# Earth

Math
Can someone please help me set this up. I didn't quite understand how to do this today. Before leaving Earth, the mass of an astronaut is measured to be 60kg. The astronaut lands on the Moon and measures the acceleration of gravity to be 1.6 m/s2(squared). What would the ...

Science Ms. Sue?
Why did the following change occur? The snow that covered the ground all winter began to melt, temperatures rose, and flowers started to bloom. A. days became shorter B. the Earth tilted away from the sun C. the sun's rays became more concentrated D. Earth completed one ...

physics
Calculate the force of gravity between Earth (mass = 6.0 * 1024 kg ) and the moon (mass = 7.4 * 1022 kg) the average earth-moon distance is 3.8 * x10^8 m

math
At a given time, Saturn was 9.1 x 10 to the 8th miles from the sun and the earth was 9.3 x 10 to the 7th miles from the sun. by what distance is one planet closer to the sun than the other planets?

math
4 PART Your weight on different planets is affected by gravity. An object that weighs 150 pounds on Earth weighs only 56.55 pounds on Mars. The same object weighs only 24.9 pounds on the Moon. A)What percent of an object's Earth weight is its weight on Mars and on the Moon? B)...

astronomy
a light year is a unit of distance most comparable to the distance from earth to what? nearest galaxy nearest star outer solar system

A rocket ship is moving away from the earth after having been fired from a launch pad in Florida. At what point above the earth's surface will the force of gravity be reduced to ½ of its original value? ------------------ Prior to this question I was given the equations to ...

physics
Calculate the force of gravity on a 16 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.

Physics
The rate of motion of the earth at its equator is about 1,038 mi/h because of its rotation. From this information, estimate the earth's circumference using an order-of-magnitude estimate.

Physics
suppose you have a weight of 60 N. if the earth's mass decreased to one fourth its current mass, with no change in radius, then what would you weigh? Can you please explain how I can solve this problem?

Convection cells are created by very hot material deep in the mantle rising, then cooling, sinking again and repeating the cycle. This process occurs because of the uneven distribution of ? Within the earth? Please fill in the question mark with a answer. a. Crystal plates B. ...

Science
What is the main method of heat transfer from the core to the crust of earth? A. Conduction B. Convection C. Radiation

Science
True or False: Tides are caused by the force of inertia from the sun and moon acting on earth.

1. Who most influenced Darwin's idea that life could change slowly over a long period of time? (1 point) Malthus Hutton and Lyell Lamarck livestock breeders and farmers 2. Who most influenced Darwin's idea that some offspring are better suited to survival than others? (1 point...

science
1 which of earths spheres contains most of its mass? A atmosphere B hydrosphere C geosphere* D biosphere 2 erosion and weathering are examples of which types of forces? A constructive forces B destructive forces* C gravitational forces D inertia-related forces 3 which of the ...

physics
weight of a person in newton on mars who weigh 882N on earth ( g = 9.8m/s^2). weight of person on earth who weighs 333N on mars.

physics
weight of a person in newton on mars who weigh 882N on earth ( g = 9.8m/s^2)

science
Is there any stars between the Earth and the Moon?

Physics help - Earths force
Is the force of the earth’s gravity on the sun stronger, weaker, or the same as the force of the sun’s gravity on the earth? Explain why the sun’s attraction affects the motion of the earth more than the earth’s attraction affects the sun’s motion. So is the sun's ...

science
which one of these are not used to power generators? A- wind B- moving water C- hot rocks under earth's surface D- static electricity

sdvfsd
The earth has a specific tilt to it. No the sun appears to move towards the north and the south but through all the time the rays of the sun fall directly at the equator but fall at an inclined level at the other places and hence the seasons change and during revolution on ...

science
1. The Cenozoic Era is also referred to as the? A. Age of Mammals. B. Age of Fish. C. Age of Dinosaurs. D. First Era. 2. When new clay sediment is deposited on top of old beach material, it's known as? A. Transgression. B. Regression. C. Progression. D. Aggression. 3. Small ...

physics
A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to gravity at the surface ...

mechanics and heat
At the same instant that a 0.5 kg ball is dropped from 25 m above earth , a second ball , with a mass of 0.25 kg , is thrown straight upward from earth’s surface with an initial speed of 15 m/s . They move along nearby lines and pass without colliding. What is the velocity ...

Physic~~~
Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. So I was doing this and I got stuck here; gs = G*Ms/Rs² = G*(95Me)/(9²Re²) = ge*(95/9²) = 1.173*ge...

Science/earth
How does money and politics affect the public claims about global warming? Pick on news source (news company, think tank, or university) and investigate its credibility.

physics
What is the distance from the earth's center to a point where your weight would be 1/25 of what you weigh at the surface?

Physics
a 4 kg object is taken to a planet that has 3 times the mass of earth and 1/2 the radius of earth. On this planet the mass of the object will be most nearly.. A. 12kg B. 3kg C. 48kg D. 4kg E. 24 kg

Physics, Math, Aerospace, Engineering
A de-orbit burn, similar (but not the same) to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 99.1 meters per second will be used to decrease the Shuttle’s altitude from ...

^NeEd HeLp^
What iz d. location ov d. MOON with respect 2 d. EARTH? that iz, iz d. MOON inside or outside ov d. EARTH?

Rocket Science
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth

earth science
the Julian calendar is the calendar we currently use. True or false. my guess is true

earth science
one reason the moon might be a better place than earth to study the universe is there is almost no atmosphere. True or False MY guess is false

The Great Galaxy in Andromeda is about 2200000 light years from Earth. Light travels 5900000000000 miles in a year. How many miles is the Great Galaxy in Andromeda from Earth? I got 1.298* 10^20 miles. (This is the exponents unit)

Physics
Starting from Newton’s law of universal gravitation, show how to find the speed of the moon in its orbit from the earth-moon distance of 3.9 × 108 m and the earth’s mass. Assume the orbit is a circle. So I calculated this and got 1.0 km/s, I was just wondering if anyone ...

Physics
What is the orbital velocity of the Earth around the Sun, assuming the Earth takes a perfectly circular orbit around the Sun? What would be the centripetal acceleration of the Earth around the Sun? (I have no clue :() From my textbook I found out that Earth has a mass of 5....

physics
what will be the centipetal acceleration on a man whose mass is 80 kg,when resting on a ground at the equator if the radius of the earth'R' is 6.4x10 power 6 meter.

earth science
During the summer _________ in India, wet air from the Indian ocean brings heavy rain to India.

earth science
air pollution in pennsylvania causes ______ in new england because the wind blows the pollution into new England. can someone please help, I cant find this anywhere.

math
the distance from the sun to earth is about 1.5x10^11 meters. suppose light travels at a speed of 3x10^8 meters per second. About how long does it take light from the sun to reach earth? PLEASE HELP!!!

SCIENCE
The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE

EARTH SCIENCE
Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES

Earth science
TRUE OR FALSE The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE Isobars help meteorologists find fronts on weather maps. MY GUESS: FALSE A CLOUD IS A COLLECTION OF WATER ...

phys
While spinning in a centrifuge, a 70.0 kg astronaut experiences an acceleration of 5.00 g, or five times the acceleration due to gravity on the earth. What is the centripetal force acting on her?

Physics~
The moon's gravity is one-sixth that of the earth. What is the period of a 0.25 m long pendulum on the moon?

physics
A person can jump to a height of 1.5m on surface of earth. Find the velocity with which he jumps.

English--Edgar Allen Poe
I need some help with some questions about an excerpt from "The Tell-Tale Heart" by Edgar Allen Poe: "True! --nervous --very, very dreadfully nervous I had been and am; but why will you say that I am mad? The disease had sharpened my senses --not destroyed --not dulled them. ...

Algebra
The half-life of a specific radioactive compound is 20 years. The equation used to model this half-life is y = 5 1/2(t/20) where t represents time. Currently, there are 5 pounds of this compound 15 feet below the earth's surface. When will there only be 4 pounds of this ...

Geology
The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

math
A community group purchased 72 cedar tree and spruce tree seedlings to plant for an Earth Day project. The number of cedar trees was twice the number of spruce trees. How many of each type of tree seedling did the group purchase. (i think it is an equation question)

astronomy
Find an exact expression for the magnitude of the tidal force applied by Earth to our rock of mass m

science
why is it rare for the soft parts of an organism to become a fossil? a) the soft parts take a long time to decay b) the soft parts can be eaten by animals***** c) the soft parts cannot be buried in sediment d) the soft parts form petrified fossils which of the following terms ...

Society and Tech
According to Joel Cohen, head of the laboratory of populations at Rockefeller University, the earth's carrying capacity for human populations depends upon: A. reducing meat consumption. B. eliminating social barriers to innovation. C. individual choices concerning consumption ...

astro
The intensity of an object is related to the distance d to the observer by the equation (I1/I2) = (d2/d1)2. If the apparent magnitude of the Sun seen from Earth has a value of -26.74, what is the apparent magnitude of the Sun seen from Neptune (30AU from the Sun)?

Science
The speed of light is 3 x 10 to the 8th power meters per second. If the sun is 1.5 x 10 to the 11th power meters from earth, how many seconds does it take light to reach the earth?

physics
radius R of the orbit of a geosynchronous satellite that circles the earth. (Note that R is measured from the center of the earth, not the surface.) You may use the following constants: The universal gravitational constant G is 6.67×10−11N⋅m2/kg2. The mass of the ...

physics
A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 181 km away. The radar antenna is pointing upward at an angle of 66.2 ° above the ground. Find (a) the x and (b) the y components (in km) of the position ...

P.E. help
Non-renewable resources mean it takes a longer time for the earth to produce it than the rate at which we use it. True False Is the answer True?

astronomy
What is the semi-major axis of an object that is in 2:1 mean motion resonance with Earth

physics
prove that the moon complete its one revolution around the earth in (27.3) days.distance of moon from the surface of the earth is (380000km).

Science
An airplane with a speed of 27.4 m/s is climbing upward at an angle of 48° counterclockwise from the positive x axis. When the plane's altitude is 860 m the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...

math
There were 845 million facebook users in 2011 and 608 million in 2010. What is the percent since Facebook is now used by 1 in every 13 people on earth? is the answer:7.69% 1 x x - - 13 100

geometry
Satellite Explorer VII, with a = 4465 and b = 4462, and with the center of the Earth being at one of the foci of the ellipse. Assuming the Earth has a radius of about 3960 miles,graph both the orbits of Explorer VII and earths surface on the same axis if the average radius of ...

science
Lava flows from cracks in the earth and hardens into basalt, what type of rock result, is the answer sedimentary

science
Heat and pressure change rock inside the earth crust into gneiss. What type of rock result. Is the answer igneous

Physics
Knowing the temperature at the surface of the Earth to be 72 F, find the temperature at the surface of Venus.

science
By studing rock layer scientist can learn about changes in earth formation and climate. True or false. Is the anser true

English language arts IV
Which words should be capitalized in the sentence " Hawaii has some of the most beautiful beaches on earth"

physics
Consider a system of a cliff diver and the earth. The gravitational potential energy of the system decreases by 21,000 J as the diver drops to the water from a height of 32.0 m. Determine her weight in newtons.

Some of the oldest rocks ever found have been estimated to be about 3.5 billion years old. Is it likely that these rocks were present when Earth was first formed? No, this rock is probably just a sedimentary rock that was formed by much younger igneous rocks. Yes, the oldest ...

physics help!
The earth attracts a large ﬂying bug toward its center with a force of 0.10 Newtons. With what force does the bug attract the earth itself? 1. 1.0 N 2. 0.10 N 3. Trillions of Newtons 4. 10 N 5. We need the mass of the bug. 6. Zero; the earth attracts the bug, not the ...

physics
The earth attracts a large ﬂying bug toward its center with a force of 0.10 Newtons. With what force does the bug attract the earth itself?

Physics
1) Determine the force of gravitational attraction between the earth(m=5.98*10^24kg) and a 70-kg physics student if the student is in an airplane at 4.950 meters above the earth's surface.

Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20 x 104 km/hr. How high does it go?

physics
When an earthquake occurs, two types of sound waves are generated and travel through the earth. The primary, or P, wave has a speed of about 8.0 km/s and the secondary, or S, wave has a speed of about 4.5 km/s. A seismograph, located some distance away, records the arrival of ...

Algebra
Please help me to to solve this quadratic equation word problem. Here is the question: Studying Microgravity. NASA'S Glen Research Center in Cleveland, Ohio, has a 435-foot drop tower that begins on the surface and descends into Earth like a mineshaft. How long will it take a ...

Physics
Help!! I would greatly appreciate help with this question. Consider a pulse of laser light aimed at the Moon that bounces back to Earth. The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56s.

physics
If the acceleration due to gravity on the earth is 9.8 m/s2, what is the acceleration due to gravity on Rams?

Algebra
Studying Microgravity. NASA'S Glen Research Center in Cleveland, Ohio, has a 435-foot drop tower that begins on the surface and descends into Earth like a mineshaft. How long will it take a sealed container to fall 435 feet? Round to the nearest tenth of a second.

math
The ratio of an object's 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?

physics
A 0.80-m aluminium bar is held with its length parallel to the east-west direction and dropped from a bridge. Just before the bar hits the river below, its speed is 22 m/s, and the emf induced across its length is 5 X 10-4 V. Assuming the horizontal component of the earth's ...

physics
A man weighs 750.0 N on Earth at what altitude will he weigh 187.5 N?

Earth Science
Which of the following statements correctly describes the asthenosphere? 1- it is thin cold and rigid layer 2- it is the source of the earth's heat 3- it permits plate motion 4- it occurs only near subduction zones My answer is 1

science
Sarah wants to use a model to get an idea of how far away the stars are. She uses a marble to represent the Earth, and she places a basketball 1 m away to represent the Sun, which is the nearest star. If Sarah wishes to keep the distances between objects in her model at an ...

Physics
A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

physics
You test a moon buggy on earth. When the buggy hits a bump, it oscillates up and down on its springs with a period of 4 seconds. Will the period be the same when buggy is used on the moon?

check my science hw please.
26. In the last few centuries, the number of species becoming extinct on Earth has A.decreased dramatically B. decreased slightly. C. increased slightly. D.increased dramatically I think it should be C.

algebra
You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the formula: W = (190&#...

Pyhsics
A) On planet X, an object weighs 19.2 N. On planet B where the magnitude of the free-fall acceleration is 1.17 g (where g = 9.8 m/s2 is the gravitational acceleration on Earth), the object weighs 34.9 N. The acceleration of gravity is 9.8 m/s2 . What is the mass of the object ...

physics
Using sidereal navigation, a pilot flies due south for one hour then due north one hour and lands about 180 miles west of where he started. At what point on Earth is he?

english
The old fisherman floated on the Black Sea, boat bobbing from side to side as a frigid wind sliced through his threadbare sweater. Though the fisherman and his wife were struggling to survive without much money, he thought happily of the meager but delicious dinner of homemade...

physics
Calculate the radius of a “super- Earth” with 10 times the mass of Earth, using Earth data as a starting point.

INTSCIENCE
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

int.science
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False

Earth Science
Describe the difference in evolution between a supercell that develops in an environment with unidirectional wind shear and a supercell that develops in an environment with veering winds. What is causing this difference in evolution? THANKS!!

algebra
the ratio of the weight of an object on jupiter to its weight on earth is 8 to 3. how much would a 100 pound person weigh on Jupiter? i`ll tell you the answer when am done solving so you can check if am right

Biology
I think this is a shot in the dark, but worth a try. I have the Biology: Life on Earth by Audesirk, Audesirk & Byers 10th edition bought used online, apparently there are some pages missing in the book, so I can't do my homework, if anyone has the book could, you help me by ...

science
As an object get farther from earth is A. its weight increase B.it weight decrease C. it mass decrease D. it weight remains the same I am not sure but is it A(or b)

Physics
A distant planet has a mass of 0.6400 ME and a radius of 0.9000 RE. What is the ratio of the escape speed from this planet to the escape speed from the earth?

Earth Science - NEED HELP QUICK
What is the thickness of the layer from 1000 - 850 mb if the mean temperature of the layer is 2 C? From what it says in my textbook it seems as if mb = hPa so all you do is 850 - 1000 = -150 hPa but I am pretty sure that is wrong because what do you do with the temperature?? ...