The Gardiner dam located 100 km south of Saskatoon is largest earth filled dam in the world. Upon it's opening in 1967, engineers discovered that the pressure from lake deifenbaker had moved the clay based structure 200 cm downstream. Since then, then the dam has been ...
Sunday, January 18, 2015 by hinata
The earth has about 80 times the mass of the earths moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the moon,but the moon is ...
Sunday, January 18, 2015 by Tiffany
Please help me to solve this equation. Than you for your time and efforts. Here is the question? Jupiter at its closest approach to earth is about 630,000,000 kilometers, the diameter of Jupiter is 140,000 km, calculate the angular diameter of Jupiter in arc seconds. 206,265 ...
Saturday, January 17, 2015 by Jay
find the distance between the cities. Assume that Earth is a sphere of radius 4000 miles and that the cities are on the same longitude (one city is due north of the other) Dallas, Texas Latitude: 32* 47' 39" Omaha, Nebraska Latitude: 41* 15' 50"
Saturday, January 17, 2015 by Shanu
2 rockets are launched. The first one travels 9000 mph. 15 Minutes later the second launched at 10000 mph. What is the distance at wich both rockets are an equal distance from earth?
Friday, January 16, 2015 by Rells
The rock cycle suggests that A)rocks are always added to Earth's mass. B)rocks are continuously being recycled into different forms. C)rocks disappear from Earth as they go underground. D)rocks always stay in the same form. My answer is A... is that right??
Friday, January 16, 2015 by Channy-Boo
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 ...
Thursday, January 15, 2015 by Jeff
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 ...
Thursday, January 15, 2015 by Amy
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?
Wednesday, January 14, 2015 by Veronica
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...
Wednesday, January 14, 2015 by kymy
Grade 12 Physics
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 ...
Tuesday, January 13, 2015 by Ian
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.
Tuesday, January 13, 2015 by Robby
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?
Monday, January 12, 2015 by Alexis
Science please help thx
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. ...
Monday, January 12, 2015 by Steph
Biology check please
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...
Friday, January 9, 2015 by kat
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 ...
Friday, January 9, 2015 by josh
Physics help - Earths force
Is the force of the earths gravity on the sun stronger, weaker, or the same as the force of the suns gravity on the earth? Explain why the suns attraction affects the motion of the earth more than the earths attraction affects the suns motion. So ...
Thursday, January 8, 2015 by Emily
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 ...
Thursday, January 8, 2015 by vf
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. ...
Thursday, January 8, 2015 by karli
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 ...
Wednesday, January 7, 2015 by Alexis
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 earths surface with an initial speed of 15 m/s . They move along nearby lines and pass without colliding. What is the ...
Wednesday, January 7, 2015 by awash
Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earths 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/...
Tuesday, January 6, 2015 by Emily
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.
Tuesday, January 6, 2015 by John
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
Sunday, January 4, 2015 by NATHAN
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 Shuttles altitude from...
Saturday, January 3, 2015 by Wolf
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if its orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth
Thursday, January 1, 2015 by Karen
Algebra-Check my answer please!
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)
Wednesday, December 31, 2014 by Lucina
Starting from Newtons 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 earths mass. Assume the orbit is a circle. So I calculated this and got 1.0 km/s, I was just wondering ...
Wednesday, December 31, 2014 by Marie
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....
Wednesday, December 31, 2014 by Deyves
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.
Wednesday, December 31, 2014 by komal
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.
Tuesday, December 30, 2014 by Elena
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!!!
Friday, December 26, 2014 by shirly
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, December 23, 2014 by SkatingDJ
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 ...
Monday, December 22, 2014 by Elena
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?
Sunday, December 21, 2014 by Ashley
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...
Saturday, December 20, 2014 by Esmerelda
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 ...
Thursday, December 18, 2014 by Zyere
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?
Tuesday, December 16, 2014 by Pete
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)
Tuesday, December 16, 2014 by Laura ♥
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 ...
Monday, December 15, 2014 by SkatingDJ
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 ...
Monday, December 15, 2014 by Amy
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)?
Monday, December 15, 2014 by kathy
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?
Monday, December 15, 2014 by MG
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...
Sunday, December 14, 2014 by cara
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 ...
Sunday, December 14, 2014 by need help
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 ...
Friday, December 12, 2014 by Prachi
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
Friday, December 12, 2014 by karen
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 ...
Wednesday, December 10, 2014 by Jenn
What would happen to a object if the force of gravity on earth was decreased by half? A. mass would decrease b. its weight would decrease c its density would decrease d. its volume will decrease A certain object has a volume of 25.0 mL and mass of 100g whats the density of the...
Wednesday, December 10, 2014 by becky
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.
Wednesday, December 10, 2014 by m
Science Please help
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 ...
Tuesday, December 9, 2014 by Monkey55
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 ...
Monday, December 8, 2014 by jackie
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.
Saturday, December 6, 2014 by Charlie
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 ...
Friday, December 5, 2014 by Anonymous
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 ...
Friday, December 5, 2014 by lpcruz
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.
Thursday, December 4, 2014 by Anne
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.
Thursday, December 4, 2014 by Jay
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'...
Tuesday, December 2, 2014 by talemi
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
Tuesday, December 2, 2014 by Steve
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 ...
Tuesday, December 2, 2014 by lisa
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?
Tuesday, December 2, 2014 by Anonymous
Science.. Need help ASAP!
How is an area's topography determined? a.By using an area's longitude and latitude b.By using an area's scale c.By using an area's elevation, relief, and landforms * d.By using an area's elevation, longitude, latitude How are lakes and ponds similar? a. ...
Monday, December 1, 2014 by Lelo
Science.. Need help ASAP!
How is an area's topography determined? a.By using an area's longitude and latitude b.By using an area's scale c.By using an area's elevation, relief, and landforms d.By using an area's elevation, longitude, latitude How are lakes and ponds similar? a. ...
Monday, December 1, 2014 by Lelo
Science.. Need help ASAP!
How is an area's topography determined? 1.By using an area's longitude and latitude 2.By using an area's scale 3.By using an area's elevation, relief, and landforms 4.By using an area's elevation, longitude, latitude How are lakes and ponds similar? 1. ...
Monday, December 1, 2014 by Lelo
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?
Monday, December 1, 2014 by Chris
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.
Sunday, November 30, 2014 by Sam
You must submit your response as a file. An objects 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...
Sunday, November 30, 2014 by darlene
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 ...
Friday, November 28, 2014 by Kim