# Homework Help: Science: Earth

## Recent Homework Questions About Earth

Science
The weight of a body on the surface of the earth is 392N .What will be the weight of this body on a planet whose mass is double that of the earth and radius is four times that of the earth

uv,,math
find the distance between the cities,,assume that thee earth is a sphere radius of 4000 miles at that cities are on same longitude, one city is due north of the order,,,San Francisco California has 37 degree 47'36" while Seattle,Washington 47 degree 37'18"

Science
Assume that a spacecraft can travel at the speed of 100,000 km, how many days will it take to get from Earth to Mars?

biology
Which of the following is the definition of ecology? -the social movement with a goal to protect the environment -the recycling of human-made materials to reduce the waste going into landfills -the study of interactions among organisms and between organisms and their ...

Science
What the force of attraction between earth and objects on earth surface pesanteur..I need it English

Chemistry
For my lab, I have been asked to calculate the pKa of an unknown amino acid. We titrated the unknown amino acid with NaOH. The pKa needs to be calculated using the Henderson Hasselbach Equation. Obviously you can just get the pH from any point on the graph but what values do ...

Physics
a ship is headed towards east at a thrust speed of 7.00 knots. A strong wind pressure causes the ship to deviate to the north at 1.00 knots. The sea current is flowing to the southwest at 4.00 knots. Determine the velocity of the ship relative to the earth's surface.

Physics
A student with mass 55 kg jumps off a high diving board. Using 6.0×10^24 kg for the mass of the earth, what is the acceleration of the earth toward her as she accelerates toward the earth with an acceleration of 9.8 m/s2 ? Assume that the net force on the earth is the force ...

Physics
The average distance between the earth and the sun is 1.50X10^8 A. calculate the average velocity in km/h of the earth along its original path The average distance between the earth and the sun is 1.50X10^8 B. convert your answer from km\h to m\s. Show all units.

astronomy
At your telescope, you measure the parallax of the star Regulus to be one-half of the parallax of the star Denebola. What do you immediately know about their relative distance from us? a) That Regulus is further away than Denebola. b) That Regulus is closer than Denebola. c) ...

physics
How do the laws of physics apply to others sciences such as biology chemistry and earth science? And give an example to show the connection.

Science
Radius of the earth is 6400km and g is 9.8 m÷s find the value of g produced on a mass of 20 kg at a distance of 10000km from the earths surface ?

Astronomy
An astronomical unit can be thought of as... a 25 light years b 19 earth years c 93 million miles d 100 billion miles

Math
The circumference of earth is about 40,030.02km. The formula for circumference is c=2(3.14)r.jennifer determines the radius of earth is about 12,700km.use estimation to determine if Jennifer measurement is reasonable.

English Writing
People believe in God because... And there is life on earth because... And people who believe in God think that God has put human beings on this earth because... Could you help me? I'm not English speaker so I don't know how can I write continue of these sentences...

The National Aeronautics and Space Administration (NASA) has just released some startling information. The Earth's temperature reached its highest point in 136 years of record-keeping during July. "July 2016 was absolutely the hottest month since the instrumental records began...

Science Earth
Guard cells are closed during the night. This means that no gases can come in or out of the stomata. Why would the plant not need to take in gas during the night? How can I answer in this question?

English Writing
Please help me... People believe in God because... And there is life on earth because... And people who believe in God think that God has put human beings on this earth because... I have to write continue of these sentences... Could you guys help me please?

science help pls pls
The table below shows the average distances of Jupiter and Earth from the sun. Name of Planet Average distance from the sun (in AU) Jupiter 5.2 Earth 1.0 What is the difference between the orbital periods of Jupiter and Earth? 4.20 years 6.20 years 8.86 years 10.86 years 12.40...

biology
which of the following is consistent with the theory of vitalism ? A.all matter contains a vital force** b.the chemistry of life and nonlife are similar c. living things contain a vital force absent in nonliving things d. life must be sustsained through a series of chemical ...

biochemistry
which of the following is consistent with the theory of vitalism ? A.all matter contains a vital force** b.the chemistry of life and nonlife are similar c. living things contain a vital force absent in nonliving things d. life must be sustsained through a series of chemical ...

English
Choose the best action or situation. An example of a metonym for the planet earth. soil globe rock moon Answer: globe

One more thing!
Day had broken cold and gray, exceedingly cold and gray, when the man turned aside from the main Yukon trail and climbed the high earth-bank, where a dim and little traveled trail led eastward through the fat spruce timberland. It was a steep bank, and he paused for breath at ...

physics
Find the density of the earth if its mass is 6×10^3kg and radius is 6.4×10^3km

Math
A 120Ib person would weight about 20Ib on the earth's moon. A 150 Ib person would weight 28I Ib on lo, a moon of Jupiter. Use ratio table to determine which make a person weight the most

English
Just out of curiosity, is it okay to use the phrase "and so" in a sentence? Like "Johnathan knew that he had to help the boy asking a question on Jiskha. And so, he did just that, and the boy went on to being the happiest boy on earth." I just need to know if "and so" is a ...

chemestry
the Earth has mass of approximately 5.98* 10^24kg and radius 6.38* 10^6m. what is the density of the Earth in (a)g/cm^3 and (b) kg/m^3 ?

Maths Algebra
Mass of Earth is (5.97×10^24)kg and Mass of Moon is (7.35×10^22)kg.What is the Total mass of the two?

Maths Algebra
The diameter of Sun is (1.4 ×10^8)m and the diameter of Earth is (1.2742×10^4)m . Show that the diameter of sun is nearly 100 times the diameter of Earth.

language arts - Ms. Sue, please check
“Lord of the Rings” is an epic fantasy adventure set in the world of Middle Earth. The story opens when Bilbo Baggins, an elderly hobbit, give his beloved nephew, Frodo, a plain gold ring. Then Bilbo disappears. Soon, Frodo is visited by strange beings, including a ...

“Lord of the Rings” is an epic fantasy adventure set in the world of Middle Earth. The story opens when Bilbo Baggins, an elderly hobbit, give his beloved nephew, Frodo, a plain gold ring. Then Bilbo disappears. Soon, Frodo is visited by strange beings, including a ...

physics
calculate the escape velocity of a satellite from the earth's gravitational field,if the radius of the earth is 6.4×10^6m

physics math
A cruise ship moves southward in still water at a speed of 20.0 km/h, while a passenger on the deck of the ship walks toward the east at a speed of 5.0 km/h .The passengers velocity with respect to Earth is?

Physics
The earth has a radius of 6380 km and turns around once every 24 hours. What is the average speed of a person resting at the equator?

physics
a woman who weighs 150 lb. on earth would weigh 340 lb. on another planet, what is her mass on earth, what is her mass on the other planet, what is the magnitude of the gravitational field on the other planet

Science
It can be inferred from the passage that radioactive dating is important for estimating the age of A) all known meters B) all existing planets C) the earth D) the trees

Geography
What happens when we move vertically upwards from the earth

math
The ratio of an objects weight on earth to its weight on Neptune is 5:7. How much would a person who weighs 150 pounds on earth weigh on Neptune? A.210 pounds B.750 pounds c.107 1/7 pounds D.170 pounds

Science
40 degrees north runs along 146th street on the north side of Indianapolis. What is the rotational velocity of the surface of the earth at 40 degrees north?

Science
When did the first human exist? And when did they start populating the earth?

Physics
If you weigh 670 N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 15.0 km ? Take the mass of the sun to be ms = 1.99×1030 kg , the gravitational constant to be G = 6.67×10−11 N⋅m2/kg2...

Physics
A second's pendulum is taken on the surface of moon where acceleration due to gravity is 1/6th of that of earth.Will the time period of pendulum remain same or increase or decrease?Give a reason.

Math
The earth takes 365 1/4 days to go around the sun. Mercury takes 3 days less than 1/4 of this time. How many days does Mercury take to go around the sun? I believe I would have to find 1/4 of the 365 1/4 days then take 3 days out. I was given this do as home work but was not ...

Physics
Horizontal electric power lines supported by vertical poles can carry large currents. Assume that Earth’s magnetic field runs parallel to the surface of the ground from south to north with a magnitude of 0.50××10^-4 Tesla and that the supporting poles are 38 m apart. Find ...

math
If earth rotates at about 1000 mph and it rotates constantly each day. How many rotations will it complete after 4th hour, 8th hour and 24th hour.

Science
If you weigh 300 N on earth, then what is your mass and weight in mars?

physics
the acceleration of free fall on the moon is one sixth of that on earth. what would be the period on the moon of a simple pendulum which has a period of one second on the earth?

science
A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha. The earth's magnetic feild component in the direction perpendicular to swing is B. the max potential diff induced across pendulum is?

Physics
An astronaut wearing a spacesuit can jump 0.5 m vertically at the surface of the earth. The gravitational acceleration on Mars is 0.4 times that on the earth. If her takeoff velocity is the same, how high can the astronaut jump on Mars?

Biology
1. When and where was the first cell born? How did it happen? 2. What are the circumstances that make the appearance of the cell in this earth? 3. What are the differences between prokaryotic and eukaryotic cell? How about plant and animal cell?

Physics
A planet with density equal to Earth is 2R times far away from earth, if we double the distancs from 2R to 4R then "g" becomes:-

Physics
A satellite orbits the Earth with a radius of 7000km. The acceleration of gravity at this distance=8.17m/s/s. How do I find the velocity of the satellite? I'm really struggling with finding the correct formula. I know the answer but can't figure out how to get there. Thanks if...

science
How Do the Earth's Four Subsystems Work Together?

Physics
I'm really struggling trying to understand what formulas to use for the following: A satellite orbits the earth with a radius of 7000 km. (a) what is the acceleration of gravity at this distance? (b) what is the velocity of the satellite? (c) how long does it take the ...

Physics
I'm really struggling trying to understand what formulas to use for the following: A satellite orbits the earth with a radius of 7000 km. (a) what is the acceleration of gravity at this distance? (b) what is the velocity of the satellite? (c) how long does it take the ...

geometry
The summit of Mount Everest is approximately 29,035 ft above sea level. What is the distance from the summit to the horizon, rounded to the nearest mile? Assume that the distance from the Earth's center to any point on Earth's surface is 4,000 miles. How do I solve this?

math
Help? The summit of Mount Everest is approximately 29,035 ft above sea level. What is the distance from the summit to the horizon, rounded to the nearest mile? Assume that the distance from the Earth's center to any point on Earth's surface is 4,000 miles.

Bio
Which of the following best describes the influence of latitude on climate? A. Temperate regions receive more solar energy and heat per unit area than tropical regions. B. Polar regions receive less solar energy and heat per unit area than tropical regions. C. Earth's climate ...

science
How much below the surface of the earth does the acceleration due to gravity become 1percent of its value at the earth surface? The earth is assume to be a sphere of radius 6.4×10^6m.

Physics
A satellite orbits at a distance from the Earth's center of abut 3.00 earth radii and takes 7.30 hours to go around once. What distance (in meters) does the satellite travel in one day? And, what is the orbital velocity (in m/s)? I'm completely lost. I haven't gotten even ...

General Physics
Clarification: this is calculus-based physics, so the methodology is not restricted to trigonometry only. I have two questions, so hopefully I can divide them up nice and evenly. Also, if you know where I should copy and paste proper vector notation from, please tell me so I ...

Math
The path of a satellite orbiting the earth causes it to pass directly over two tracking stations A and B, which are 35 mi apart. When the satellite is on one side of the two stations, the angles of elevation at A and B are measured to be 87.0° and 84.2°, respectively. (Round...

Earth science
the land will heat up the most because _____ ???

Earth science
How do the heating of land and water compare?

Physical Science
Many people mistakenly believe that the astronauts who orbit Earth are "above gravity." Earth's mass is 6×1024kg, and its radius is 6.38×106m (6380 km). Use the inverse-square law to find a height above Earth's surface at that the force of gravity on a shuttle is about 89 % ...

Physical Science
Using the formula for gravity, find the force of gravity on a 0.80-kg mass at Earth's surface. (The mass of Earth is 6×10^24kg, and its radius is 6.4×10^6m.).

science
The occurrence of earthquakes along plate boundaries indicates that the 1) plates are stationary 2) earth will eventually break apart 3) earth is shrinking 4) coast of California will break off and slide into the ocean 5) plates are moving

math
radio signal travels 3.00*10^8 meters per seconded. 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*10^7 meters? I am so confused @Mrssue

urgent help please i have an exam !!
A light pole of height 15 meter has a lamp hanging at its top . from a distance 12 meter from the base of the pole , a ball is thrown vertically upwards with velocity 5m/sec . find the rate at which the shadow of the ball on the earth moves away from the base of the pole after...

Math
A light pole of height 15 meter has a lamp hanging at its top . from a distance 12 meter from the base of the pole , a ball is thrown vertically upwards with velocity 5m/sec . find the rate at which the shadow of the ball on the earth moves away from the base of the pole after...

science
The mass of the girl in earth is 24kg. What is her mass and weight in moon if the moon's gravity is 1/6 of the earth' gravity?

physics
In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 532 N, to the ...

Physics
A satellite experiences a gravitational force of 228 N at an altitude of 4.0xE7 m above Earth. What is the mass of this satellite ?

Physics
A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite?

Math
Lined up 6.7 billion people assume that each person occupied 12inches of the line.how many times around earth would they reach

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 entitle ...

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 ...

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

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 ...

Physics
You recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 1700 W/m2 from it’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 it absorbs, what...

Physics
ou recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 2100 W/m2 from it’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 it absorbs, what ...

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 ...

Science
Your journey to the centre of the earth took 64 hours at 100km/h. What was the total distance you traveled??

Math
1. Subtract (4x + 2y) – (8x – 3y). –4x – y 12x – y 12x + 5y –4x + 5y 2. Determine the best name for the quadrilateral. Graphic rectangle rhombus trapezoid parallelogram 3. Which figure has rotational symmetry for an angle of rotation of 270°? graphic graphic ...

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..

Science
what the definition of age range in earth science?

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...

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

Earth Science
Why are boats more efficient than airplanes? They use less fossil fuels to move

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

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 ...

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?

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...

earth science
state the mostly reason for the differences in the weathering rate of the three rock materials

* 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 1960’s EXCEPT: * a. “Don’t trust anyone over 30” b. Woodstock c. Run for ...

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

social studies
1. Some Polynesian islands are ring­shaped coral islands that surround a body of water, or (1 point) copra. coral. atolls. plates. 2. In the mid­1800s, what event played a part in the large increase in British immigration to Australia? (1 point) Aborigines moved to the ...