Wednesday
October 22, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

Post a New Question | Current Questions

Science
The time period of simple pendulum in earth surface is T. then time period in satellite is
Wednesday, July 2, 2014 at 2:15am

physics
1. what happens to the force required for an object to maintain circular motion if the period is halved (goes twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered 2. In a pulley problem involving an inclined plane: a) ...
Tuesday, July 1, 2014 at 12:17pm

astronomy
You are a pulsar astronomer, and you have been measuring the pulses from a particular milli-second pulsar for several hundred days. You find that they do not arrive at regular intervals - sometimes they arrive a little early and sometimes a little late. You assume that this is...
Sunday, June 29, 2014 at 6:56am

physics
The velocity of a ball changes from ‹ 8, −5, 0 › m/s to ‹ 7.88, −5.28, 0 › m/s in 0.04 s, due to the gravitational attraction of the Earth and to air resistance. The mass of the ball is 140 grams. I calculated the acceleration and got <-3,-7,...
Saturday, June 28, 2014 at 6:14pm

Physics multiple choice
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered my answer: c 2. Which is true a) the ...
Friday, June 27, 2014 at 12:05pm

Physics
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as fast around the circle)? a) force doubles b) force quadruples c) force is halved d) force is quartered my answer: c 2. Which is true a) the ...
Thursday, June 26, 2014 at 10:35pm

Physics
A hydrogen atom is at the earth's surface. The electron and proton in the atom are separated by a distance of 5.29x10^-11m. What is the ratio of the magnitude of the electrical force exerted by the proton on the electron to the weight of the electron?
Thursday, June 26, 2014 at 10:30am

maths
Here on earth it is true,yesterday is always before today;but there is a place where yesterday always follows today.Where?
Thursday, June 26, 2014 at 3:21am

ALGEBRA
The force of gravity on Earth is 6 times greater than on the moon. As a result, objects weigh 6 times as much on Earth as they do on the moon. A scientific instrument weighs 34 pounds on the moon. How much does the instrument weigh on Earth?
Wednesday, June 25, 2014 at 8:55am

physics
A baseball pitcher throws a baseball horizontally at a linear speed of 50.6 m/s. Before being caught, the baseball travels a horizontal distance of 24.9 m and rotates through an angle of 54.5 rad. The baseball has a radius of 3.43 cm and is rotating about an axis as it travels...
Monday, June 23, 2014 at 11:12pm

art history
1. During the ______, the writings and art of Ancient Greeks were rediscovered. 2. ______ is the study of religious faith, practice and experience. 3. Renaissance thinkers promoted _______, individualism, and secularism. 4. _______ is the idea that people should be more ...
Monday, June 23, 2014 at 10:46pm

calculus
the weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. if a person weighs 180 pounds on the surface of the earth and the radius of the earth is 3900 miles, what will the person ...
Monday, June 23, 2014 at 7:48pm

PHYSICS
'if diametre of earth is reduced to half mass remains constant what is then duration of day and night'
Friday, June 20, 2014 at 11:03am

marketing
What challenges do specialized magazines such as Mother Earth News face hen trying to entice advertisers?
Wednesday, June 18, 2014 at 7:10pm

physics
If the change in the value of 'g ' at a height 'h ' above the surface of earth is the same as at a depth 'x ' below it. When both x and h are much smaller than the radius of the earth. The relation between x and h is?
Wednesday, June 18, 2014 at 2:04am

Physics
Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much kinetic energy ...
Wednesday, June 18, 2014 at 12:12am

Physics
Consider problem U concerning the geosynchronous satellite of mass 50 kg. It orbits at a radius of 42,300 km with a speed of 3076 m/s. a) How much energy is needed to lift the satellite from the earth's surface (Re=6,370 km) up to that radius? b) How much kinetic energy ...
Tuesday, June 17, 2014 at 11:05pm

physics
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 2.60 ...
Tuesday, June 17, 2014 at 9:02pm

math
e. Felix Baumgartner is a daredevil famous for breaking the sound barrier during a freefall on October 14, 2012. Aided by a weather balloon, he climbed to a height of 128,100 feet. More than 24 miles in the air, he was so high up that he could see Earth’s curvature. He ...
Tuesday, June 17, 2014 at 10:54am

PHYSICS
IF EARTH WERE TO ROTATE FASTER THAN ITS PRESENT SPEED THEN WEIGHT PF OBJECT WILL DECREASE AT EQUATOR BUT REMAIN UNCHANGED AT POLES why?
Friday, June 13, 2014 at 2:09pm

Math
Ms. Sue please help! A radio signal travels at 3.00 • 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 • 10^7 meters? Show your work.
Tuesday, June 10, 2014 at 6:23pm

Physics
Help please A wire carries a current of 5.2 A from east to west through a 6.0 m section of wire in the earth's magnetic field of 1 × 10^-5 T at a location where the magnetic field points south. What is the magnitude of the magnetic force acting on the wire? 3.1 &...
Monday, June 9, 2014 at 12:41pm

physics
Two satellites are orbiting the Earth in stable circular orbits. Satellite A has a mass m and is located at a distance 2r from the center of the Earth. Satellite B has a mass 2m and is located at a distance r from the center of the Earth. Which one of the following statements ...
Sunday, June 8, 2014 at 9:35pm

physics
A box containing supplies is vertically lowered at constant speed by a rope from a hovering helicopter. Consider the following forces that arise in this situation: force 1: the force of the earth pulling on the box force 2: the tension force acting on the box force 3: the ...
Sunday, June 8, 2014 at 9:14pm

Physics
Astrology, that unlikely and vague pseudoscience, makes much of the position of the planets at the moment of one’s birth. The only known force a planet exerts on objects on Earth is gravitational. (a) Calculate the gravitational force exerted on a 4.20 kg baby by the ...
Sunday, June 8, 2014 at 4:14pm

physics
A geosynchronous Earth satellite is one that has an orbital period equal to the rotational period of the Earth. Such orbits are useful for communication and weather observation because the satellite remains above the same point on Earth, provided it orbits in the equatorial ...
Sunday, June 8, 2014 at 4:13pm

Physics-can someone please check this
John is fired horizontally from a cannon with the speed of 24.5 m/s. In 3.0 seconds he strikes the earth down range. A net will be located on the ground to catch him. a) what is his initial position above the ground? b) What is the horizontal range to put the net? a)+ upward ...
Sunday, June 8, 2014 at 3:30pm

science (Eating and allergies)
Well, can people be allergic to seeds? Recently I have been throwing up after eating. I realised everything causing my sickness was seeds, but I feel like no one else has this. I've eaten tomatoes ( I don't like them but it was in my mum's pasta sauce) and the ...
Sunday, June 8, 2014 at 4:29am

physics
How much additional energy is needed to fire a 7.2 × 10^2 kg weather monitor on the earth’s surface to a height of 120 km above the earth? (rE = 6.38 × 10^6 m, ME = 5.98 × 10^24 kg) Assume that the weather monitor rises to that height, stops, and falls ...
Friday, June 6, 2014 at 2:59pm

physics
Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 10^7 m.
Thursday, June 5, 2014 at 10:43pm

physics
Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 107 m.
Thursday, June 5, 2014 at 9:53pm

Science
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 what does this mean?
Thursday, June 5, 2014 at 6:23pm

Earth Science
Hello! I try to do my homework to the best of my ability. I want to make sure that my answers are correct. My answers will be (*). Please help me if you can.... 1. _______ was the first person to propose the idea of moving continents as a scientific hypothesis. A. Antonio ...
Thursday, June 5, 2014 at 12:43pm

Physics
Help me with this please A 6.0 m section of wire carries a current of 5.2 A from east to west in the earth's magnetic field of 1.0 × 10^-5 T at a location where the magnetic field points south. In which direction does the magnetic force act on the wire? north south ...
Wednesday, June 4, 2014 at 6:30pm

physics
4 kg block rests on a smooth horizontal surface,upper surface of 4 kg is rough.A block of mass 2 kg is placed on its upper surface.The acceleration of upper block with respect to earth when 4 kg mass is pulled by a horizontal force of 30N?coefficient of static friction=0.8 and...
Wednesday, June 4, 2014 at 4:26pm

Science Please Help Me
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...
Tuesday, June 3, 2014 at 1:53pm

science
can someone help me with this question from your perspective? I just need an example of how to write a similar question. Earth’s energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then ...
Monday, June 2, 2014 at 5:57pm

social studies
How does earth climate change and tectonics plates impact Latin Americans inhabitats
Saturday, May 31, 2014 at 10:51pm

Science
Hello! I am having some trouble with this one question. I know that the Earth's gravitational force pulls the train towards the ground, but I do not know how the other forces act on the train. Any help is super appreciated:) Q: Explain how gravitational, electrical, and ...
Saturday, May 31, 2014 at 9:56pm

Science
Hello! I need help on this one question. I know that the Earth's gravitational force pulls the train towards the ground, but I do not understand how the other forces act on it. Explain how gravitational, electrical, and magnetic forces act on a maglev train. Thank you for ...
Saturday, May 31, 2014 at 9:51pm

physics
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 2.56 s.
Saturday, May 31, 2014 at 9:27pm

chem
A weather balloon at Earth’s surface has a volume of 3.9 L at 280 K and 795 mm Hg. If the balloon is released and the volume reaches 4.05 L at 704 mm Hg, what is the temperature? Answer in units of K
Friday, May 30, 2014 at 9:06pm

Science
How is an area’s topography determined? B. By using an areas elevation relief and landforms How do Global Positioning Systems use elevation points on Earth’s system to find latitude and longitude? A. By using signals form a network of satellites How are lakes and ...
Wednesday, May 28, 2014 at 7:22pm

physics
Two cars, A and B, travel in the same direction on a straight section of highway. A has a speed of 69.5 km/h, and B a speed of 84.3 km/h (both relative to the earth). (b) If A is initially 394 m in front of B, how long will it take for B to reach A?
Wednesday, May 28, 2014 at 7:16pm

Science
Which part of the ocean floor is part of the continuous underwater mountain range that circles Earth? B. Mid-ocean ridge Which of the following statements describes the difference between physical and chemical weathering? B. Physical weathering is caused by ice, while chemical...
Wednesday, May 28, 2014 at 6:41pm

Science
How is an area’s topography determined? B. By using an areas elevation relief and landforms How do Global Positioning Systems use elevation points on Earth’s system to find latitude and longitude? A. By using signals form a network of satellites How are lakes and ...
Wednesday, May 28, 2014 at 6:28pm

physics
At a certain undisclosed place (probably not on Earth) an Atwood's like experiment gives the graph of 1/t2 vs Δm the slope is 3.8 (in 1/(kg s2). One also knows that h=1.3m, total mass =0.8kg and I/r2 = 0.08kg. what is the gravitational acceleration is (in m/s2)?
Wednesday, May 28, 2014 at 5:07pm

Science
An object has a mass of 5.0 kg on the surface of the Moon. What would be the object's: a) mass on Earth b) force of gravity on Earth
Wednesday, May 28, 2014 at 3:55pm

Physics
The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 61.8 miles per hour?
Wednesday, May 28, 2014 at 1:55pm

trig
earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
Tuesday, May 27, 2014 at 11:30pm

English III HELP ME PLEASE
Please tell me which ones are wrong and the corrections The War of the Worlds by H. G. Wells [1898] But who shall dwell in these worlds if they be inhabited? Are we or they Lords of the World? And how are all things made for man?- KEPLER (quoted in The Anatomy of Melancholy) ...
Tuesday, May 27, 2014 at 4:40pm

English III
The War of the Worlds by H. G. Wells [1898] But who shall dwell in these worlds if they be inhabited? Are we or they Lords of the World? And how are all things made for man?- KEPLER (quoted in The Anatomy of Melancholy) BOOK ONE: THE COMING OF THE MARTIANS CHAPTER ONE: THE EVE...
Tuesday, May 27, 2014 at 3:20pm

English III
The War of the Worlds by H. G. Wells [1898] But who shall dwell in these worlds if they be inhabited? Are we or they Lords of the World? And how are all things made for man?- KEPLER (quoted in The Anatomy of Melancholy) BOOK ONE: THE COMING OF THE MARTIANS CHAPTER ONE: THE EVE...
Tuesday, May 27, 2014 at 10:22am

Essay
The War of the Worlds by H. G. Wells [1898] But who shall dwell in these worlds if they be inhabited? Are we or they Lords of the World? And how are all things made for man?- KEPLER (quoted in The Anatomy of Melancholy) BOOK ONE: THE COMING OF THE MARTIANS CHAPTER ONE: THE EVE...
Tuesday, May 27, 2014 at 10:15am

English III
The War of the Worlds by H. G. Wells [1898] But who shall dwell in these worlds if they be inhabited? Are we or they Lords of the World? And how are all things made for man?- KEPLER (quoted in The Anatomy of Melancholy) BOOK ONE: THE COMING OF THE MARTIANS CHAPTER ONE: THE EVE...
Tuesday, May 27, 2014 at 10:05am

Earth Science Regents!!!
Two students in different parts of New York State measure the altitude of Polaris is above the horizon. The student near New York City finds the angle to be 41 degrees. The student near Massena finds the angle to be 45 degrees. Which state is best supported by this information...
Sunday, May 25, 2014 at 4:54pm

Physics -- check answers please
The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above Would ...
Wednesday, May 21, 2014 at 5:09pm

Physics
The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the above 2. A ...
Tuesday, May 20, 2014 at 11:32pm

Science
1) A person roller skates down a street heading east. Which of the following would be true about friction in this scenario? a; friction does not affect the skates in the scenario b; friction pulls the skates wheels eastward c; friction pulls the skates wheels downward, toward ...
Tuesday, May 20, 2014 at 10:29pm

Physics
An airplane whose air speed is 600 mi/h is flying perpendicularly to jet stream whose speed relative to the Earth's surface is 100 mi/h. What is the airplane's speed relative to the Earth?
Tuesday, May 20, 2014 at 8:21pm

physics
A 4.0 kg ceiling fan is placed 2.5 m above the floor. What is the gravitational potential energy of the fan(use Earth's value for gravitational acceleration)?
Tuesday, May 20, 2014 at 7:31pm

calculus
Consider the motion of a particle of mass m falling vertically under the earth’s gravitational field, and suppose the downward motion is opposed by a frictional force p(v) dependent on the velocity v(t) of the particle. Then the velocity satisfies the equation mv0(t) = &#...
Tuesday, May 20, 2014 at 2:59pm

Science
A person roller skates down a street heading West. What is true about friction in this case? the choices are 1- does not effect the skates 2- pulls the skates eastward 3- pulls the skates downward toward the center of the earth 4- pulls the skates westward my answer is # 4
Tuesday, May 20, 2014 at 5:30am

Science
A person roller skates down a street heading West. What is true about friction in this case? the choices are 1- does not effect the skates 2- pulls the skates eastward 3- pulls the skates downward toward the center of the earth 4- pulls the skates westward my answer is # 4
Monday, May 19, 2014 at 4:39pm

HELP I DON'T UNDERSTAND THIS QUESTION !
Earth's energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house.Then describe the ideal energy source for generating most of your home's electricity and explain why you chose that source.
Monday, May 19, 2014 at 4:23pm

Physics
What is the centre of mass if the mass of the earth is 81 times that of the moon and the distance between them is 384 Mm=60 rj ?
Monday, May 19, 2014 at 8:44am

Physics
How long would the year be if the distince of the earth from the sun where 20% more?
Monday, May 19, 2014 at 7:52am

science help
1.Why do the islands of Indonesia have many volcanoes and experience frequent earthquakes? A.The islands are located at the boundaries of tectonic plates. B.Many hotspots are found near the islands. C.Magma is less abundant under Earth’s crust near the islands. D.The ...
Sunday, May 18, 2014 at 9:09pm

main idea
The main conclusion you can draw from this paragraph is that A. because of the greenhouse effect, plants on Earth should thrive. B. a greenhouse helps plants to grow faster. C. the atmosphere keeps Earth warm D. in a greenhouse, the Sun's heat is trapped by the glass
Sunday, May 18, 2014 at 6:01pm

English 3
Question 1 “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 ...
Sunday, May 18, 2014 at 5:56pm

HELP PLEASE !!
1.How does the glass of a greenhouse model the carbon dioxide and other gases in Earth’s atmosphere? a)The glass absorbs light and releases energy in the form of heat. b) The glass allows light in and traps much of the radiated heat. c) Plants in a greenhouse absorb ...
Sunday, May 18, 2014 at 5:40pm

calculus
Consider the motion of a particle of mass m falling vertically under the earth’s gravitational field, and suppose the downward motion is opposed by a frictional force p(v) dependent on the velocity v(t) of the particle. Then the velocity satisfies the equation mv0(t) = &#...
Sunday, May 18, 2014 at 3:29am

sceince
hree light beams encounter a medium. One light ray is reflected, while the other two are absorbed. How can the medium be described? Transparent Translucent Opaque or Clear In satellite communication, does the satellite... Receive radio signals Prevent radio signals Send radio ...
Friday, May 16, 2014 at 10:16am

Science
What are reasons you should pick up trash of the ground if the someone leaves it. I have 2, 1. less pollution and 2. keeps earth healthy and clean. I need 2 more
Thursday, May 15, 2014 at 5:24pm

Physics
Calculate the escape velocity of a satellite launched from the earth surface if the radius of the earth is 6.4x10^6m
Thursday, May 15, 2014 at 4:21pm

science
1. How is the equator similar to the prime meridian? (1 point) Both the equator and prime meridian are lines that divide Earth into the Northern and Southern hemispheres. Both the equator and the prime meridian are imaginary base lines from which locations of Earth can be ...
Thursday, May 15, 2014 at 1:26pm

Science
Earth travels around the sun at a spreed of 30,000 meters per second. Express this in kilometers per hour.
Thursday, May 15, 2014 at 11:11am

Logic
Even if you know only some of them please help! 1. Give a proof of the following: (∀F)( (P)( [ιxGx][Px] ⊃ F(P) ) ⊃ F(G)) (∃F)( (P)( F(P) ≡ [ιxGx][Px]) Therefore, E!(ιxGx) 2. Prove the following: [ιxMx][Thales believed that Bx...
Wednesday, May 14, 2014 at 8:40pm

science
help fill in the blanks please?? Similarities in the early development of chickens and opossums suggest that these organisms share a _________. Niles Eldredge found evidence in trilobite fossils in a pattern of evolution in which short periods of long change are mixed in with ...
Wednesday, May 14, 2014 at 4:26pm

english
Read the following passage and identify at least 3 elements of figurative language; explain how each element brings out the theme of the passage. "The Wrong Place" by Susan Michalski Lana woke up, curled in a corner of the seat at the back of the train. She lifted ...
Wednesday, May 14, 2014 at 3:48pm

science
how is the equator similar to the prime meridian A. both the prime meridian and equator are lines that divide earth into norther and southern hemispheres B. both the prime meridian and equator are imaginary base lines from which locations of earth can be measured D. both the ...
Wednesday, May 14, 2014 at 3:28pm

Physics
The space shuttle typically orbits 400 km above the earth's surface. The earth has a mass of 5.98 × 1024 kg and a radius of 6,380 km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttle's cargo bay? B...
Tuesday, May 13, 2014 at 5:17pm

Physics please help?????
Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of the figure, at an altitude h of 450 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90.0 s ahead of Picard, the commander of the other ship. At point P in ...
Tuesday, May 13, 2014 at 4:37pm

Astronomy
Put the following in order from earliest to latest. In doing so, assume that the Nice model occurred as described and that the Grand Tack model also occurred as described. 1) The formation of Jupiter 2) The inward migration of Jupiter due to gas forces 3) The instability "...
Tuesday, May 13, 2014 at 10:04am

physics
What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)
Monday, May 12, 2014 at 11:39pm

English III (11th grade)
Lana woke up, curled in a corner of the seat at the back of the train. She lifted the shade to see that the sun had hidden itself in a bank of clouds fluffy as the eiderdown her mother had wrapped her in as a child. Her darling Ted, a military man with a distinguished career, ...
Monday, May 12, 2014 at 10:37pm

earth science
What latitudes are most likely to see glaciers? A. 30° N and 30° S B. 10° N and 10° S C. 45° N and 45° S D. 90° N and 90° S
Monday, May 12, 2014 at 8:42pm

math
The fastest car on earth a Thrust SSC would win every NASCAR race in America. If it takes 0.5 hours to travel 380 miles, what is its speed?
Monday, May 12, 2014 at 5:35pm

Astronomy
Imagine that you have found an object out in space. When you use the inverse square law to compute its luminosity, you get a ridiculously large value. You therefore suspect that relativistic beaming is at work - the radiation is coming from a jet traveling at speed v directly...
Sunday, May 11, 2014 at 1:22am

Astronomy
Imagine that you are a particle physicist, and you have come up with a theory that some gamma-ray bursts come from the decay of a new and exotic sub-atomic particle that you think might exist. You calculated that if this particle really does exist and decay as you predict, ...
Sunday, May 11, 2014 at 1:21am

physics- answers check
1. For a bar magnet, the magnetic field lines point a. towards the South pole. b. towards the North pole. c. always towards the magnet. d. always away from the magnet. my answer: a 2. Magnetic field lines a. are straight lines. b. are always circles. c. form continuous loops. ...
Saturday, May 10, 2014 at 7:11pm

Science 2
One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from earth. If you are about 11 years old now , how old will you be when light that is leaving. Arcturus today reaches Earth ? How far, in kilometers, will it have traveled? Show your work...
Saturday, May 10, 2014 at 12:51am

math
A 40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form a plat form of dimension 28m by 22m. Find the height of the platform.
Thursday, May 8, 2014 at 9:30pm

Math
I know some of these are really simple, and I can figure them out easy enough, but please answer all questions. I'm learning this subject, but I have to complete the entire school year within a month and I'm up to my head in homework and I just don't have time to ...
Thursday, May 8, 2014 at 8:45pm

science
Which evidence from the sea floor shows that tectonic plates move? A) the sea floor is youngest near a mid ridge and farther away. B) the sea floor is much older the cont. C) mid ocean ridges form the longest range of mountains on earth. D) the sea floor is thinner than the ...
Thursday, May 8, 2014 at 8:41pm

MATH
LIGHT TRAVES AT 186,300 MILES PER SECOND. IF IT TAKES 8.32 MINUTES FOR LIGHT TO TRAVEL TO EARTH FROM THE SUN, HOW FAR AWAY FROM EARTH IS THE SUN. WRITE YOUR ANSWER IN SCIENTIFIC NOTATION.
Wednesday, May 7, 2014 at 9:44pm

SCIENCE
1. where does the conversation current in the mantle obtain its heat energy? a. earths core and crust b. earths mantle c. earths core and mantle*** d. earths mantle 2. How do convection currents cause movement of earth's plates? a. The weathering of rocks in Earth's ...
Wednesday, May 7, 2014 at 2:36pm

science PLEASE CHECK MY ANSWERS
1. where does the conversation current in the mantle obtain its heat energy? a. earths core and crust b. earths mantle c. earths core and mantle*** d. earths mantle 2. How do convection currents cause movement of earth's plates? a. The weathering of rocks in Earth's ...
Wednesday, May 7, 2014 at 2:32pm

science
gravitational force decreases with distance. what does this mean for a space traveler who leaves earth in a spaceship?
Wednesday, May 7, 2014 at 1:36am

physics
The gravitational field strength at 35700km above earth is .225N/kg. what is the tangental velocity of a 100000kg communication satellite? mass of earth = 5.98E24kg and radius of earth = 6.37E6m
Tuesday, May 6, 2014 at 11:32pm

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members