Recent Homework Questions About Earth
Two facts: A freely falling object at Earths surface drops vertically 5 m in 1 s. Earths curvature drops 5 m for each 8-km tangent. Discuss how these two facts relate to the 8-km/s speed necessary to orbit Earth.
Monday, September 23, 2013 at 8:06pm
Earth Space(soon please!)
Hypothetically, how hot do you think a green star would be?
Monday, September 23, 2013 at 7:48pm
Okk so im not asking for answers, i just need somone to expplain this homework to me! I dont get it what so ever. So the homework tittle is Weight in space. So it has a whole discripition in wjich i will write dpwn for you. The paper says: Gravity is an invisible force that ...
Monday, September 23, 2013 at 4:35pm
the earth is approximately sphere of radius 6.37*10^6 meter.what is its surface area in square km? what is its volume in cubic km?
Monday, September 23, 2013 at 12:44pm
The Period T, in seconds, of a pendulum depends on the distance, L, in meters, between the pivot and the pendulum's centre of mass. If the initial swing angle is relatively small, the period is given by the radical function T=2pi(sqrtL/g) where g represents acceleration ...
Friday, September 20, 2013 at 9:32pm
On earth, two parts of a space probe weigh 17300 N and 3260 N. These parts are separated by a center-to-center distance of 19.4 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
Friday, September 20, 2013 at 2:42pm
What is the size, i.e. the radius, of a black hole with a mass equal to that of Earth (MEarth=6×1024kg)? Give your answer to one significant figure.
Tuesday, September 17, 2013 at 10:07pm
What challenges do specialized magazines such as Mother Earth News face hen trying to entice advertisers? Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.
Tuesday, September 17, 2013 at 7:33pm
yes i solve it like this but we will not need the speed of the earth ?
Tuesday, September 17, 2013 at 9:03am
You know the mass of earth, and a well known principle (accept it) that for symetrical distributions, you can consider that mass at the center of a sphere. g=G*Mass/r^2
Tuesday, September 17, 2013 at 8:01am
Monday, September 16, 2013 at 5:24pm
A map suggests that Atlanta is 730 miles in a direction 5.00° north of east from Dallas. The same map shows that Chicago is 560 miles in a direction 21.0° west of north from Atlanta. The figure below shows the location of these three cities. Modeling the Earth as flat...
Sunday, September 15, 2013 at 7:23pm
a rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 381,000 km?
Sunday, September 15, 2013 at 11:52am
An earth embankment is 27 m long and has a cross-section shown in the diagram. Find the volume of earth needed to build the embankment.
Sunday, September 15, 2013 at 8:05am
Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the entire ...
Friday, September 13, 2013 at 11:52pm
5th grade math
The moon is about 240.000 miles from earth. What is this distance written as a whole number multiplied by a power of ten
Thursday, September 13, 2012 at 9:11pm
Friday, January 20, 2012 at 6:19pm