Saturday
February 13, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Thursday, February 20, 2014 by Michelle

Astronomy
How can Google Earth be used to access the size of the Earth?
Thursday, February 20, 2014 by Barbara

Chemistry
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 7.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 8.40 ...
Wednesday, February 19, 2014 by Katie

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Wednesday, February 19, 2014 by Michelle

PHYSICS
Sun..BLANK....than moon. earth iS..BLANK... mercury.
Wednesday, February 19, 2014 by Reem

science
Which statement about supercell storms is false? A. A supercell storm can produce some of the most violent weather conditions on Earth. B. A supercell storm occurs only during the winter months. C. A supercell storm is characterized by rotating updrafts. D. A supercell storm ...
Wednesday, February 19, 2014 by kevin

Physics
Canadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, traveling at speeds up to about 100 km/h. If one such bird is flying at 100 km/h relative to the air, but there is a 38.0km/h wind blowing from west to east. a) ...
Wednesday, February 19, 2014 by ana

Physics
A canoe has a velocity of 0.410m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity v⃗ c/r of the canoe relative to the river
Wednesday, February 19, 2014 by ana

science
in this place Friday comes before Thursday,fall comes before spring,and Mars is closer to the moon than earth?
Tuesday, February 18, 2014 by gigi

Math
The formula for the velocity of an object is , where v is the velocity of the object, d is the distance traveled, and t is the time elapsed while that distance is traveled. v=d/t distance = speed times time so time in seconds = distance in meters / speed in meters/second we ...
Tuesday, February 18, 2014 by Dani

Math
Every moment of every day, light pours out from the Sun at the center of our solar system and travels to Earth. It does not arrive at Earth instantaneously though; it takes time to get here. Your task is to figure out how long it takes for light to travel from the Sun to Earth...
Tuesday, February 18, 2014 by Danielle

physic 1
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...
Tuesday, February 18, 2014 by Anonymous

physics
we have learnt that Earth's gravitational field strength is 10 N/kg is the same as its acceleration due to free fall (10 m/s/s. even though their units are different, they are said to be dimentionally the same. prove that N/kg is the same as m/s/s
Tuesday, February 18, 2014 by shaz

Astronomy
How far will Venus be from Earth on February 19, 2014?
Monday, February 17, 2014 by Carol

science
Which statement best describes Newton’s Law of Universal Gravitation? A.Large objects, like Earth and the Sun, attract other objects everywhere in the universe. B.Gravity is a kind of magnetic force between objects and Earth. C.Gravity is the result of the curvature of ...
Monday, February 17, 2014 by victoria

phsics
A 75 kg man weighs 735 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
Monday, February 17, 2014 by Anonymous

science
A person who weighs 600 newtons on Earth would weigh only 100 newtons on the Moon. Which statement best explains why? A.The circumference of Earth is larger than that of the Moon. B.The density of Earth is greater than that of the Moon. C.The mass of Earth is greater than that...
Monday, February 17, 2014 by victoria

Physics
A ball is thrown upward in two dimensions with an initial speed of 17 Zlugs per mega handle(made up) near the surface of the planet earth. What will be the y component of the balls velocity at the peak of its trajectory?
Monday, February 17, 2014 by Michelle

physics
How far from Earth will Venus be today?
Sunday, February 16, 2014 by Ann

physical science
the diameter of the planet saturn is 10 times that of the earth but the mass of the planet is only 90 times greater than that of the earth.what is the gravitational acceleration or number gs you will feel on saturn?(8.8m.s-2)
Sunday, February 16, 2014 by celiwe

maths
body of weight is inversely propotional to square of its distance from center of earth,radius of the earth is 6380 km, how much 80 kg man weigh 1600 km from the surface of earth
Sunday, February 16, 2014 by Anonymous

Physics
calculate the work required to launch a satellite from the surface of the earth (radius6380km) to orbit 6000 km above the surface
Sunday, February 16, 2014 by Henry

Physics
The radius of the moon is approximately one quarter of the earth's radius,and its mass is on eightieth of the earth's mass.Calculate the weight of a man with a mass of 80KG on the surface of the moon
Saturday, February 15, 2014 by Zanele

physics 1
The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational forces. Use the data on ...
Thursday, February 13, 2014 by Anonymous

english part 1
Which of the following best expresses the writer's main idea in “Single Room, Earth View”? A. Space exploration leads to human progress. B. Space travel offers a unique view of Earth. C. Astronauts are highly trained scientists. D. Pollution is endangering Earth.
Thursday, February 13, 2014 by Wahab

science
14. Chemical runoff from fields, oil spills, and erosion is the major source of (1 point) a. air pollution b. water pollution c. hydropower d. renewable energy 15. Which compound causes the depletion of earth's ozone layer? (1 point) a. ultraviolet radiation b. ...
Wednesday, February 12, 2014 by bla

physics
1 What is the gravitational field strength at a height h above the surface of the Earth? R is the radius of the earth gR2(R+h)2 gR(R+h) Rg(R−h) R2g(R−h)2 2 The instrument used for experimental determination of the value of the universal gravitational constant G is ...
Wednesday, February 12, 2014 by nandeve

physics
A seagull flies at a velocity of 10.00 m/s straight into the wind. (a) If it takes the bird 18.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind?
Tuesday, February 11, 2014 by Steve

algebra based physics
Electric bees. As they fly through the air, honeybees can pick up a small amount of electric charge. Suppose a 0.12-g bee acquires a charge of –65pC. How many excess electrons has the bee acquired? Find the magnitude of the electric force on the bee in the electric field ...
Monday, February 10, 2014 by jrfannin

science
What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s C) 5 km/...
Monday, February 10, 2014 by Tori

chemistry
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there are 365 days in a...
Monday, February 10, 2014 by Kory

chemistry
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of four particles per second. How many years would it take to count 8.10 x 10^23 particles? Assume that there are 365 days in a...
Monday, February 10, 2014 by Kory

Science
what would happen to an object if the force of gravity on earth was decreased by half. a- its mass would decrease b- its weight would decrease c- its density would decrease d- its volume would decrease my answer is B
Sunday, February 9, 2014 by Steve

physical science
Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.
Sunday, February 9, 2014 by sky

science
A British Concorde (BC) and a French Concorde (FC) flew in opposite directions around the earth (40 000 km). The BC covered half of its flight distance at a supersonic speed of 2500 km/h and the other half at a subsonic speed of 1000 km/h. The FC spent half of its flight time ...
Saturday, February 8, 2014 by king12

science
1.What two things happen to particles in a substance when the substance is heated? 2. What are the three most common states of matter on Earth? 3. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? 4. A certain...
Saturday, February 8, 2014 by bob

science
If we drilled a hole straight through the earth, and dropped a golf ball down the hole, starting initially at rest, how fast would the ball be traveling when it reached the center of the earth. The earth’s radius is 6378 km.
Thursday, February 6, 2014 by kristi

Math
Simplify the expression. (-4)^-6(-4)^-7 My answer: -4 Simplify and give the answer in scientific notation. (5 X 10^6((3 X 10^5) My answer: 1.5 X 10^12 (3 X 10^6)(8 X 10^-4) My answer: 2.4 X 10^3 Astronomers measure large distances in light-years. One light-year is the distance...
Thursday, February 6, 2014 by Anonymous

science
Which statement about supercell storms is false? A. A supercell storm can develop into a self-sustaining, extremely powerful storm. B. A supercell storm is characterized by rotating updrafts. C. A supercell storm occurs only during the winter months. D. A supercell storm can ...
Wednesday, February 5, 2014 by ddee

english
9. What personality trait does Odysseus reveal when he devises a plan to listen to the Sirens' song and yet escape destruction? (1 point) irritability loyalty curiosity generosity10. Read the following passage from the Odyssey: Tell me, where was it, now, you left your ...
Wednesday, February 5, 2014 by love

Physics
If the period of the moon were 31 days while its orbit radius 3.8x10^8m, what would the mass of the Earth be?
Wednesday, February 5, 2014 by Mandy

english (check my work)
9. What personality trait does Odysseus reveal when he devises a plan to listen to the Sirens' song and yet escape destruction? (1 point) irritability loyalty curiosity generosity10. Read the following passage from the Odyssey: Tell me, where was it, now, you left your ...
Wednesday, February 5, 2014 by fluffy

physic
During fair weather, an electric field of about 100 N/C points vertically downward into the earth's atmosphere. Assuming that this field arises from charge distributed in a spherically symmetric manner over the surface of the earth, determine the net charge of the earth ...
Wednesday, February 5, 2014 by julone

Physics
Consider an interstellar spaceship powered by matter-antimatter reactions. The energy resulting from the matter-antimatter reactions is ejected from the exhaust as electromagnetic radiation producing thrust. The design goal is to have the thrust produce an acceleration equal ...
Wednesday, February 5, 2014 by Monika

english
9. What personality trait does Odysseus reveal when he devises a plan to listen to the Sirens' song and yet escape destruction? (1 point) irritability loyalty curiosity generosity10. Read the following passage from the Odyssey: Tell me, where was it, now, you left your ...
Tuesday, February 4, 2014 by fluffy

Physics
The earths mass is m=5.98*10^24 kg and physics students masss is 70 kg. Knowing that the gravitational force between the student and the earth is 392 N of force, what is the distance between the student and the Earths center?
Tuesday, February 4, 2014 by Ezabelle

Physics - General Physics
An airplane with a speed of 74.5 m/s is climbing upward at an angle of 64.8 degrees with respect to the horizontal. When the plane's altitude is 687 m, the pilot releases the package. (a) Calculate the distance along the ground measured from a point directly beneath the ...
Tuesday, February 4, 2014 by Kace

Physics - General Physics
An airplane with a speed of 74.5 m/s is climbing upward at an angle of 64.8 degrees with respect to the horizontal. When the plane's altitude is 687 m, the pilot releases the package. (a) Calculate the distance along the ground measured from a point directly beneath the ...
Tuesday, February 4, 2014 by Kace

physics
How do I calculate the radial acceleration in g's? For example: Calculate the radial acceleration (in g’s) of an object on the ground at the earth's equator, turning with the planet. Earth's radius is 6380 km.
Monday, February 3, 2014 by D

Physics Please check my answers
It's possible for a body to have both rotational and translational motion at the same time. True. << False. 2. The moment of inertia of an object would be different on the surface of the earth than on the surface of the moon. True. << False. 3. The moment of ...
Monday, February 3, 2014 by Chelsea

EARTH SCIENCE
When the water level of a stream or river exceeds its natural banks, it has reached its
Monday, February 3, 2014 by SAM

Physics
A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...
Sunday, February 2, 2014 by Cam

Physics
A blue ball is thrown upward with an initial speed of 19.6 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.1 meters above the ground. The force of ...
Sunday, February 2, 2014 by Cam

physics
ind the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×10^23kg), when Mars is at its closest to Earth (distance = 5.6×10^10m).
Sunday, February 2, 2014 by bob

physics
Find the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×1023kg), when Mars is at its closest to Earth (distance = 5.6×1010m).
Sunday, February 2, 2014 by bob

physics
What is the ratio of the gravitational force on you when you are 5800 km above the Earth's surface versus when you are standing on the surface? (The Earth's radius is about 6400 km.)
Saturday, February 1, 2014 by Anonymous

Science
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite B? 2. A common characteristic of mountains formed by two colliding continents is marine _______ rock. A. sedimentary B. metamorphic C. limestone D. igneous A...
Saturday, February 1, 2014 by Beatrice

SCIENCE
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
Saturday, February 1, 2014 by Beatrice

Science
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
Saturday, February 1, 2014 by Beatrice

science
The Earth is a satellite of the sun? If not can you tell me what it is?
Thursday, January 30, 2014 by ilikezackalot

math
1.The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three remaining ...
Thursday, January 30, 2014 by SammySam

Chemistry
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 1.30 ...
Thursday, January 30, 2014 by Clare

science
Granite is an igneous rock that forms from magma cooled below Earth's surface.Why would granite have larger crystals than igneous rocks formed from lava cooled above Earth's surface?
Wednesday, January 29, 2014 by Anonymous

Science
1. The combination of sulfur dioxide, nitrogen oxide, and atmospheric moisture creates A. drinking water. B. smog. C. pesticides. D. acid rain. D? 2. Another name for unicellular organisms that dominated Earth up to the Precambrian time is A. eukaryotes. B. cyanobacteria. C. ...
Wednesday, January 29, 2014 by Beatrice

Physics
Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force on the astronaut here at Earth’s ...
Tuesday, January 28, 2014 by Haley

earth (or Biology?)
You collect some pond water and filter out the different organisms into separate jars. You add no food to the water, but one kind of organism is still alive long after the others have died. That species is best described as being _________.
Tuesday, January 28, 2014 by Gatorgirl

Writing Evaluation (Writeacher)
Should I revise anything? In my opinion, the use of “scary things” as entertainment is redundant. I mean, honestly, what on earth is so enjoyable about fear? Fear is what haunts us and frightened us even as young children. Yes, we are taught to face it, to not fear ...
Tuesday, January 28, 2014 by Anonymous

physics
Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface.
Tuesday, January 28, 2014 by hanna

EARTH SCIENCE- SO STUCK
How far from an earthquake epicenter is a city where the difference between the P-wave and the S-wave arrival times is 5 minutes and 00 seconds?
Tuesday, January 28, 2014 by andra

earth
What causes sedimentation in the ocean?
Tuesday, January 28, 2014 by Angie

physics
a projectile is ejected from a 25 m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth? (Assume gravity on mars = .38gEarth) The ...
Monday, January 27, 2014 by kjean

Physic
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
Monday, January 27, 2014 by Asiay

physis
Search: 2. Explain how radioactive decay has always warmed the Earth from the inside, and nuclear fusion has always warmed Earth from the outside.
Sunday, January 26, 2014 by barbara

Physic II
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
Sunday, January 26, 2014 by Gugubi

Physic II
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons? Fiqure is triangle with equal sides 2.5 m and base is 0.5 m
Sunday, January 26, 2014 by Gulnihal

EARTH SCIENCE
Cumulus and stratus clouds belong to which cloud group? A. Puffy clouds B. High clouds C. Middle clouds D. Low clouds Is it A? What is the basic cause of ocean tides? A. Gravitational force of volcanic activity B. Gravitational attraction between the Moon and the entire solar...
Saturday, January 25, 2014 by Beatrice

physics
1. 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 ...
Friday, January 24, 2014 by Anika

Science
Can someone please check my answers and if they are wrong can you help me fix them? Thank so much!! 1. Which of the following determines the strength of the force of gravity between two objects? Check all that apply. (2 points) the speeds of the objects the masses of the ...
Friday, January 24, 2014 by Melissa

Chemistry 1
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing the extraterrestrial life form also ...
Friday, January 24, 2014 by Molly

history
According to Franz Fanon in his book The Wretched of the Earth, A. colonization need not be violent. B. decolonization need not be violent. C. decolonization is always violent. D. colonization is an inevitable necessary evil.
Friday, January 24, 2014 by Victoria

english
According to Franz Fanon in his book The Wretched of the Earth, A. colonization need not be violent. B. decolonization need not be violent. C. decolonization is always violent. D. colonization is an inevitable necessary evil.
Friday, January 24, 2014 by Victoria

Science??!!! :/
I don't get any of this, plz plz, explain these to me!! 1.why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time ...
Thursday, January 23, 2014 by Princess Anna

physics
A tennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 52 m/s (about 117 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same speed (52 m/s). As ...
Thursday, January 23, 2014 by Sandy

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Thursday, January 23, 2014 by Beatrice

8th CCA Science
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...
Wednesday, January 22, 2014 by mtv

science help plzzz
Multiple Choice 1. Which of Earth's spheres contains mountains, valleys, and other landscapes? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following are examples of destructive forces? (1 point) ice wind both ice and wind neither ice nor wind 3. ...
Wednesday, January 22, 2014 by josh

English
Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...
Wednesday, January 22, 2014 by Tommy

help-3 questions
5. Which of the following is an important criterion for evaluating the effectiveness of a graphic organizer? how colorful it is how well it conveys information how many pages it is how many words it contains 6. How was information conveyed in the Google Earth tour about ...
Wednesday, January 22, 2014 by Princess Anna

social studies
I need to answer the questions on my study guide, it is my homework but I forgot my book,I need to read chapter 3 it's about our earth,s renewable and non renewable resources.where else I find out about it
Tuesday, January 21, 2014 by lily

science
What is the acceleration of a 7kg rocjet if a force of 68.6 kg m/s/s (N) is used to move it away from the earth
Tuesday, January 21, 2014 by ben

Physics
A 33.4 kg child, with a 3.05 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the force (positive up/negative down) on the sidewalk from the child when the child is (a) standing still and (b) in the air. Now find the net force (positive ...
Tuesday, January 21, 2014 by John

Science
Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot ...
Tuesday, January 21, 2014 by Mandy

someones GOTTA help me with this science...!!!
1. Which of the following describes the correct sequence of events during the water cycle? (1 point)precipitation ¨ condensation ¨ evaporation ¨ runoff condensation ¨ precipitation ¨ runoff ¨ evaporation runoff ...
Monday, January 20, 2014 by TTR+S<3

Physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each? ------------------------------- I've worked ...
Sunday, January 19, 2014 by John

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 by anonymous

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 by anonymous

physics- multiple choice
1. A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force a) of zero b) of less than 600 N is the truck is slowing down c) equal to 600 N only if the truck is moving at constant velocity d) equal to 600 N no matter ...
Sunday, January 19, 2014 by Diane

Earth Science
Silver has a density of 10.5 g/cm cubed, and gold has a density of 19.3 g/cm cubed. Which would have the greater mass, 5cm cubed of silver or 5 cm cubed of gold?
Friday, January 17, 2014 by Bern

science help plzzz
1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave that can be extremely ...
Friday, January 17, 2014 by josh

math
a pit is dug in the shape of a cuboid with dimensions 10m*8m*3m. the earth taken out is spread evenly on a rectangular plot of land with dimensions 40m*30m. what is the increase in the level of the plot.
Friday, January 17, 2014 by Rihanna

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Homework Help: Science