Monday
May 30, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

Earth science
how does the temperature of ocean currents affect climate?
Wednesday, March 25, 2015 by Daniela

physics
An object is projected from the surface of the earth with a speed of 2.73x10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance).
Tuesday, March 24, 2015 by Kristen

PHYSICS -urgent
A bomber in level flight, flying at 92m/s, releases a bomb at a height of 1950m. (a) How long is it before the bomb strikes earth? (19.9s) (b) How far does it travel horizontally? (1832m) (c) What are the horizontal and vertical components of its velocity when it strikes? (...
Tuesday, March 24, 2015 by eddie

Biology
The metabolic pathways of organism living today evolved over a long period of time- undoubtedly in a step wise fashion because of their complexity. Considering everything you have learned to date about the evolution of life on Earth, put the following in the order in which ...
Monday, March 23, 2015 by Trinh

Earth science
What kind of front sometimes spawns tornadoes between an advancing cold and dry air mass and a warm moist air mass? 1) cold 3) stationary 2) warm 4) occluded
Monday, March 23, 2015 by Daniela

Earth science
13 of the19 lives lost you to the Wichita Andover tornado were at the mobile home park in Andover. Even though there was some advanced warning what could explain the relatively high death toll at this location?
Sunday, March 22, 2015 by Daniela

physics
a 70 kg block rests on the earth's surface. How much energy is required to move the block very far from the earth, ending up at rest again?
Sunday, March 22, 2015 by paul

science
1.why is freshwater a limited resource? a)because most water on earth is in lakes** b)because most water on earth is in clouds c)because most water on earth is in the ground d)because most water on earth is salt water
Sunday, March 22, 2015 by HOMEWORK

application of differential equation
somebody please help me find the solution totally lost.... An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is ...
Saturday, March 21, 2015 by maria

application of differential equation
An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is numerically equal to 200v (...
Saturday, March 21, 2015 by maria

differencI also equation
An object of mass 100g is thrown vertically upward from a point 60cm upabove the earth's surface with an initial velocity of 150cm/sec
Saturday, March 21, 2015 by auguste nande

Science!
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Friday, March 20, 2015 by Bella

math
An object of mass 100g is thrown vertically upward from a point 60cm above the earths surface with an initial velocity of 150cm/sec. It rises briefly and then falls vertically to the earth, all of which time it is acted on by air resistance that is numerically equal to 200v (...
Friday, March 20, 2015 by Meitavelo Himufe

Help with physics!
Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force increases c. ...
Thursday, March 19, 2015 by N.

Physics
For the normal force exerted on the book by the wedge in the diagram, which force(s) complete(s) the force pair for Newton’s third law (action-reaction)? 1) the sum of the component of gravity perpendicular to the surface of the incline and the component of Fhand ...
Thursday, March 19, 2015 by kurtis

Science
1. Which type of weather technology often carries cameras that can make images of Earth's surface, clouds, and snow cover? A. weather balloon B. weather satellite**** C. computer D. automated weather station 2. Why are weather forecasts more reliable now compared to ...
Thursday, March 19, 2015 by Bob

Quick English check
(21) Before they leave this festival, many visit the insect petting zoo. (22) Scientists believe some insects have been on Earth since prehistoric times. (23) Children line up for the opportunity to hold strange bugs of all kinds. (24) Most people agree that Purdue's Bug ...
Wednesday, March 18, 2015 by Anonymous

Science
what is the distance above Earth's surface?
Wednesday, March 18, 2015 by Judah

english
These are the times that try men’s souls: The summer soldier and the sunshine patriot will, in this crisis, shrink from the service of his country; but he that stands it NOW, deserves the love and thanks of man and woman. Tyranny, like hell, is not easily conquered; yet ...
Wednesday, March 18, 2015 by jimm

Physics
Hi! I need some help with some physics questions. 1. When two point charges are moved farther apart, what is true about their resulting electric and gravitational forces? a. both forces stay the same b. gravitational force stays the same but electric force increases c. ...
Tuesday, March 17, 2015 by N.

science
In which of the following statement the word light year is used correctly? (A) Ceres dwarf galaxy is 2.46 million lightyear away from us.(B) light travels with the speed of 1 lightyear in the universe (c) the next complete solar eclipse will be seen after 32 light year. (D) ...
Monday, March 16, 2015 by sanjay

physics electromagnetism
Two long parallel vertical wires 0.3m apart are. ' placed east-west of one another. The current in the westerly wire is 30A and on the other 20A. The horizontal component of the earths magnetic flux density is 2*10^-5. Find the force per unit length on each wire. (The ...
Sunday, March 15, 2015 by pascal

PHYSICS
The gravitational forces of the Earth and the Moon are attractive, so there must be a point on a line joining their centers where the gravitational forces on an object cancel. How far is this distance from the Earth's center?
Sunday, March 15, 2015 by Physics

earth
When earth is seen from outer space,it looks mainly blue. This is because most of the earth is covered with.
Saturday, March 14, 2015 by leslie

Science Help Please
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...
Friday, March 13, 2015 by frazzled

Science Help Please
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...
Friday, March 13, 2015 by frazzled

Physics
A mass of 5Kg is 1st weighed on a balance at the top of a tower 20m high.The man is then suspended from a fine wire 20m long and reweivhed.find the difference in a weight ,assuming that the radius of the earth is 6400km,the mass of the earth is 6×10^24kg and G=6.673&...
Friday, March 13, 2015 by Olushola

Physics
At New York City, the earth's magnetic field has a vertical component of that points downward (perpendicular to the ground) and a horizontal component of that points toward geographic north (parallel to the ground). What are the magnitude and direction of the magnetic ...
Thursday, March 12, 2015 by Aggie

science
How long dose it take the moon to rotate once and how many days dose it take to orbit the earth
Wednesday, March 11, 2015 by kevenhotdog74@

Could someone check my answers please? :)
1. How did planetesmals form planets? (1 point) A. They broke apart into smaller chunks. B. They collided and stuck together.** C. They cooled and pulled ice together. D. They began to rotate. 2. Which parts of the sun’s atmosphere become visible during a total solar ...
Wednesday, March 11, 2015 by coolkid

algebra--1 question
Radio signals travel at a rate of 3 * 10^8 meters per second. How many seconds would 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 9.6 * 10^6 meters? (1 point) 3.2 x 10^2 seconds 3.2 x 10^-2 seconds 3....
Wednesday, March 11, 2015 by SkatingDJ

language arts
WEDNESDAY March 11, 2015 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th ...
Wednesday, March 11, 2015 by hello

Religion
Many Christians seem to accept modern cosmology - Galileo's view that the earth is not the center of the Universe - while at the same time disagreeing with the theory of evolution. For this discussion, we will focus on the following questions (in 250 words total): 1. Why ...
Wednesday, March 11, 2015 by Larcey

Physics
A strong lightning bolt transfers about 21.45 C to Earth. How many electrons are transferred? The elemental charge is 1.602 × 10^−19 C.
Tuesday, March 10, 2015 by Jess

Functions - Please Help
In 2001, Windsor, Ontario received its maximum amount of sunlight, 15.28 hrs, on June 21, and its least amount of sunlight, 9.08 hrs, on December 21. 1) Due to the earth's revolution about the sun, the hours of daylight function is periodic. Determine an equation that can ...
Monday, March 9, 2015 by Help Please

physics
How many kilometers would you have to go above the surface of the earth for your weight to decrease to 39{\rm \\%} of what it was at the surface? Express your answer using two significant figures.
Monday, March 9, 2015 by danny

ap physics
(a) Calculate the angular momentum of Earth that arises from its spinning motion on its axis, treating Earth as a uniform solid sphere. J · s (b) Calculate the angular momentum of Earth that arises from its orbital motion about the Sun, treating Earth as a point ...
Sunday, March 8, 2015 by yesica

astronomy
The peak luminosity of a white dwarf supernova is around 10^10LSun and it remains above 10^8LSun for about 150 days. In comparison, the luminosity of a bright Cepheid variable star is about 10000LSun.The Hubble Space Telescope is sensitive enough to make accurate measurements ...
Saturday, March 7, 2015 by Landy

Science
according to ohm's law, what is the resistance of light bulb if the applied voltage is 21.0V and the current is 3.0 amps a 24 ohms b 7.0 ohms**** c 18 ohms d 3.0 ohms a student studying a circuit diagram of a light bulb, battery and a switch correctly identifies it as a ...
Thursday, March 5, 2015 by BUBBLES

physics
The power output in the sun is about 4.00 x 10^26W. (a). Calculate the power per unit area (intensity), in kilowatts per square meter, reaching Earth's upper atmosphere from the sun. The radius of the Earth's orbit is 1.5 x 10^11m.
Thursday, March 5, 2015 by Anonymous

using skills
Which earth science lesson is especially appropriate for the primary grades? A. Moon B. Volcanoes C. Stars D. Weather my answer is d.
Thursday, March 5, 2015 by lauren

earth
what is 15 times 12
Wednesday, March 4, 2015 by sam

7th grade science
how much work is done on an object with 25 kg on earth if it moves 13m? i really need help
Tuesday, March 3, 2015 by KVNG J

Physics
Can someone walk me through how to work this? It's worded weirdly and I'm not sure how to solve it. Mass M1= 2.2 kg lies on a frictionless table, pulled by another mass M2= 4.1 kg under the in of Earth's gravity. a) What is in N the net force acting on the system ...
Tuesday, March 3, 2015 by James

Earth Science
What color will a star be with a surface temperature of 5000–6000 K? A. blue B. yellow C. white my choice is B yellow
Tuesday, March 3, 2015 by Emi

Earth Science
Which of the following is NOT generally associated with a thunderstorm? A. tornado B. lightning C. dry air
Tuesday, March 3, 2015 by Emi

physics
The weight of an object is 480N on the earth and 120N on the moon,calculate the mass of the object on the moon
Tuesday, March 3, 2015 by rebone

physics
If a man weighs 820N on d earth what would be on Jupiter, where the acceleration due to gravity is 25.9m/s
Tuesday, March 3, 2015 by ikeokwu stephen chidebere

Calculus Physics
Imagine a spaceship on its way to the moon from the earth. Find the point, as measured from the center of the earth, where the force of gravity due to the earth is balanced exactly by the gravity of the moon. This point lies on a line between the centers of the earth and the ...
Monday, March 2, 2015 by danny

science
Part I: Units of Measurement for Gas Laws For the following questions, use the following answer choices to indicate what each unit of measurement is used to measure (pressure, volume, or temperature). 1. atm 2. kPa 3. L 4. oC 5. torr 6. K 7. mL 8. cubic centimeters (cm3) ...
Monday, March 2, 2015 by Alex

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 isthe gravitational acceleration(or number of 'gs'you"ll feel)on saturn?
Monday, March 2, 2015 by Thando

Earth Science
Which of the following organisms is most likely to survive? A. the top carnivore in a food chain B. a herbivore in a food chain C. the top carnivore in a food web
Monday, March 2, 2015 by Emi

Chemistry
What is the magnitude of the orbital velocity of the earth when the radius of the earth's orbit around the sun is 150000000?
Sunday, March 1, 2015 by Flora

Physics 1
In recent years, scientists have discovered hundreds of planets orbiting other stars. Some of these planets are in orbits that are similar to that of earth, which orbits the sun (Msun = 1.99 × 10^(30) kg) at a distance of 1.50 × 10^(11) m, called 1 astronomical ...
Sunday, March 1, 2015 by Skyler

physics
A 39-turn circular coil of wire has a diameter of 1.2m. It is placed with its axis along the direction of the Earth's magnetic field of 58μT at 52° below the horizontal, and then in 0.16s it is flipped 180°. a) What is volts the magnitude of the average ...
Saturday, February 28, 2015 by Katie

Earth Science
Which of the following does NOT occur at a convergent boundary? A. The leading edges of both plates are bent downward. B. Oceanic crust is pushed down into the mantle. C. One continental plate moves into an oceanic plate. I think it's C
Saturday, February 28, 2015 by Emi

Earth Science - Please Check My Answer
Please help with the following: How does sleet differ from snow? A. It is not a form of precipitation. B. It is liquid and not ice. C. It starts as rain and freezes in the air. D. It starts as water vapor and changes to a solid. I know that answer is not D because I got it ...
Friday, February 27, 2015 by Brady

Earth Science
2.   The Moon is made up of minerals similar to those on Earth, which are  A. rilles. B. lunar breccias. C. silicates. D. highlands. I am thinking either B or D?
Thursday, February 26, 2015 by Sarah

math
The Position of two A and B on the earth’s surface are (36°N, 49°E) and (36°N, 131°W ) respectively. (a) The difference in long between town A and town
Thursday, February 26, 2015 by kudu

Physics
Calculate the weight of an astronaut whose mass (including spacesuit)is 72kg on the surface of the moon? What is the astronauts weight on Earth? Comment on the difference
Wednesday, February 25, 2015 by Nicole

math
A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
Wednesday, February 25, 2015 by aristotle

Earth Science
Hubble said that stars are moving away from the Earth because they have more of what color? Blue, Green, Red or Violet
Wednesday, February 25, 2015 by Alexgc

physical science
If the mans weight is 490N on earth,calculate his weight on the moon that has the gravitational force 1/2 of the gravitational force of the aerth
Wednesday, February 25, 2015 by nelson

Earth Science to Ms.Sue (urgent )
18.   The Cenozoic Era is also referred to as the  A. Age of Dinosaurs. B. Age of Mammals. C. Age of Fish. D. First Era. B???
Tuesday, February 24, 2015 by Sarah

Earth Science to Ms.Sue
9.   Another name for unicellular organisms that dominated Earth up to the Precambrian time is  A. eukaryotes. B. cyanobacteria. C. stromatolites. D. prokaryotes. D?
Tuesday, February 24, 2015 by Sarah

Earth Science
Why does the Earth have a magnetic field?
Tuesday, February 24, 2015 by Alexgc

physics
Calculate the distance between the center of the earth and the center of the moon at which the gravitational force exerted by the earth on an object is equal in magnitude to the force exerted by the moon on the object.
Monday, February 23, 2015 by Cali

physics
A satellite is in a circular orbit around the Earth at an altitude of 3.30 106 m. (a) Find the period of the orbit. (Hint: Modify Kepler's third law so it is suitable for objects orbiting the Earth rather than the Sun. The radius of the Earth is 6.38 106 m, and the mass of...
Sunday, February 22, 2015 by alba

physics
After the Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. In this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the Earth. (a) Calculate the average density of the ...
Sunday, February 22, 2015 by alba

Earth Science
4.   Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.  A. oxygen B. lead C. hydrogen D. ore A?
Sunday, February 22, 2015 by Sarah

math
A vector can be used to represent the path of a drill tip used to bore a deep mine shaft in Sudbury one quarter of the way to the centre of the Earth. Represent the vector using a directed line segment and Cartesian co-ordinates and describe which representation may be more ...
Saturday, February 21, 2015 by anon

physics
If a person weighs 700N on Earth, what force due to gravity would they exert on a 1500kg car they are standing 1.5m from? Assume the distance is between their centres of mass. F=Gm1xm2/r^2?
Friday, February 20, 2015 by Emma

Overdue Science Lesson, Very Urgent.
1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. 2, Which features form...
Friday, February 20, 2015 by Anonymous :)!

physics
The magnetic field of the Earth is 0.50 x 10-4 T in a certain location. a) What will be in Newtons the force on a completely ionized carbon atom (Z = 6, A = 12) traveling with the solar wind with a velocity of 18.00 x 103 m/s perpendicular to the magnetic field? b) How fast ...
Friday, February 20, 2015 by Trisha

physics
A 25,000 kg rocket ship near the surface of the Earth accelerates upwards due to a constant 1.25 MN of thrust from its engine. A simple pendulum on the ship is observed to complete 100 full swings in 75.0 s. What is the length of the string? 1. For a simple pendulum: T = 2&#...
Friday, February 20, 2015 by Anonymous

PHYSICS
A hypothetical planet has a mass 1.55 times that of Earth, but the same radius. What is g near its surface?
Friday, February 20, 2015 by Natalie

Algebra 1
Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate the surface area of earth using the formula for the surface area is a sphere, S = 4 pi r squared. Earths surface is about 70 percent water. About how many square meters of earths surface are covered with ...
Thursday, February 19, 2015 by Lauren

physics
The magnetic field of the Earth is 0.60 x 10-4 T in a certain location. a) What will be in Newtons the force on a completely ionized carbon atom (Z = 6, A = 12) traveling with the solar wind with a velocity of 10.50 x 103 m/s perpendicular to the magnetic field? b) How fast ...
Thursday, February 19, 2015 by Annie

science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Wednesday, February 18, 2015 by Oscar

physics
a pendulum is 0.75 meters long and has a period of 4.17seconds is this pendulum on the earth moon or mars?
Wednesday, February 18, 2015 by nikq

math
The Position of two A and B on the earth’s surface are (36°N, 49°E) and (360°N, 131°W ) respectively. (a) The difference in long between town A and town (b) Given that the radius of the earth is 6370, calculate the distance town A and town B. (c) Another ...
Tuesday, February 17, 2015 by kudu

physics
A woman with mass of 63 kg stands at the rim of a horizontal table having a moment of inertia of 520 kg m2 and a radius of 1.5 m. The turntable is initially at rest and is free to rotate about a frictionless, vertical axis through its center. The woman then starts walking ...
Monday, February 16, 2015 by Lexus

Accelerated Science
Match each situation with the correct method of heat transfer: a. radiation b. conduction c. convection __A_ 1) The inside of a car gets very hot when that car is parked on a parking lot in the middle of August. __A_ 2) During the winter when the furnace is running in a two-...
Monday, February 16, 2015 by Anonymous

Physics
A simple pendulum has mass 1.14 kg and length 0.760 m. (a) What is the period of the pendulum near the surface of Earth? (b) If the same mass is attached to a spring, what spring constant would result in the period of motion found in part (a)?
Sunday, February 15, 2015 by Joanna

Physics Circular Motion
A satellite in orbit around the earth has a period of one hour. An identical satellite is placed in an orbit having a radius that is nine times larger than that of the first satellite. What is the period of the second satellite?
Sunday, February 15, 2015 by Jayesh

Astronomy
The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for circular ...
Sunday, February 15, 2015 by Allison

math
John was the first US astronaut to orbit Earth. His 3 orbit flight took 4 hours and 55 minutes. His spacecraft took off at 7:15 am. What time was John flight complete?
Sunday, February 15, 2015 by bryce

Earth Science
18.   Which of the following is a factor that determines the composition of magma?  A. Texture B. Elasticity C. Color D. Viscosity  D or B?
Saturday, February 14, 2015 by Sarah

Earth Science
16.   What type of instrument measures seismic waves?  A. Mercalli scale B. Seismic scale C. Seismogram D. Seismometer D?
Saturday, February 14, 2015 by Sarah

Earth Science
15.   _______ currents assist in the transfer of thermal energy from warmer climates to cooler climates.  A. Platonic B. Plutonium C. Convection D. Tectonic C? Please explain
Saturday, February 14, 2015 by Sarah

Earth Science
12.   The original location of an earthquake is also known as the  A. horizon. B. epicenter. C. hotspot. D. magnitude. B?
Saturday, February 14, 2015 by Sarah

Earth Science
11.   Which earthquake scale takes into consideration the damage caused by an earthquake?  A. Amplitude scale B. Moment magnitude scale C. Richter scale D. Modified Mercalli scale D?
Friday, February 13, 2015 by Sarah

Physics
The potential difference between a storm cloud and the ground is 2.13 × 108 V. If a bolt carrying 2 C falls from a cloud to Earth, what is the magnitude of the change of potential energy of the charge? Answer in units of J.
Friday, February 13, 2015 by Davie

Earth Science
5.   Most tornadoes carry wind speeds that range from  A. 105 to 177 km per hour. B. 178 to 266 km per hour. C. 267 to 322 km per hour. D. 1 to 105 km per hour. A?
Friday, February 13, 2015 by Sarah

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
Friday, February 13, 2015 by Katie

Earth Science
Could I have some help with the question down below?
Thursday, February 12, 2015 by Sarah

Earth Science
18.   How many chemical reactions are possible regarding the formation of carbonic acid and the dissolving of calcite?  A. 23 B. 10 C. 2 D. 3 I am stuck on this I looked in my text book and it shows the words but not the number answers!
Thursday, February 12, 2015 by Sarah

science
The flowerpot weighs 5 pounds on Earth and 0.29 pounds on Pluto. Which proportion could you use to calculate a 115-pound person’s weight on Pluto? A. 5 over 0.29 = 115 over w B. 0.29 over 5 = w over 115 C. 5 over 0.29 = w over 115 D. either A or B
Thursday, February 12, 2015 by Spartans

science
The same astronaut visited Pluto. His weight on Earth was still 170 pounds, and his weight on Pluto was only 10 pounds. He removed an ice core with a weight of 25 pounds on Pluto. What is the weight of the ice core on Earth? A. 1.5 pounds B. 15 pounds C. 42.5 pounds D. 425 pounds
Thursday, February 12, 2015 by Spartans

science
An astronaut who weighed 170 pounds on Earth found that his weight on Jupiter was 400 pounds. He captured an alien that weighed 120 pounds on Jupiter. What is the alien's weight on Earth? A. 34 pounds B. 51 pounds C. 78 pounds D. 283 pounds
Thursday, February 12, 2015 by Spartans

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5
  8. 6
  9. 7
  10. 8
  11. 9
  12. 10
  13. 11
  14. 12
  15. 13
  16. 14
  17. 15
  18. Next>>

Homework Help: Science