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September 23, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
Wednesday, February 15, 2012 at 9:18pm

physics
Assume that the Earth is spherical and recall that latitudes range from 0° at the Equator to 90° N at the North Pole. Consider Dubuque, Iowa (42.50° N latitude), and Guatemala City (14.62° N latitude). The two cities lie on approximately the same longitude. Do ...
Wednesday, February 15, 2012 at 5:42pm

physics
An apple weighs 2 KG. The earth exerts a force of 20 Newtons on the apple. How fast does the apple fall ? ( 1 Newton = kg/m/s2)
Wednesday, February 15, 2012 at 3:39pm

physics
a satelitte is in orbit about the earth. its orbital radius 7.47x10^7. mass of satelitte 6862kg & mass of earth 5.97x10^24kg determine the orbital speed in mi/s 1mi/s=1609m/s
Wednesday, February 15, 2012 at 10:24am

Math
An airplane leaves the airport and flies due west 170 miles and then 240 miles in the direction 200°30'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?
Tuesday, February 14, 2012 at 4:00pm

Earth Science
What is the landform of the Grand Teton?
Tuesday, February 14, 2012 at 9:35am

SCIENCE
Determine the mass of a person on the moon whose mass on Earth is 70 kg Determine the weight of a person on the moon whose weight on Earth is 148 lbs. How is the mutual gravitational force affected by changing the separation distance between two 1.0 kg masses if the distance ...
Sunday, February 12, 2012 at 11:18pm

Physics
An image of the moon is focused onto a screen using a converging lens of focal length f= 35.3 cm. The diameter of the moon is 3.48×106 m, and its mean distance from the earth is 3.85×108 m. What is the diameter of the moon's image?
Sunday, February 12, 2012 at 4:19pm

physics
A satellite is in a circular earth orbit that has a radius of 6.63E+6 m. A model airplane is flying on a 16.4 m guideline in a horizontal circle. The guideline is nearly parallel to the ground. Find the speed of the plane such that the plane and the satellite have the same ...
Sunday, February 12, 2012 at 3:56pm

science
Given that Antarctica is roughly semicircular with a radius of 2000 km and has an average ice thickness of 3000 m. a) How many km3 of ice does Antarctica contain? b) Assuming all the ice melts, how much will this raise sea level (ignoring that the Earth has curvature and ...
Sunday, February 12, 2012 at 3:35pm

physical
Consider a pulse of laser light aimed at the moon that bounces back to earth. The distance between Earth and Moon is 3.8 x 10 (small eight above) m. Show that the round-trip time for the light is 2.5 s.
Sunday, February 12, 2012 at 11:41am

physics
for a sateliite to have a speed of 7400 m/s how far must it be in metres above the earth's surface
Saturday, February 11, 2012 at 7:01pm

physics
The Earth orbits the Sun once per year.What is the centripetal force keeping the Earth in orbit? T = 1 year (convert to seconds) r = 1.5e+11 meters m = 6e+24 kg
Saturday, February 11, 2012 at 5:55pm

physics
Suppose all the people of the Earth go to the North Pole and, on a signal, all jump straight up. Estimate the recoil speed of the Earth. The mass of the Earth is 6 1024 kg, and there are about 6 billion people (6 109). Take the average mass of a person to be 74 kg and the ...
Friday, February 10, 2012 at 8:40pm

English
Writeacher, I wanted to thank you for all what you have done for me and for my professional growth. We have worked really hard on the project over the last few days (though I was in bed with flu!) By the way, I used your suggestion as a title for the whole project. If the ...
Friday, February 10, 2012 at 4:26am

earth
An object on earth weighs 6 times what it would weigh on the moon. An object weighs 72 pounds on earth. Write multiplication equation to find the weight of object on moon.
Friday, February 10, 2012 at 2:31am

Physics
What is the frequency of the electromagnetic radiation from outer space that reaches the earth with a wavelength of 1 x 105 m, and a velocity of 1 x 105 m/s?
Thursday, February 9, 2012 at 8:23pm

English 7 HW Assignment (PLZ read!)
English HW: List the title of one song that includes on example of determination. Include the artists name, and write down the section of lyrics that provide an example of determination. My English teacher said that it could be a love song or a i don't umm... a sad song. ...
Thursday, February 9, 2012 at 6:17pm

English
One last thing. I varied this sentence since we are going to involve students from different third classes.I don't know how to express the second part. Pupils taken from different (or various) tenth classes will be involved in the project since the scientific project's...
Thursday, February 9, 2012 at 1:42pm

earth space science
Potassium-40 has a half-life of approximately 1.25 billion years. Approximately how many years will pass before a sample of potassium-40 contains one-sixteenth the original amount of parent isotope?
Thursday, February 9, 2012 at 9:53am

English
Writeacher, thank you very much! Here are some sentences I varied and I urgently need you to check. I need to clarify those things. Could you please help me express sentence 1? We need to impress the EU to support the project!!! Rationale 1)The preparatory meeting made clear ...
Thursday, February 9, 2012 at 4:09am

trig
if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
Wednesday, February 8, 2012 at 9:11pm

physics
how do scientist know that the chemical elements here on earth are the same as on the planets in space and not some different elements
Wednesday, February 8, 2012 at 7:56pm

physics
A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
Wednesday, February 8, 2012 at 7:51pm

Physics
How far above the surface of the Earth does an object have to be in order for it to have a weight which is 0.53 times the same weight as it would have on the surface of the Moon? (Ignore any effects from the Earth's gravity for the object on the Moon's surface or from ...
Wednesday, February 8, 2012 at 7:41pm

Science/Math/HElP
Science- A 25N object is 3 meters up. How much potential energy does it have? our teacher said that the formula for finding out potential energy is PE = Mass * Gravity * Height. The gravity on Earth is always 9.8, but my problem is that instead of mass the object is measured ...
Wednesday, February 8, 2012 at 7:01pm

Physics
An airplane with a speed of 76.8 m/s is climbing upward at an angle of 48° with respect to the horizontal. When the plane's altitude is 560 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point of...
Wednesday, February 8, 2012 at 6:27pm

Physics
A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
Wednesday, February 8, 2012 at 5:12pm

College Algebre
Here is the math problem: The height of an object in free fall, or otherwise thrown into the air near the earth's surface, with initial vertical velocity v0 in feet per seconds, and from the initial height h0 in feet, at any given time t in seconds is given by the equation...
Wednesday, February 8, 2012 at 11:58am

Math
The weight of an object on the planet Mercury is about 2/5 the weight of that object on the Earth. An object that weighs 30 pounds on Earth would weigh how many pounds on Mercury? Need solution because I think it is 7.5 but my parents think the answer is 12. Thank you.
Tuesday, February 7, 2012 at 8:16pm

Math
The weight of an object on the planet Mercury is about 2/5 the weight of that object on the Earth. An object that weighs 30 pounds on Earth would weigh how many pounds on Mercury?
Tuesday, February 7, 2012 at 8:05pm

Physics
Given: G = 6.67259 × 10−11 Nm2/kg2 . A 602 kg geosynchronous satellite or- bits a planet similar to Earth at a radius 1.98 × 105 km from the planet’s center. Its angular speed at this radius is the same as the rotational speed of the Earth, and so they ...
Tuesday, February 7, 2012 at 12:31pm

earth
At what height above the earth surface will an austranouts experience only half the gravitation that he experience on earth
Tuesday, February 7, 2012 at 12:34am

physics
How does your mass on Earth compare to your mass on Mars?
Monday, February 6, 2012 at 10:25pm

science
A space probe of the surface of Mars sends a radio signal back to the Earth, a distance of 3 x 1010 km. Radio waves travel at the speed of light (3.00 x 108 m/s). How far away is the space probe? How many seconds does it take for the signal to reach the Earth? How many hours ...
Saturday, February 4, 2012 at 11:40pm

physics
A 610 kg satellite orbits at a distance from the Earth's center of about 5.3 Earth radii. What gravitational force does the Earth exert on the satellite?
Saturday, February 4, 2012 at 10:21pm

physics
A satellite orbits at a distance from the Earth's center of about 4.40 Earth radii and takes 13.0 hours to go around once. What distance (in meters) does the satellite travel in one day?
Saturday, February 4, 2012 at 9:40pm

College Physics
On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.90 feet tall on earth. She lands on planet Z and is measured to be 94 foosi tall. Her partner Rachael is 88 foosi tall. How tall is Rachael on Earth?
Saturday, February 4, 2012 at 6:59pm

physics
An engine draws water from a depth of 10 m from earth at aspeed of 2m/s at arate of 10 kg/10 s. What is the power of the engine?
Friday, February 3, 2012 at 11:24am

physics
Can water,air and earth conduct electricity? If yes, then explain how they conduct electricity.
Friday, February 3, 2012 at 2:48am

Astronomy
Assume that right now the Moon is full, Mercury is at superior conjunction, Venus is at greatest western elongation, and Mars is at opposition. Draw a simple sketch of the solar system, showing the relative positions of the Sun, Earth, the Moon, Mercury, Venus and Mars. Draw ...
Thursday, February 2, 2012 at 11:55pm

Earth Science
Can you help me find how many hours are received by these degrees of latitude during the winter (see details)? North Pole = 0 hrs of daylight Equator = 12 hrs of daylight South Pole = 24 hrs of daylight 66.5 degrees north = ? 23.5 degrees north = ? 23.5 degrees south = ? 66.5 ...
Thursday, February 2, 2012 at 10:43pm

science
The pull of gravity keeps the Moon in orbit around Earth. The distance between the Earth and Moon is about 380,000 kilometers. A crew of astronauts leaves Earth on a Monday and lands on the Moon on a Thursday. They land on the side of the Moon facing away from the Earth. On ...
Thursday, February 2, 2012 at 6:05pm

Physics
A plane is headed east with an air speed of 294.0 m/s. The wind blows southeast at 42.0 m/s. Find the velocity of the plane relative to the earth.
Thursday, February 2, 2012 at 5:02am

Physical Science
The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.
Wednesday, February 1, 2012 at 1:22pm

Physical Science
A man has a mass of 70 kg. A) What would his weight be on Jupiter which as an acceleration of gravity of 25m/s^2? B) What would the mass of a person have to be in order for him to weigh that amount on earth?
Wednesday, February 1, 2012 at 1:20pm

physics
calculate the force of gravity between earth (mass = 6.0 x 1024kg) and the moon (mass = 7.4 x 1022 kg). the average Earth-moon distance is 3.8 x 108 m.
Wednesday, February 1, 2012 at 1:37am

Physical Science
The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.
Tuesday, January 31, 2012 at 5:07pm

Physical Science
A man has a mass of 70 kg. A) What would his weight be on Jupiter which as an acceleration of gravity of 25m/s^2? B) What would the mass of a person have to be in order for him to weigh that amount on earth?
Tuesday, January 31, 2012 at 4:44pm

science
if a globe has a diameter of 0.5 meters write the globes scale as a ratio. What distance on earth would 1 centimeter on a globe represent
Tuesday, January 31, 2012 at 4:31pm

physics
A space traveler weighs 620 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
Monday, January 30, 2012 at 8:24pm

Physics
A spaceship lifts off from the Earth with constant acceleration. 9 seconds into the flight, a small piece of the ship breaks off and falls back to the Earth. If the piece hit the ground 11.5 seconds after breaking off from the spaceship, what is the spaceship’s ...
Sunday, January 29, 2012 at 3:08pm

physical
a rocket moves through outer space at 11,000 m/s at this rate how much time would be required to travel the distance from earth to moon which is 380,000 km
Saturday, January 28, 2012 at 6:59pm

Physics
The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below? Please check answer, if I am doing it incorrectly help me set it up. the last person who...
Saturday, January 28, 2012 at 4:57pm

PHYSICS
The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below?
Friday, January 27, 2012 at 10:11pm

Physics
A 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is 6.0 × 1024 kg. Show all your ...
Friday, January 27, 2012 at 6:11pm

physics
Calculate the force of gravity on a 10 kg mass if it were 6.4x10^6 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
Thursday, January 26, 2012 at 9:41pm

physical science
by what means can earth scientists predict discharge of a stream afeter a rainstorm?
Thursday, January 26, 2012 at 6:40pm

physic
At which point between earth and sun, the intensity of the gravity field of the earth and sun are equal, if the mass of Earth is 6 x 10 to power 24 kg, the mass of the sun is 2 x 10 to power 30 kg while the distance between them is 15 x 10 to power 7 km?
Thursday, January 26, 2012 at 6:48am

physics
A dime is 1.8 cm in diameter. Earth's moon is 3.844´1010 cm from Earth and has a diameter of 3.76´108 cm. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full moon?
Wednesday, January 25, 2012 at 9:20pm

physics
A place-kicker kicks a football at an angle of è = 41.5° above the horizontal axis, as the figure below shows. The initial speed of the ball is v0 = 26 m/s. Also assume that the ball is kicked on the moon instead of on the earth. The acceleration due to gravity on ...
Wednesday, January 25, 2012 at 11:21am

trig
city A is 300 miles directly north of city B assuming the earth to be sphere of radius 4000 miles determine the difference in latitude in degrees of the two cities
Tuesday, January 24, 2012 at 9:30pm

Physics
Assume that you havea mass of 65 kg. I you are standing on the surface of Earth, What is the force of gravitational attraction between you and the earth?
Tuesday, January 24, 2012 at 7:45pm

science
How could measuring the orbit of a comet help scientists understand when it will next be visible from earth?
Tuesday, January 24, 2012 at 6:17pm

science
how could measuring the orbit of a comet help scientists understand when it will next be visible from earth
Tuesday, January 24, 2012 at 8:01am

earth
Two rockets are orbiting the earth, traveling in perfect circles with equal radii. The velocity of rocket A is twice that of rocket B. What can be said about their respective centripetal accelerations?
Monday, January 23, 2012 at 8:54pm

Science
Dingtu can lift a weight of 60 kg on the earth. How much will he be able to lift when on moon? A. 60 Kg B. 10 Kg C. 360 Kg D. 120 Kg
Monday, January 23, 2012 at 1:17pm

physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and position at the end of ...
Sunday, January 22, 2012 at 2:48pm

science
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation for the force of ...
Sunday, January 22, 2012 at 11:43am

science
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground?
Sunday, January 22, 2012 at 11:40am

physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and position at the end of ...
Sunday, January 22, 2012 at 1:21am

Physics
How can one solve this equation for t? Y = 1.3 + 18.8 t - (g/2) t^2 = 0 (Assume g = 9.8 m/s^2, the value on Earth)
Saturday, January 21, 2012 at 9:56pm

Math
How can one solve this equation for t with decimals? Y = 1.3 + 18.8 t - (g/2) t^2 = 0 (Assume g = 9.8 m/s^2, the value on Earth)
Saturday, January 21, 2012 at 4:48pm

physics
A de-orbit burn, similar 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 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205 miles to 60 ...
Friday, January 20, 2012 at 6:55pm

earth
Body on surface of earth weighs 400 lb. Radius of earth is about 4000miles. If same body were placed on 4000 mile high tower, what would its weight be
Friday, January 20, 2012 at 6:19pm

physics
what is the magnitude of the centripetal force acting on the earth as it orbits the sun assuming a circular orbital speed of 3.00 X 10^4 meters per second
Thursday, January 19, 2012 at 10:36pm

Physics
How do you calculate the earth's gravitational pull on astronauts?
Thursday, January 19, 2012 at 12:18pm

science
A person 12,000 km from the center of earth has a mass of 70 kg and weighs 182 N. What is the acceleration due to gravity at this altitude?
Wednesday, January 18, 2012 at 8:25pm

Astronomy 1010
The International Space Station orbits approximately 350 km above the Earth's surface. (The Earth's radius is 6,378 km.) Are the astronauts beyond the pull of Earth's gravity? Explain your reasoning.
Tuesday, January 17, 2012 at 9:19pm

Astronomy 1010
The International Space Station orbits approximately 350 km above the Earth's surface. (The Earth's radius is 6,378 km.) Are the astronauts beyond the pull of Earth's gravity? Explain your reasoning.
Tuesday, January 17, 2012 at 8:25pm

Earth Science
True or false? ------------------------- Although there is scientific evidence and many scientific theories about the origin of the universe, how it all happened remains a question. Which statement is true? ------------------------- The perfect cosmological principle is the ...
Tuesday, January 17, 2012 at 12:06pm

Literacy
Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D
Tuesday, January 17, 2012 at 11:24am

Probability
Automated chemical synthesis of DNA has made it possible to custom-order moderate length DNA sequences from commercial suppliers. Assume that a single nucleotide weighs about 5.6 X 10^-22 grams and that there are four kinds of nucleotides. If you wish to order all possible DNA...
Monday, January 16, 2012 at 3:00pm

Physic
The moon orbits the earth a a speed of 1.02 Kilometers per second. Use dimensional analysis to convert this speed into miles per hour. is the answer .28 m/s????
Saturday, January 14, 2012 at 10:37pm

PHYSIC
THE MOON ORBITS THE EARTH AT A SPEED OF 1.02 KILOMETERS PER SECOND. USE DIMENSIONAL ANALYSIS TO CONVERT THIS SPEED INTO MILES PER HOUR.
Saturday, January 14, 2012 at 10:15pm

Physics
Calculate the force of gravity on a 2 kg mass at Earth’s surface. The mass of Earth is 6 * 10 ^24 kg, and its raidus is 6.4 * 10 ^ 6.
Saturday, January 14, 2012 at 3:06pm

physics
Calculate Earth’s gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth’s surface.
Saturday, January 14, 2012 at 1:20pm

earth
what is the chemical formula of chock?
Friday, January 13, 2012 at 9:36pm

PHYSICS
Find the period time of the moon from the following values, R=6400km,the distance between the earth and the moon=384000km,g=9.8m/s2
Friday, January 13, 2012 at 11:11am

Maths
The earth is approximately a sphere of average diameter 12740km. The smallest of the planets is Mercury, also spherical, with average diameter 4840km. Determine what percentages (to the nearest hundredth) the volume and surface area of Mercury are of those of the Earth.
Thursday, January 12, 2012 at 4:13pm

Precalculus
A nautical mile equals the length of arc subtended by a central angle of 1 minute on a great circle on the surface of Earth. If the radius of Earth is taken as 3960 miles, express 1 nautical mile in terms of ordinary, or statute, miles.
Thursday, January 12, 2012 at 12:39pm

physics
The earth is moving around the sun,now a satalite with its escape velocity thrown out from the earth,if the earth will stop then escape velocity of the satalite will same or not??
Wednesday, January 11, 2012 at 9:29pm

physics
A communications satellite is in an orbit that is 3.1 multiplied by 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.6 ...
Wednesday, January 11, 2012 at 9:11pm

physics
2. 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
Wednesday, January 11, 2012 at 9:23am

Math
It takes 5 1/3 minutes for light from the sun to reach earth. The Moon is closer to earth, so it,s light reaches earth faster about 5 19/60 minutes faster than from the sun. How long does light from the moon take to reach earth.
Tuesday, January 10, 2012 at 8:44pm

Math
Make a picture of: a model of the earth, a stop sign, a dinner plate and a clock. Which one doesnt belong? Why?
Tuesday, January 10, 2012 at 8:24pm

calculus
A projectile is shot upward from the surface of the Earth with an initial velocity of 120 meters per second. What is its velocity after 5 seconds?
Monday, January 9, 2012 at 8:14pm

geometry
what is the maximum broadcasting radio from a radio tower 1800ft tall the radius of earth is 3960 miles and you can assume thtat the ground around the tower is nearly flat
Monday, January 9, 2012 at 7:27pm

Maths
A satellite takes 93.8 minutes to orbit the earth. If the diameter of the earth is 12740km approximately and the satellite is at a height of 32km above the earth's surface, find the average speed of the satellite in km/h Working out please
Monday, January 9, 2012 at 5:06pm

Physics
1. If a mass on a spring and a pendulum have the same period on the moon where the gravity is about 1/6 of its value on the Earth, which one will run faster on the Earth? a. The mass on the spring. b. The pendulum. c. They will both run the same. d. It depends on which one has...
Monday, January 9, 2012 at 4:10pm

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