Monday
April 27, 2015

Homework Help: Science: Earth

Recent Homework Questions About Earth

phyics
_________ was the first to show that all objects fall toward Earth with constant ____________.
Thursday, October 23, 2014 at 4:36pm

Science- Astronomy
Suppose we find a planet in another solar system that has an earth like atmosphere with plentiful oxygen but no life of any kind. Question= Is this discovery considered reasonable or surprising can you please explain? Thank you
Wednesday, October 22, 2014 at 10:30am

earth
Broad areas of folded rock layers that resemble a bowl turned right-side up are called _____.
Wednesday, October 22, 2014 at 8:36am

Social Studies
One reason for the difference between average temperatures in Rome when in Jan. the average temperature is 11 degrees Celsius and July average degree is 30 degree Celsius is: The amount of carbon dioxide present in the atmosphere The tilt of the Earth of its axis The tidal ...
Wednesday, October 22, 2014 at 8:23am

math
The scale for an earth model is 1:40000000. The diameter of the earth is 12,756.32km. a)What is the diameter of the model in cm? I got 31.9cm (just need help on part b!) b) If the model is cut in half, how many jars of paint would be needed to paint each half if 1 jar covered ...
Wednesday, October 22, 2014 at 12:39am

Math
The scale for an earth model is 1:40000000. The diameter of the earth is 12,756.32km. a)What is the diameter of the model in cm? b) If the model is cut in half, how many jars of paint would be needed to paint each half if 1 jar covered 10cm^2?
Tuesday, October 21, 2014 at 11:27pm

Physics
Ninja goes to space! If Ninja has a weight of 83.59 N on earth and she lands on a planet that has an acceleration due to gravity of 1.44 m/s2, then what is her weight on the new planet?
Tuesday, October 21, 2014 at 10:34pm

World History (Ms. Sue)
"It is [the Africans] who carry the 'Black man's burden...' In hewing out for himself a fixed abode in Africa, the white man has massacred the African in heaps...What the partial occupation of his soil by the white man has failed do; ...what the [machine gun] ...
Tuesday, October 21, 2014 at 12:15pm

Physics
Suppose the surface (radius = r) of a cylindrical space station is rotating at 29.1 m/s to provide artificial gravity. What must be the value of r for the astronauts to weigh 1/3 of their earth weight? Don't know how to start please help.
Monday, October 20, 2014 at 11:35pm

Physics
A satellite in circular orbit around the earth has an orbital speed of 5 km/s. What is the period of the orbit? Assume the mass of the Earth is 5.98e24 kg.
Sunday, October 19, 2014 at 12:25pm

p i s j
The mass of fan astronaut is 100kg 1)find its weight on earth. 2)find its weight on moon. When the gravitational acceleration on moon is 1.6 ms
Sunday, October 19, 2014 at 5:08am

Physics Help Please!!!! Check!
if I weigh N on Earth and 5320 N on the surface of a planet, what is the acceleration due to gravity on that planet? mg=702N m=702/9.8=71.6 kg mg=5320N g=5320/71.6=74.3 m/s^2
Friday, October 17, 2014 at 9:28pm

Physics
You are making a trip in a space shuttle, and your friend Jimmy is in another space shuttle. He shares the same circular orbit with you, 370 km above earth. However, he is 21 km ahead of you. A) How long will it take you to catch up with your friend if you reduce your orbital ...
Friday, October 17, 2014 at 6:13pm

Calculus
Suppose a ball is thrown straight up into the air, and the height of the ball above the ground is given by the function h(t) = 6 + 37t – 16t2, where h is in feet and t is in seconds. At what time t does the ball stop going up and start returning to earth?
Friday, October 17, 2014 at 9:53am

Language Arts
Why does the author of"Making Tracks on Matt's"sometimes use the pronouns we and us when he is writing about the rovers? A. He and the rovers are on the same spacecraft. B. There are hundreds of people involved in the mission. C. He and his team identify strongly...
Wednesday, October 15, 2014 at 7:48pm

physics
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? (
Wednesday, October 15, 2014 at 6:56pm

physics
A (1.35x10^2) kg box is falling near Earth’s surface. It is accelerating at (7.3000x10^0) m/s^2 [D]. What is the force of air resistance on the box?
Wednesday, October 15, 2014 at 4:25pm

earht science
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, October 15, 2014 at 11:53am

Science
Where will gravity pull you in the center of the earth?
Wednesday, October 15, 2014 at 2:29am

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

math physics
A meteorite is a solid composed of stone and/or metal material from outer space that passes through the atmosphere and hits the earth’s surface. Find the kinetic energy of a meteorite with mass 250 kg that hits the earth at 25 km/s. Given: m=250kg v=2.5E4m/s <<< ...
Monday, October 13, 2014 at 8:54pm

Physics
The space shuttle, with an initial mass M = 2.41×106 kg, is launched from the surface of the earth with an initial net acceleration a = 26.1 m/s^2. The rate of fuel consumption is R = 6.90×103 kg/s. The shuttle reaches outer space with a velocity of vo = 4632. m/s...
Monday, October 13, 2014 at 3:51pm

Earth science
Can you please correct me if I am wrong or let me know what you think Thanks Y-A 1. Trees keep water in a watershed from accumulating silt before it empties into river. (i got true) 2. Permeable means capable of absorbing water. (i got false) 3. Old rivers are characterized by...
Monday, October 13, 2014 at 1:46pm

math
in 1933 wiley post flew around teh world in 7 DAYS 18 HOURS. WILEYS TRIP WOULD BEST BE DESCRIBED AS FLYING AROUND THE ? OF TEH EARTH.
Sunday, October 12, 2014 at 7:08pm

Physics
A cart of mass m (including the mass of the crane) has a pendulum hanging from a crane attached to the cart. There is no friction due to the normal force, u = 0, or wheel bearings of the cart wheels. The cart is experiencing and applied force to the left of 10N. The ball at ...
Sunday, October 12, 2014 at 9:44am

science!! please help me!!
1)When evolution was first proposed, which of the following was used as evidence to support the idea? (1 point) A)observations of nature*** B)laboratory experiments C)extensive fossil collections D)genetic sequences 2)How did Darwin and Lamarck differ in their thinking about ...
Saturday, October 11, 2014 at 9:58am

physicss
If there were no air resistance, with what speed would drops hit the Earth if they fell from a cloud 1980 m above the Earth’s sur- face? The acceleration of gravity is 10 m/s2
Friday, October 10, 2014 at 7:16pm

physics
An astronaut is traveling in a space vehicle moving at 0.520c relative to the Earth. The astronaut measures her pulse rate at 74.0 beats per minute. Signals generated by the astronaut's pulse are radioed to the Earth when the vehicle is moving in a direction perpendicular...
Friday, October 10, 2014 at 2:47pm

physics
A raindrop has a mass of 5.6 × 10-7 kg and is falling near the surface of the earth. Calculate the magnitude of the gravitational force exerted (a) on the raindrop by the earth and (b) on the earth by the raindrop.
Friday, October 10, 2014 at 1:31am

Math
The mass of the Earth is close to 5.97x10^24 kg and the mass of Venus is close to 4.87x10^24 kg. What is the approximate combined mass of both planets A.1.08x10^25 B.2.91*10^49 C.1.08^10^48 D.1.08*10^25
Thursday, October 9, 2014 at 10:31pm

Science: Plate Techtonics (giving out medals)
Hey there! I need help with some answers 1. Why do earthquakes occur along the San Andreas fault line? 2. Which of the following causes Earth's plates to move continuously? 3. Which of the following physical features are not caused by plate tectonics? PLEASE HELP! giving ...
Thursday, October 9, 2014 at 4:57pm

College Science
A chandelier is suspended by two identical, vertical chains side by side. The chandelier's mass is m = 5.3 kg. A. If the tension in one chain is represented by T, write an expression for this tension in terms of m and g, the gravitational acceleration on the Earth's ...
Thursday, October 9, 2014 at 1:17pm

physics
The weight of an astronaut plus his space suit on the Moon is only 270 N. A. How much do they weigh on Earth, in Newtons, assuming the acceleration due to gravity on the moon is 1.67m/s^2= 1584is this right? B. What is the mass of the astronaut and his space suit on the moon ...
Thursday, October 9, 2014 at 1:13pm

physics
In the figure, a frictionless roller coaster car of mass m = 938 kg tops the first hill with speed v0 = 14.9 m/s at height h = 31.5 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If the gravitational ...
Wednesday, October 8, 2014 at 7:17pm

Algebra
The diameter of the moon is about 3476 kilometers. The distance from earth to moon is about 384,400 kilometers. About how many moons could be lined up in a row between earth and the moon? Round to the nearest whole number. Please help answer thanks
Tuesday, October 7, 2014 at 7:19pm

Earth Science
Unlike most road maps, topographic maps can be used to find 1: the best route to a town 20 km away. 2: the temperature at any place on the map 3:the elevation above sea level. 4:the distance between two locations
Tuesday, October 7, 2014 at 6:56pm

Science--2 questions! asap!
During the processes of erosion and deposition, sediments that are the_____ in size will be carried the greatest distances before being deposited. Most___rocks form under conditions found a few kilometers under Earth's surface.
Tuesday, October 7, 2014 at 5:40pm

Math
A projectile is shot upward from the earth with an initial velocity of 320 ft/sec. (a) What is the velocity after 5 secs.? ft/sec. (b) What is the acceleration after 3 secs.? ft/sec^2.
Tuesday, October 7, 2014 at 5:02pm

physics
A red ball is thrown down with an initial speed of 1.4 m/s from a height of 28 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 24.9 m/s, from a height of 0.9 meters above the ground. The force of ...
Monday, October 6, 2014 at 5:55pm

Science pplzzz!!
Which of the following is true about rocks? Rocks are composed of only one mineral. Rocks do not contain any nonmineral matter. Coal is not considered a true rock. Most rocks are a mixture of minerals. 2. If granite undergoes high temperatures and high pressures within Earth, ...
Monday, October 6, 2014 at 9:44am

physics
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hit the ball with a speed of 33m/s at an angle 28∘ above the horizontal.
Sunday, October 5, 2014 at 9:53pm

Science
We are having a debate in Science class. We are each given two questions to debate each other. 1. The Climate is mainly influenced the by the sun? 2. The earth has been warmer in the past?
Sunday, October 5, 2014 at 4:33pm

physics
Superman throws a boulder of weight 1850N at an adversary on the surface of the earth, where the magnitude of the acceleration due to gravity, g = 9.80m/s2 . What horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 11.6m/s2 ?
Sunday, October 5, 2014 at 11:56am

Science
What best explains why carbon is present in so many kinds of molecules? A- It is abundant on earth B- It can form four covalent bonds C- It has valence electrons D- It can become ion I think it is B, however, I am unsure!
Friday, October 3, 2014 at 10:44pm

Physics
The height of the sun from point A is larger than from point B by 4.92 degree.If the distance between A and B is 500 Km, How long is the circumference of the earth? ( assume that earth is perfect sphere)
Friday, October 3, 2014 at 4:39pm

Physics
A 7300-kg satellite has an elliptical orbit, as in the figure. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. The point on the orbit that is closest to the earth is called the perigee and is at the far ...
Friday, October 3, 2014 at 4:20pm

Physics
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.
Friday, October 3, 2014 at 3:00pm

Physics
A 7300-kg satellite has an elliptical orbit, as in the figure. The point on the orbit that is farthest from the earth is called the apogee and is at the far right side of the drawing. The point on the orbit that is closest to the earth is called the perigee and is at the far ...
Friday, October 3, 2014 at 2:05pm

Physics
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.
Friday, October 3, 2014 at 12:36pm

Science
Explain the following quote: ... it was several weeks before an emigrant from Earth could adapt to it. On the Moon the human body had to learn a whole set of reflexes. It had, for the first time, to distinguish between mass and weight. A man who weighed one hundred eighty ...
Thursday, October 2, 2014 at 10:45pm

Earth Science - Please Check 4 Answers
Please help me with the following questions: 2. Which type of information is best represented by a chart? A. the sequence of chemical reactions in photosynthesis B. the percentage composition of gases in car exhaust C. the rate of carbon dioxide production during exercise D. ...
Thursday, October 2, 2014 at 7:12pm

Earth Science - Please Check My Answer
Please help with the following: Dani wants to measure the volume of a pebble. Which tool will give the most accurate measurement? A. a ruler B. a tablespoon C. a measuring cup D. a graduated cylinder I think the answer is mostly D. Is this correct? Please help me by checking ...
Thursday, October 2, 2014 at 6:03pm

Physics
Having trouble on the question below. Would you do need to convert the km to meters and then multiply (4700*9.8*165500)? The first woman in space, cosmonaut Valentina Tereshkova, flew in 1963. She orbited the earth 48 times during her 70 hour 50 minute flight at an average ...
Thursday, October 2, 2014 at 5:57pm

physics
(a) What is the direction of the force on a wire carrying a current due east in a location where the Earth’s field is due north? Both are parallel to the ground. Answer: Direction of force is Vertically up from ground (b) Calculate the force per meter if the wire carries ...
Thursday, October 2, 2014 at 3:51pm

science
please check my answers:)1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of ...
Thursday, October 2, 2014 at 12:01pm

Physics
(II) Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 5–44. The masses are mV = 0.815 mE, mj = 318 mE, mSat = 95.1 mE, ...
Thursday, October 2, 2014 at 12:24am

physics
One hazard of space travel is debris left by previous missions. There are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. Calculate the force exerted by a 0.150 mg chip ...
Wednesday, October 1, 2014 at 9:26pm

Math
On what day in the year 1943 was the earth 300 000 minutes old? (give the month and day)
Wednesday, October 1, 2014 at 8:13pm

E.L.A. PLEASE CHECK!
Which choice best describes the underlined word or words in each sentence? For several decades, satellites around the earth have broadcast signals and monitored weather. Underlined is: satellites A- complete subject B- simple subject C- compound subject D- none of the above I ...
Wednesday, October 1, 2014 at 5:20pm

science
1) Which of the following is a valid reason why a scientist might reject a scientific theory? (1point) Some people disagree with it. It covers too broad a topic. New evidence contradicts it.*** It is too old. 2) A scientific hypothesis must be (1point) Correct Able to be ...
Wednesday, October 1, 2014 at 2:11pm

English
I read Shakespeare's sonnet 29, and I must write a 5 paragraph essay on the theme. I need a few guidance tips and ideas on what to write. Thanks in advance! So, There are multiple themes in this poem but I chose the theme(my main discussion) 'wealth',and I hope to ...
Tuesday, September 30, 2014 at 11:39pm

Physics
Q. Defined escape velocity obtain an expression for the escape velocity of a body from the surface of the earth?
Tuesday, September 30, 2014 at 11:30pm

physics
calculate at what height above the earths surface a satellite must be placed if it is to remain over the same geographical point on the equator of the earth. what is the velocity of the satellite?
Tuesday, September 30, 2014 at 8:22pm

Science
May you please tell me if these are true or false, if they are false then can I have the true statement, thank you In the water cycle, water returns to Earth as (condensation) usually in the form of rain or snow During dry weather, the water level in a small pond drops because...
Monday, September 29, 2014 at 9:53pm

science
an astronaut has a mass of 60 kilograms on earth. what would her mass be on mars? what would her weight be on mars? the strength of gravity o mars is 3.7 m/s^2.... am having a slow moment, please help
Monday, September 29, 2014 at 7:02pm

science
So the question is write down three examples of science in your everyday life. This was my answer: sound- compression wave, Baked goods- chemical reaction, Looking at mountains or ocean- earth science Please check my answer and see if this is good thank you
Monday, September 29, 2014 at 5:10pm

Earth Science
Explain how you could measure the density of a mineral with an exact amount of water and a scale .
Monday, September 29, 2014 at 2:15pm

physics
A certain muon detector counts 600 muouns/h at an altitude of 1900m and 380/h at sea level. Given that the muon half-life at rest is 1.5×(10^-6)s, determine the speed of the muons relative to Earth, assuming they all have the same speed.
Monday, September 29, 2014 at 11:23am

Earth science
A sphere was dropped into water in a graduated cylinder as shown in the following diagram.The water level rose th the new level shown .What is the volume of the sphere
Sunday, September 28, 2014 at 9:42pm

physics
A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km away. The radar antenna is pointing upward at an angle of 58.2 ° above the ground. Find (a) the x and (b) the y components (in km) of the ...
Sunday, September 28, 2014 at 8:47pm

earth science
If the earth was made 4.5 billion years ago, how comes we don't have any craters or rocks from that time?
Sunday, September 28, 2014 at 6:35pm

physics
If the acceleration due to gravity on the Moon is 1/6 that what is on the Earth, what would a 100 kg man weight on the Moon? If a person tried to simulate this gravity in an elevator, how fast would it have to accelerate and in which direction?
Saturday, September 27, 2014 at 10:56pm

Science
Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. a) Which area is closest to the center of the ridge, the older of the ...
Saturday, September 27, 2014 at 6:44pm

physics
A geosynchronous satellite is one that appears to be fixed in the sky, a condition useful for telecommunications. If such a satellite orbits the earth at an altitude of 33000 km above the earth's surface, what is its centripetal acceleration? The radius of the Earth is ...
Saturday, September 27, 2014 at 1:19pm

physics
A satellite of mass 205 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? s (b) What is the satellite's speed in its orbit? m/s (c) What is the ...
Saturday, September 27, 2014 at 11:48am

Math
A souvenir consisting of a cube with an inserted sphere is made to represent Earth. Both pieces are made out of solid crystal. The sphere replaces one quarter of the volume of the cube. Calculate the volume of the souvenir piece. The sphere has diameter of 4 cm and the cube ...
Wednesday, September 24, 2014 at 11:13pm

Math
The weight w of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 miles from the center of the earth), an astronaut weighs 110 pounds. Find her weight when she is 139 miles above the surface of the earth and the ...
Wednesday, September 24, 2014 at 7:44am

physics
An airplane with a speed of 53.8 m/s is climbing upward at an angle of 42° with respect to the horizontal. When the plane's altitude is 840 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point of...
Wednesday, September 24, 2014 at 1:37am

physics
If the earth doubled in mass but stayed the same size, what would be the acceleration due to gravity at the surface? m/s2 The dimensions of the earth as we currently know it are: Mass = 5.98E24 kg, Radius = 6.38E6 m and the universal gravitational constant = 6.67e-11 nm2/kg2
Tuesday, September 23, 2014 at 10:42pm

Math
A satellite will be released into an orbit of more than 400 miles above the earth. the rocket is carrying it is currently 255 miles above earth write and solve an inequality to show how much higher the rocket must climb before it releases the satellite 255+m>400 m>145
Tuesday, September 23, 2014 at 5:43pm

Calculus
A spacecraft is in an elliptical orbit around the earth. At the time t=0 hours, it is at its apogee (highest point), d=1000 km above the earth's surface. It is at its perigee (lowest point) d=100 km above the surface 50 minutes later. a. Assuming that d varies sinusoidally...
Tuesday, September 23, 2014 at 5:30pm

Science--Help.
Which of the following is NOT one of the eight most common elements in Earth’s continental crust? carbon silicon oxygen aluminum The most abundant element in Earth’s continental crust (by weight) is _____. 2. oxygen silicon calcium iron 3. The central region of an ...
Tuesday, September 23, 2014 at 11:40am

math
If the sun is aplroximantely 1.5×10^(11) meters from Earth, what is the approximate distance from Earth to Mars.
Monday, September 22, 2014 at 9:31pm

physics
A military helicopter on a training mission is flying horizontally at a speed of 75.0m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 310m . You can ignore air resistance. a:How much time is required for the bomb to reach the earth? b:How far ...
Monday, September 22, 2014 at 12:46am

Physics
Obi-Wan lands his spacecraft on an unknown planet. Visibility is poor, so he isn't able to exactly determine on which planet he has landed. He finds someone on a local communications channel and asks for directions to Earth. "You are already on Earth," is the ...
Sunday, September 21, 2014 at 9:42pm

Physics
The mass of the Earth=Mg=5.97x10^24 kg. The radius of the Earth=RE= 6.38 x10^6 m. A) What is the weight of the 75 kg person? B) Determine the acceleration due to gravity aboard a space shuttle at an altitude of 400km.
Sunday, September 21, 2014 at 9:25pm

Physics help ASAP
Suppose you are visiting a planet in a distant part of the galaxy.To determine the acceleration due to gravity on this planet, you drop a rock from a height of 55 m. The rock strikes the ground 1.9 s later.How many times greater is the acceleration due to gravity on this ...
Saturday, September 20, 2014 at 10:52pm

Physics
A particle is moving at 0.75c relative to a lab on Earth. By what percentage is the Newtonian expression for its momentum in error, i.e., how wrong is the classical formula? (The percentage error is the difference between the erroneous and correct values, divided by the ...
Saturday, September 20, 2014 at 4:58pm

physics
The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 78 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m
Saturday, September 20, 2014 at 12:12am

physics
An airplane with a speed of 85.3 m/s is climbing upward at an angle of 45.0 ° with respect to the horizontal. When the plane's altitude is 587 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
Friday, September 19, 2014 at 7:03pm

physics- HELP
An airplane with a speed of 85.3 m/s is climbing upward at an angle of 45.0 ° with respect to the horizontal. When the plane's altitude is 587 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
Friday, September 19, 2014 at 2:11pm

Adverb Objects CHECK PLEASE
Thanks for checking my answers 1. D 2. C 3. C 4. C 5. D 1. Which words make up the adverb phrase in this sentence? After his speech,the politician greeted his supporters. A. his supporters B. greeted his C. the politician D. After his speech 2. Which words make up the adverb ...
Friday, September 19, 2014 at 11:42am

physics
An airplane with a speed of 85.3 m/s is climbing upward at an angle of 45.0 ° with respect to the horizontal. When the plane's altitude is 587 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
Friday, September 19, 2014 at 3:00am

Physics
the acceleration due to gravity on the moon is 1/6 that on earth. For a projectile with an initial velocity of 15m/s upward what would be the maximum height and total time of flight on the moon and on the earth?
Thursday, September 18, 2014 at 10:31pm

science
what keeps the earth cool during the day and warm at night
Thursday, September 18, 2014 at 7:52pm

earth space science
What include things like temperature, precipitation and humidity
Thursday, September 18, 2014 at 7:42pm

english
Is these sentences are correct. Even though we have discovered thousands of dinosaur fossils, we still don’t know much about these creatures. While they dominated the earth longer than humans have, they suddenly died out for unexplained reasons.
Thursday, September 18, 2014 at 10:04am

english
Combine these four sentences using complex compound sentences. We have discovered thousands of dinosaur fossils. • We still don’t know much about these creatures. • They dominated the earth longer than humans have. • They suddenly died out for unexplained ...
Wednesday, September 17, 2014 at 11:57pm

Physics
On Earth a fit astronaut without a space suit and life support pack can leap straight up and leave the ground with an initial vertical velocity of about v1y = 2.4 m/s and rise to a height of about h = 0.24 m above the point where he first loses contact with the ground. On the ...
Wednesday, September 17, 2014 at 8:38pm

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Homework Help: Science

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