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December 20, 2014

Search: An satellite moves in a circular orbit 775 km above the Earth's surface. The period of the motion is 100.1 min.

Number of results: 47,207

Physics
Which of the following exhibits parabolic motion? a. a stone thrown into a lake b. a space shuttle orbiting Earth c. a leaf falling from a tree d. a train moving along a flat track what is parabolic motion? which would be a good choice? thanks alot for ur help
February 5, 2009 by y912f

SCIENCE
HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?
December 14, 2009 by ELIZABETH

science
HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?
December 14, 2009 by NKEM

space
How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?
September 9, 2010 by Jordan

Science
how could measuring the orbit of a comet help scientist understand when it will next be visible from earth
December 2, 2010 by Fran

science
What would be the effect on satellites now in orbit if the earth stopped rotating
February 16, 2011 by clay

scientist
How could measuring the orbit of a comet help scientists understand when it will next be visible from earth
December 1, 2011 by Malaka

science
how could measuring the orbit of a comet help scientists understand when it will next be visible from earth
January 24, 2012 by henry dennis jr

science
How could measuring the orbit of a comet help scientists understand when it will next be visible from earth?
January 24, 2012 by jakayla

scientist
how could measuring the orbit of a comet help scientists understand when it will next be visible on Earth?
October 24, 2012 by victoria

Physics
In uniform circular motion, which of the following quantities are constant: speed, instantaneous velocity, tangential velocity, radial acceleration, tangential acceleration? Which of these quantities are zero throughout the motion?
October 8, 2013 by John

calc
A kite 100 ft above the ground moves horizontally at a speed of 8 ft/s. At what rate is the angle of elevation between the string and the horizontal decreasing when 200 ft of string have been let out?
January 2, 2011 by Tom

Calculus
Here is the other. Thank you! A kite 100 ft above the ground moves horizontally at a speed of 8 ft/s. At what rate is the angle between the string and the horizontal decreasing when 200 ft of string has been let out?
October 5, 2011 by Linda

calc
A kite 80 feet above the ground moves horizontally at a speed of 8 ft/sec. At what rate is the angle between the string and the horizontal decreasing when 100 ft of string have been let out?
December 16, 2011 by need help

calculus 1
A kite 100 ft above the ground moves horizontally at a speed of 10 ft/s. At what rate is the angle (in radians) between the string and the horizontal decreasing when 200 ft of string have been let out?
February 26, 2013 by heather

physic
Hi! please help A sledge loaded with bricks has a total mass of 17.8 kg and is pulled at constant speed by a rope inclined at 20.8° above the horizontal. The sledge moves a distance of 20.6 m on a horizontal surface. The coefficient of kinetic friction between the sledge and ...
October 20, 2009 by Chan

physics
A projectile with mass of 139 kg is launched straight up from the Earth's surface with an initial speed vi. What magnitude of vi enables the projectile to just reach a maximum height of 5.8RE, measured from the center of the Earth? Ignore air friction as the projectile goes ...
February 28, 2011 by Ugandanmafia

Science
Please check my answers? My textbook won't load, so i've had to use google and guess. 1. Scientists hypothesize that the sun formed ____. (1 point) less than a billion years ago **from a cloud of gas and dust less than a million years ago from a chunk of Jupiter 2. Two of the ...
February 19, 2013 by Ava

math
The ocean covers about 71% of the Earth’s surface. If the total surface area of the Earth is about 510 million square kilometers, how many square kilometers are covered by the ocean?
March 28, 2013 by Anonymous

Physics please help
Geosynchronous satellites orbit the Earth at an altitude of about 3.58×10^7 m. Given that the Earth's radius is 6.38×10^6 m and its mass is 5.97×10^24 kg, what is the magnitude of the gravitational acceleration at the altitude of one of these satellites? Please explain as well...
June 9, 2012 by Kevin

Physics
Disk 1(of mass m) slides with speed 1.0 m/s across a low friction surface and collides with disk 2( of mass 2m) originally at rest. Disk 1 is observed to bounce off at an angle of 15degrees to its original line of motion, while disk 2 moves at an angle of 55degrees. a) What is...
November 20, 2014 by Dane

Physics
The International Space Station is 370 km above the Earth's surface (Re = 6378 km, Me = 5.98 x 10^24 kg). What is the linear velocity of the space station in m/s
January 11, 2013 by Alex

Physical science
When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the magnitude of ...
February 17, 2008 by Jenna

physical science
Which one of these statements is true about Copernicus? a. His model included planetary orbits that were circular. b. He believed that Ptolemy's ideas about the shape of orbits were correct c. His model could not account for retrograde motion of Mars. d. His model of the ...
December 15, 2011 by Fonda

Trigonometry
Wave Motion A buoy oscillates in simple harmonic motion as waves go past. At a given time it is noted that the buoy moves a total of 3.5 feet from its low point to its high point, and that it returns to its high point every 10 seconds. Write an equation that describes the ...
February 4, 2013 by AwesomeGuy

Physics
A skydiver is jumping from an airplane traveling at 10.0 m/s. The plane is 3520 m above the earth. The sky diver pulls his cord at 1760 m above the earth. Neglecting air resistance, how far does the skydiver travel horizontally before pulling the cord?
June 14, 2013 by Isis

science
object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
January 25, 2011 by bob

science
object weighs 40 N on earth's surface. it would weight on 10 N when its distance from earth's center is doubled halved tripled or quadrupled thankyou
January 25, 2011 by bob

Physics
At the Earth's surface, a projectile is launched straight up at a speed of 9.9 km/s. To what height will it rise? Ignore air resistance and the rotation of the Earth. _____m
April 29, 2014 by Joe

physics
a wheel of radius R rotates making f revolutions per second. the quantity f is know as the frecuency of the motion. show tha 1/f is the time to complete one revolution, called the period T of the motion. show that the centripetal acceleration of a point at the rim of the wheel...
November 8, 2010 by katy

physics help!!
a wheel of radius R rotates making f revolutions per second. the quantity f is know as the frecuency of the motion. show tha 1/f is the time to complete one revolution, called the period T of the motion. show that the centripetal acceleration of a point at the rim of the wheel...
November 8, 2010 by katy

physics
a boy throws a stone straight upward with an initial speed of 15 m/s on the surface of the earth. what maximum height above the starting point will the stone reach before falling back down?
September 8, 2012 by Anonymous

science
when brought to the surface of the moon will a mass have more or less weight than it did on the surface of earth or stay the same ?
October 8, 2010 by Blaire

how the earth was made
Video Guide: How the Earth was Made Section 1: 1. What did James Hutton discover as proof that the Earth was an old Earth? 2. What is the scientific explanation for how the Earth was formed? 3. What did Kelvin not take into account as far as the Earth cooling? 4. What are ...
April 14, 2010 by mido

physics
the motion of a body is described in simple harmonic motion as x=Cos(wt).when the body is 0.2m from the mid of its path , velocity is 3m/s and when it is 0.8m from the center of its path, its velocity is 1m/s ,determine: 1.the period 2.greatest acceleration
November 20, 2014 by sule

physics
The Earth rotates on its own axis once per day (24.0h). What is the tangential speed of the summit of Mt. Kilimanjaro (elevation 5895 m above sea level), which is located approximately on the equator, due to rotation of the Earth? The equatorial radius of Earth is 6378 km.
October 3, 2011 by John

physical science
Assume this asteroid has the shape of a sphere. A rock sitting on the surface of the asteroid has a weight of 100 newtons. What would the weight of this rock be if it were moved to a distance above the surface equal to the radius of the asteroid? It may be helpful to draw a ...
March 21, 2011 by aaron

Physics
If the gravitational force on you is 670N on the earth, how strong is the gravitational force on you on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0km ? Take the mass of the sun to be ms = 1.99×1030kg , the gravitational constant to be...
February 25, 2014 by Kaleb

physics
Imagine a planet that orbited the sun at a distance three times that of Earth. What would the period of that planet be in Earth years?
March 1, 2012 by becky

Science
Am I correct with my answeres below? During which hours of the day is the earth's emitted radiation highest and Why? My Answer: I think it is in the afternoon because of the increase in surface temperature. Why are values of LW^ higher in the summer than in the winter? My ...
March 9, 2009 by Mama Mia

Physics
Climbing to the top of Mount Everest is hard. But, it's slightly easier than you might think as people weigh less as they climb to the top. Let WE be a person's weight on top of Mount Everest and WS be their weight at sea level. What is the value of 1−WE/WS? Details and ...
April 22, 2013 by Bob

Math
An underground tank full of water has the shape of a circular cone with a base radius 5m and height 4m at the top. The top of the tankl is 2m below the ground-surface and is connected to the surface by a spout. Find the work required to empty the tank by pumping all of the ...
November 17, 2010 by Breona

Science
Explain the law of motion needed to solve thisproblem . On Planet Zorg, a 30 kg barbell can be lifted by only exerting a force fo 180N. What is the acceleration of gravity on Planet zorg? Predict how the motion of this object would change if on earth.
May 18, 2013 by Kye

Chemistry
The mass of the earth is known to be about 5.98 X10^24kg assume that it is approx. spherical with an average diameter of 1.276X10^7 METERS. from these data calculate the average density of the earth(g/cm^3) could the earth be made mostly of water (density=1.00g/cm^3), abundant...
August 30, 2011 by ALISON

Earth Science
Is there a direct relationship between the eccentricity of its orbit and the distance a planet is from the sun?
June 4, 2009 by Anonymous

Science
How many times did earth orbit the sun between140ce and 1543, please show work
September 1, 2011 by Katelyn

physics
The acceleration due to the moon's gravity at its surface is less than what it is here on the surface of the earth. The computed value of 1.6 m/s2 is consistent with what the Apollo Program astronauts observed during their explorations there. Imagine an astronaut holding a ...
October 2, 2013 by becca

Physics
Planet X has six times the diameter and seven times the mass of the earth. What is the ratio gX : ge of gravitational acceleration at the surface of planet X to the gravitational acceleration at the surface of the Earth?
February 4, 2013 by Maggie A.

physics
A 3.4-kg box is released on a horizontal surface with an initial speed of 4.8 m/s. It moves on the surface with a deceleration of 0.45 m/s2. Calculate the kinetic friction force on the box.
January 3, 2012 by Robert

physics
A 2.7-kg box is released on a horizontal surface with an initial speed of 2.9 m/s.It moves on the surface with a deceleration of 0.27 m/s^2.Calculate the kinetic friction force on the box
March 13, 2013 by Naesha

algebra
Write a formula that relates temperature t in degrees Fahrenheit at altitude h (in thousands of feet) and a ground temperature of 65ºF. State any restrictions on h. b. Find the temperature at 11,000 ft above Earth’s surface.
October 16, 2012 by Hailey

physics
1.Give examples of a one-dimensional motion where (a) the particle moving along positive x-direction comes to rest periodically and moves forward. (b) the particle moving along positive x-direction comes to rest periodically and moves backward. 2.Give example of a motion where...
October 14, 2012 by help me out it's urgent

Science
Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks
February 15, 2010 by Sara

Science-Help
Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks
February 15, 2010 by Sara

Algebra
An object which is dropped from 100 feet above ground falls according to the formula s = -16t^2 + 100, where s is the distance from ground level at time t. Which equation is equivalent to this formula? S-100 = t^2 ------- -16 S-100 = t^2 ------ 16 s - 100 = t^2 --- -16 or S-...
April 26, 2011 by mary

Science
What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri
February 23, 2013 by Abbey

physics
A 2.7 kg box is released on a horizontal surface with an inital speed of 2.9m/s. It moves on the surface with a deceleration of 0.27m/s^2. Calculate the kinetic friction force on the box?
May 23, 2011 by bob

Force of Gravity
How far from Earth's surface would you have to travel to be 1/4 your weight. Give your answer in Earth radii. I know you have to travel twice the distance or 1 Earth radii... I just don't know how to mathematically show it. Please help.
September 11, 2014 by Alison

physics
explain the law of motion needed to slove this problem. On Planet Zorg, a 30kg barbell can be lifted by only exerting a force of 180N. what is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change on earth.
May 18, 2013 by Kye

Physics
If the mass of a planet is 0.571 times that of the Earth and its radius is 0.787 times that of the Earth, estimate the gravitational field g at the surface of the planet. The gravitational acceleration on Earth is 9.8 m/s2. Answer in units of m/s2
October 29, 2013 by Kate

physics
A small cylinder rests on a circular turntable that is rotating clockwise at a constant speed. The cylinder is at a distance of r = 12 cm from the center of the turntable. The coefficient of static friction between the bottom of the cylinder and the surface of the turntable is...
July 10, 2013 by tom

Physics
A 0.075 kg ball in a kinetic sculpture moves at a constant speed along a motorized conveyor belt. The ball rises 1.32 m above the ground. A constant frictional force of 0.350 N acts in the direction opposite the conveyor belt's motion. What is the net work done on the ball?
December 9, 2010 by Brian

Physics-mechanics
A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of the Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth. (Show how you would calculate for density; don't just give the answer because L wan't to understand how you arrived at your answer).
December 27, 2012 by Rebecca

physics
A 215 g mass is attached to a spring and executes simple harmonic motion with a period of 0.250 s. If the total energy of the system is 2.30 J. (a) Find the force constant of the spring. 135.81 N/m (b) Find the amplitude of the motion. i just need help with what equation i ...
January 12, 2011 by julie

physics
The auroral zone is defined by the last field line from the Earth that returns to the Earth. If the field of the earth extends no further than 10RE in the sunward direction, at what angle (in degrees) in the picture above does the last field line that returns to the earth on ...
April 10, 2013 by Ruben

maths
would it be number 6? The head of an industrial machine moves in a straight line horizontally backwards and forwards from a central position. The movement can be modelled using the sine wave d = 80 sin ( pie t), where d is the horizontal distance (in cm) from the central ...
May 11, 2007 by katie

PHYSICS 1 ..lab helllpppppppp
1.described the motion of mud that flies off from a rapidly spinning wheel. 2.explain why the outer rail is higher than the inner rail of curve in a railroad track. 3. a 5kg mass is moving in a circle of a radius 3m at a speed of 30 m/sec.determine the required centripetal ...
January 28, 2013 by JORHO

physics
If the earth acceleration due to gravity on a mass of 2000kg on the earth surface is 10ms.What will be the acceleration due to gravity when it is at a point twice the radius of the earth.What is the gravitational force on it.
August 12, 2011 by Boniface

physical science
Diamonds are made 1. at the surface of earth 2. magma moving at supersonic speeds deep inside the earth 3. in river beads 4. in limestone caverns
September 17, 2009 by Clarissa

science
suggest only one best method to avoid such a collision if a near earth asteroid of radius 50m strikes the earth surface?
December 21, 2009 by sam

Mechanics:Statics
A man weighs 900N on the surface of the earth. Compare his weight in an airplane flying at an elevation of 9000m. Note that the radius of Earth is 6378km.
April 19, 2013 by Marc

science
The radius of the Earth is approximately 3,960 miles. Find the approximate surface-area-to-volume ratio of the Earth. A. 0.00025 B. 0.00076 C. 1,320 D. 11,880
July 10, 2013 by emma

physics
A 751 N diver drops from a board 9.10 m above the water’s surface. The acceleration of gravity is 9.81 m/s2 . a) Find the diver’s speed 3.00 m above the water’s surface. Answer in units of m/s.
February 11, 2011 by Anonymous

Earth Science
Why is it generally warmer in a rural area than in an urban area? I have a question: How does the earth's surface heat up or cool down? My answer: the sun heats up the earth darker surfaces are warmer than cooler surfaces. Please help.
December 19, 2007 by Lori

earth
The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 4.6 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X? Answer in units of s
September 26, 2011 by Anonymous

Physics
(a)Assuming that only gravity is acting on it, how far does an electron have to be from a proton so that its acceleration is the same as that of a freely falling object at the Earth’s surface? (b)Suppose the Earth were made up only of protons but had the same size and mass it ...
July 29, 2010 by Brian

physics
What is the linear speed of Saturn in its orbit about the sun? Give your answer in meters per second. (Consider the orbit of Saturn to be a circle of radius 1.43×1012 m and that it takes 29.50 yr for one orbit around the sun.)
September 22, 2014 by Cole Lovick

Physics HELP!!
A steel ball is hung from a vertical ideal spring where it oscillates in simple harmonic motion with a period T . At time t = 0 s, the ball is at its maximum displacement, A , from its equilibrium position. In terms of the period, at what time will the ball be at y = 0.75 A ? ...
November 30, 2011 by Kinga

Physics
A projected space station consists of a circular tube that is set rotating about its center (like a tubular bicycle tire) as shown in figure below. The circle formed by the tube has a diameter of about D = 1.28km. What must be the rotation speed (in revolutions per day) if an ...
March 1, 2013 by Anonymous

physics
It is falling. It has to fall, that is the law of gravity. Otherwise, it would leave Earth in a straight line. But if it falls at exactly the rate it needs to fall to travel in an orbit, we call that "orbiting". If if falls faster than that, it crashes into Earth. If if falls ...
August 17, 2010 by Anonymous

Earth Science
According to Kepler's law of harmonies, which planet takes the longest to orbit the Sun?
December 10, 2009 by Chris

sCiEnCe
Can you define speed, motion, constant speed and average speed? And can you get me there formulas? Ex-Distance over speed THANKS MUCH! <333 Can you define speed, motion, constant speed and average speed? And can you get me there formulas? Ex-Distance over speed THANKS MUCH...
March 4, 2007 by Jonas!

physics
a satellite can be launched into orbit through use of a specialized cannon that measured 18.0 meters in length. what would the average acceleration through this cannon have to be in order to have a muzzle velocity of 29000 km/h ?
January 30, 2011 by jafara

physics-forces
Kara (55kg) is standing next to her brother Ben (80kg) on a large piece on frictionless ice. Kara decided to push her brother with a force of 200N expecting him to slide across the ice while she remains standing in the middle of the ice rink laughing. a) Describe the motion ...
January 20, 2014 by Diane

physics
I need help finding an equation for: an asteroid revolves around the sun with a mean orbital radius twice that of Earth's. Predict the period of the asteroid in Earth years. Thank you.
December 9, 2010 by annie

physics
1. If our sun shrank in size to become a black hole, using the gravitational force equation, explain why the Earth's orbit would not be affected. 2. Strictly speaking, you weigh a tiny bit less when you are in the lobby of a massive skyscraper than you do at home. Why is this ...
July 13, 2010 by confused

physics
7.0 kg block moves in a straight line on a horizontal frictionless surface under the influence of a force that varies with position as shown below. How much work is done by the force as the block moves from the origin to x = 8.0 m?
November 2, 2012 by kunal

physics
what is the angular speed of one satellite as seen by an astronaut in another satellite?
February 21, 2012 by vivek

physics
A force of magnitude 25Nis directed at an angle of 37 deg above the horizontal moves a 10 Kg block along a horizontal surface at a constant velocity .How much work is done by this force in moaing the block a distance of 15m?
July 16, 2010 by john

physics
Halley's comet moves about the sun in an elliptical orbit with its closest approach to the SUn being .59AU and its greatest distance being 35AU (1AU=Earth-sun distance) if the comet's speed at closest approach is 54km/s what is its speed when it is farthest from the Sun? you ...
January 29, 2007 by cyndi

physics
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?
February 25, 2013 by Anonymous 007

phYSICS!!!
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?
February 26, 2013 by Anonymous 100

PHYSICS!!!
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?
February 27, 2013 by please urgently needed!!!

Physics
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?
February 27, 2013 by John

Physics
Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?
March 1, 2013 by John

Physics (Oscillation)
If a particle moves in simple harmonic motion with a frequency of 3.00 Hz and an amplitude of 5.00 cm through what total distance does the particle move during one cycle of its motion, what is its maximum speed, where does this maximum speed occur and what and where does the ...
September 8, 2010 by James

maths
The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks a lot for helping me!!^^
January 11, 2014 by ashley

earth science
Earthquakes and valcanoes change Earths surface quickly. Can you name at least two processes that canchange earhts surface slowly?
September 20, 2010 by Mia

Physics Gravity
A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1-km What must be the rotation speed (revolutions per day) if an effect equal ...
June 16, 2012 by Mike Joseph

Physics -I'm stumped
Europa, a satellite of Jupiter, appears to have an ocean beneath its icy surface. Proposals have been made to send a robotic submarine to Europa to see if there might be life there. There is no atmosphere on Europa, and we shall assume that the surface ice is thin enough that ...
November 30, 2007 by Christina

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