calculate the approximate distance of the star from Earth? measure the parallax and use it in calculations measure the red shift of emitted light and use it ...
Wednesday, April 13, 2016 by Oscar

Geometry Honors
On the bridge of a ship at sea, the captain asked the new, young officer standing next to him to determine the distance to the horizon. The officer took pencil and paper, and in a few moments came up with an answer. On the paper he had written the formula d = 3.6 square root h...
Wednesday, April 13, 2016 by Ryan

science
Explain what would happen if your epiglottis stopped working properly. A. you would have to go to dialysis to get your blood filtered everyday B. you would have to use an inhaler when the pollen or dust repeatedly bothered you C. you would choke on food when it went down the ...
Wednesday, April 13, 2016 by josiah

physics
Suppose that 7.40 g of hydrogen is separated into electrons and protons. Suppose also that the protons are placed at the Earth's north pole and the electrons are placed at the south pole. What is the resulting compressional force on the Earth?
Tuesday, April 12, 2016 by lila

Mathematics
1. Which of the following is the correct definition of minerals? (1 point) a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition a naturally occurring, inorganic solid that forms through crystallization of melted materialsâ&#...
Tuesday, April 12, 2016 by Queen/Halle

HEALTH PLZ HELP MEEEEEEEEEEEE ASAPPPPPPPP
Explain what would happen if your epiglottis stopped working properly. A. you would have to go to dialysis to get your blood filtered everyday B. you would have to use an inhaler when the pollen or dust repeatedly bothered you C. you would choke on food when it went down the ...
Tuesday, April 12, 2016 by Sparkles_01

Health Plz help THX!!
Explain what would happen if your epiglottis stopped working properly. A. you would have to go to dialysis to get your blood filtered everyday B. you would have to use an inhaler when the pollen or dust repeatedly bothered you C. you would choke on food when it went down the ...
Tuesday, April 12, 2016 by Sparkles_01

PHYSICS HELP!!
(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...
Monday, April 11, 2016 by Ben

A radio signal travels at 3 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7?
Monday, April 11, 2016 by Sydney

PHYSICS!!
(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for the astronauts to ...
Monday, April 11, 2016 by tom

Energy of satellite PHYSICS
An m = 43 kg mass instrument package is put into orbit at an altitude above the Earth of A = 23000 km. What is the kinetic energy of this satellite in Joules?
Sunday, April 10, 2016 by Stephanie

Science
Two pellets, each with a charge of 1.5 microcoulomb (1.5Ã—10−6 C ), are located 2.8 cm (2.8Ã—10−2 m ) apart. Part A Find the electric force between them.Part B What would be the mass of an object that would experience this same force in ...
Saturday, April 9, 2016 by Rachel

Physics
1 m pendlum on Earth has a period of 2 s. What would it's period be on the moon where the acceleration due to gravity is 1.63 m/s2 ?
Friday, April 8, 2016 by Aminah

science
according to wegeners hypothesis of continental drift ? A. Earths surface B. The continents C. Earth is slowly cooling and shrinking D. The continents joined
Thursday, April 7, 2016 by Xxoreo_~chan_xX

Science
Which of the following can be expected to occur as climate change continues on Earth? A. Decreased melting of sea ice B. Decreased migration of pests and pathogens*** C. Increased freshwater sources D. Increased coastal flooding
Thursday, April 7, 2016 by Dylan

physics
A certain pendulum on Earth has a period of 1.6 s. What would be the period of this pendulum if it were taken to another planet that had 1.75 times the mass of the Earth and 2.5 times the Earth's radius? Express your answer in seconds to three significant digits.
Thursday, April 7, 2016 by Zac

english
4. Shenzhen is a shoking place, like nowhere elseon earth that i have ever seen. (make a question with sentence " i have ever seen") 5. The new Hopewell Highway runs from Shenzhen to Guangzhou. (make a question with " where question") 6. So the traffic will...
Wednesday, April 6, 2016 by anonim

english
Please make a question 1. In 1982 it was a fishing village with two main roads, fields, and a population of 3 million. It is growing at an incredible speed (make a question with sentence "it is growing at an incredible speed ") 2. China is changing. It is no longer a...
Wednesday, April 6, 2016 by ina

Science
Why do scientists study images made with parts of the electromagnetic spectrum other than visible light? A)These images are the only way to observe galaxies beyond our own. B)These images reveal information that visible light does not show. C)These images show important data ...
Monday, April 4, 2016 by Cam