# Two electrons are placed; one at north pole and other at south pole of earth. Find the force between them. Given diameter of earth= 12800 km.

117,802 results, page 77

1. ### physics

You are an astronaut (m = 90 kg) and travel to a planet that is the same mass and size as Earth, but it has a rotational period of only 15 h. What is your apparent weight at the equator of this planet?
2. ### PHYSICS FINAL (orbital)

A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
3. ### Physics

A 620 kg satellite orbits the earth where the acceleration due to gravity is 0.233 m/s^2. What is the kinetic energy of this orbiting satellite?
4. ### 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?
5. ### earth science

1) What has happened to the ice in Greenland? What does Gore say will likely happen? 2) How high does Gore say sea level will rise if nothing is done? In how many years?
6. ### ivcc

What is the magnitude of the apparent weight of a 76 astronaut 3200 from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.6 ?
7. ### earth

A satellite has a mass of 5.98*10^24 kg.if this satellite is t be placed into a circular orbit 300km above the earths surface,what speed,period and radial acceleration must it have
8. ### 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
9. ### Earth Science

I'm doing a crossword and cannot figure this last one out. The clue for it is: Application of scientific discoveries. It has 10 letters, the 5th letter is an N and the 10th letter is a Y.
10. ### Math

One model of Earth's population growth is , where t is measured in years since 1990, and P is measured in billions of people. Which of the following statements are true?
11. ### earth science? volcanoes

what kind of volcanoes are found in Iceland? Chile and Argentina? The Arabian Peninsula and the Middle East? thanks
12. ### Earth Science

Environmental Sustainability” refers to the ______________ of vital human ______________ support systems. fill in the blank
13. ### physics

Assuming you are on Earth, where acceleration due to gravity is 9.81 meters/second2, and you have a pendulum with a cord that is 0.65 meters long, what is the period?
14. ### phsics

a man weighs 1370N on earth what would he weigh on jupiter where free fall acceleration is 25.9 m/s2 the acceleration of gravity is 9.8 m/s2 in units of N
15. ### science

By studing rock layer scientist can learn about changes in earth formation and climate. True or false. Is the anser true
16. ### earth science

Earthquakes and valcanoes change Earths surface quickly. Can you name at least two processes that canchange earhts surface slowly?
17. ### Physics: How much do you way on another planet

A person weighs 900 N on Earth. What would he weigh on another planet, where the free-fall acceleration is 26.4 m/s2? Answer in units of N.
18. ### physics

You are an astronaut (m = 80 kg) and travel to a planet that is the same mass and size as Earth, but it has a rotational period of only 11 h. What is your apparent weight at the equator of this planet?
19. ### science

what are the layers of the earth's interior in order??? Please send asap I am making a science study guide for my huge exam!
20. ### Science

What are some of the effects of the sun's radiation on the earth's atmosphere including the green house effect, conduction, convection and radiation?
21. ### Earth Science

A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
22. ### Science

What are thease layers of earth made of? Crust Lower mantel outer core inner Core. and asthenospher and lithosphere
23. ### physics

which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram
24. ### earth science

if the planet is really small [compared to others, like Pluto], does that mean it has no gravity? like, would you fly on Pluto because it's gravitational pull isn't as strong?
25. ### earth science

If all matter is made up of the same atoms from the periodic table, is there a big difference between living organisms and non living objects? why or why not?
26. ### physics

which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram
27. ### Chemistry!

1. If the distance from the earth to the moon is 3.82 x 10^8 m, how many times could the paper stack reach to the MOON AND BACK? 1 mole of papers=1.505E20
28. ### Universe and Stars

As u look at the stars that re beyond and farther away, what occurs to the angle measured at earth? at what point will this method no longer work? Someone please help explain
29. ### physics

What is the angular velocity in radian per second of a satellite that has an orbital velocity of 9000 m.s^-1, orbiting at a distance of 6500 km from the center of the earth

What is the angular momentum of the Moon in its orbit around Earth in kg m2/s? I do not have any information about the moon, so I looked it up, but I got the question wrong so I don't know what values I should be using...I got 5.7 * 10^35. Thank you!
31. ### earth science

During the summer _________ in India, wet air from the Indian ocean brings heavy rain to India.
32. ### English

Choose the best action or situation. An example of a metonym for the planet earth. soil globe rock moon Answer: globe
33. ### physics

A car traveling at 53 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 65 cm (with respect to the road) while being brought to rest by an air bag. What magnitude of foce (assume constant) acts on the passengers's upper torso, which is 41 kg? I ...
34. ### Science

what the definition of age range in earth science?
35. ### Science

If a man has a mass of 90 kg on earth, what is his mass on the moon?
36. ### earth science

What does -morph stand for in science terms?
37. ### Science

Is the near side (facing earth)always the dark side?
38. ### Physics

The Moon's period of revolution around the Earth is 27.3 d. How far away is the moon?
39. ### physics

realation between earth gravity and moon gravity
40. ### Geography

which layers of the earth move? Why do ther move?
41. ### earth

What is an elipse of the sun and what is lunor elipse of the moon
42. ### Tides

What astronomical bodies are most responsible for the tides on earth?
43. ### social study

what five themes do geographers use to study the earth?
44. ### Earth science

what are the causes of groundwater contamination? How can you stop the contamination?
45. ### physics

How does your mass on Earth compare to your mass on Mars?

A passenger in the rear seat of a car moving at a steady speed is at rest relative to *the side of the road a pedestrian on the corner ahead the front seat of the car the wheels of the car A person walks 1 mile every day for excercise, leaving her porch at 9:00 a.m. and ...

A passenger in the rear seat of a car moving at a steady speed is at rest relative to *the side of the road a pedestrian on the corner ahead the front seat of the car the wheels of the car A person walks 1 mile every day for excercise, leaving her porch at 9:00 a.m. and ...
48. ### ENG102

Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running north-east with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average velocity in km/h . SOLVE ...
49. ### Alegebra 1

If all the vertices of a triangle are on the circle and one side of the triangle is the diameter of the circle it is a right angle. Find the length of the diameter (AC) if Ab =8 and BC = 15.
50. ### math

a diameter of a sphere can be measured with a maximum error of 0.2cm . Find the corresponding error volume of a sphere whose diameter is 90 cm.
51. ### College Physics - fixed again!

A positive and a negative charge are positioned as shown: + | |_______ - The distance from - to corner is 4.00m and the distance from corner to + is 3.00m. Q1 = 4.00 microCoulomb Q2 = -4.00 microCoulomb 1. What is the distance between the charges? 2. What is the angle of West ...
52. ### College Physics - fixed

A positive and a negative charge are positioned as shown: + | - _______| The distance from - to corner is 4.00m and the distance from corner to + is 3.00m. Q1 = 4.00 microCoulomb Q2 = -4.00 microCoulomb 1. What is the distance between the charges? 2. What is the angle of West ...
53. ### science

A pipe of diameter 80mm is fitted with a branch section into which fit two pipes of equal diameter. If it is desired that the velocity remain constant throughout, determine the required diameter of each of the branch pipes.
54. ### chemistry

Dr Bob Could you check this please? Voltaic cell---cathode is positive, accepts electrons, reduced, anode is negative, gives up electrons and is oxidized Electrolytic cell------cathode is negative, accepts electrons and is reduced. Anode is positive, givesup electrons and is ...
55. ### science

these are all very confusing for me 1. Explain 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 period not really ...
56. ### Biology

These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ...
57. ### Biology

These are true and false questions and I want to be sure of my answers. Please someone check. Thanks: The eight-element periodicity found in the Periodic Table is related to the number of electrons in the outermost energy level of the atoms that make up each element. True 2. ...
58. ### Chemistry

Free sulfur may act as either an oxidizing agent or a reducing agent. What is the best experimental evidence for this statement? (A) Sulfur forms sulfur dioxide as well as calcium sulfide. (B) Sulfur is a nonmetal. (C) Sulfur forms both organic and inorganic compounds. (D) ...
59. ### Physics I (Classical)

A kayaker needs to paddle north across a 85-m-wide harbor. The tide is going out, creating a tidal current that flows to the east at 2.0 m/s. The kayaker can paddle with a speed of 3.0 m/s. Find the angle West of North he needs to travel and the time it takes him to cross. ...
60. ### physics

A PARTICLE OF MASS M IS SHOT WITH an initial velocity v making an angle b with the horizontal,the particle moves in the gravitational field of the earth. find the angular momentum of the particle about the origin when the particle is at the origin ,at the highest point of its ...
61. ### 8th grd chemistry:D

which of these statements is true about an atom of chromium? (A) has more protons then electrons. (B) has fewer parts than an atom of iron. (C) has an atomic number of 51.996. (D) has more electrons than neutrons.
62. ### physical science

Electrons are emitted from a conductor when the conductor is A. subjected to a small voltage. B. exposed to weak light. C. bombarded by high-speed electrons. D. cooled rapidly.
63. ### chemistry

how do u draw the lewis structure for something like CO -2 over 3. do u add 2 electrons on to the oxygen when yur finding the number of valence electrons cuz that's wat i thought u did but then i got all those questions wrong so wat do u do
64. ### Physics

Can please help me understand this question? A capacitor has a capacitance of 2.0 10-8 F. In the charging process, electrons are removed from one plate and placed on the other plate. When the potential difference between the plates is 540 V, how many electrons have been ...
65. ### Algebra

A lawyer drives from herâ€‹ home, located 8 miles east and 17 miles north of the townâ€‹ courthouse, to herâ€‹ office, located 2 miles west and 7 miles south of the courthouse. Find the distance between theâ€‹ lawyer's home and her office.
66. ### 11th garde physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 17 m long. a)work done by the applied force=? b)...
67. ### Physics

A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 14 m long. work done by the applied force work ...
68. ### Cosine Law

For the next three questions, choose which is the most appropriate method to solve the problem, explain your answer. a) SOACAHTOA b) The Sine Law c) The Cosine Law d) The problem cannot be solved without further information 1) Yachts in a race have to sail a triangular course...
69. ### Physics

an 80 kg physics student is riding the cajun cliffhanger. this ride had a diameter of 8.0m (u:0.06)the ride produces enough centripetal force to suspend a student. 1.what is the force of friction to keep the student suspended? 2.what normal force is required to generate the ...
70. ### physics

Use the period of the earth (2.34 y), its mean orbital radius (1.496 × 1011 m), and the universal gravitational constant (6.673 × 10−11 N · m2/kg2) to calculate the mass of sun. Answer in units of kg.
71. ### Astronomy

The gravity lock of the Moon to Earth is silimar to the action of a A) giant pendulum B) spinning top C) master key D) tidal wave E) magnetic compass I'm torn between A and E.
72. ### science

scientists believe that the waters covering the surface of the earth. a)are a recent addition to our planet b) first appeared during the age of dinosaurs c) have been here since the crust solidified d) are slowly drying up e) are not visible from space c
73. ### science

tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had sunlight 24 hours a day. Include such things as how this would affect your sleep, work, school and crime.

which pair of basic questions guides geographers in their work? where are things located? and Why are they there? **** What is the climate? and Why was it changed? When did Earth form? and What is it made of? Who lived where? and When did they move?
75. ### Science

Which of these would cause a rapid change in the appearance of the Earth's surface? A. Erosion and deposition by a river B. Earthquake C. Summer waves on Galveston's beach D. Weathering of rocks by acid rain
76. ### Science

What does Asimov predict will happen to earth in billions of years? a. it will be burned up by the sun b. its population will increase*** c. it will shrink slightly in size d. it will change position in the galaxy Am I correct?
77. ### science

Scientists believe that the waters covering the surface of the earth? a) are not visible from space b) are slowly drying up c) first appeared during the age of dinosaurs d) are a recent addition to our planet e) have been here since the crust solidified
78. ### biology - natural selection

Which of these is the foundation for relative dating? A. Earth is very old. B. Deeper rock strata are older. C. Radioisotopes decay at a constant rate. D. Organisms can be closely related to each other.
79. ### Geography and Society

What is the primary function of Earth's atmosphere? a. to trap heat from the sun b. to shield the planet from harmful radiation*** c. to disintegrate space debris before it reaches the surface d. all of the above
80. ### Science

Why is the human population of the Earth still growing rapidly even though birth rates have begun to fall slightly? Due to better health and medical advancements, people are living longer.
81. ### Biology

Some questions on a review that I have no idea! Describe what the earth looked like when it first formed? Why was the presence of oxygen so important keep in mind aerobic,anaerobic respiration and the amount of ATP produced?
82. ### physics

the gravitational field strength at the earth's surface is 10n/kg. calculate the wight of the following: A. a person of mass 80kg B. a 2kg bag of sugar C. a 125kg pack of tea
83. ### Trig

mercury rotates around the sun in approx. 89 earth days (or 7,689,600 s. use a calculator to approximate its angular speed. choices: 4.09x10^-7 0.035 0.071 8.17x10^-7
84. ### PHYSICS

The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below?
85. ### Science in motion pHY 102

Find the net force produced by a 30-N force and a 20-N force in each of these cases: (a) Both forces act in the same direction. The net force produced by 30-N force is 60-N The net force produced by 20-N force is 40=N Applied Forces Net Forces 30-N = 60-N 30-N
86. ### Math

A boat travels 74 miles on a course with direction 34 degrees and then changes its course to travel 58 miles at 53 degrees. How far north and how far east has the boat traveled on its 132-mile trip? A 87.7 miles east and 44.3 miles north B 35.7 miles east and 96.3 miles north ...
87. ### physics problems

please check my answers. 17. explain how the sport of pole vaulting dramatically changed when flexible fiberglass poles replaced still wodden poles? -the fiberglass poles had more momentum and PE than still wooden poles? 20. does the international space station have ...
88. ### physics

An object moves along a circular path with a constant speed, |⃗vo|. (Semi Circle with point A on one side point B on the other. Looks like a 90 degree angle with points A and B on either side of the hypotenuse.) The average acceleration in going from A to B is 1. zero 2...
89. ### 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 (...
90. ### physics

Using trigonometry A patients leg is raised at an angle of 45 degrees and a traction force of 50N is applied in line with the leg; Find the vertical component of this force? Find the horizontal component of this force?
91. ### History!

***IGNORE THE CHARTS/GRAPH QUESTIONS!! UNLESS YOU KNOW THE ANSWER OR HAVE SEEN THE CHARTS! THANKS!! :) *** For whom was South Carolina named? (1 point) Queen Caroline King Charles I**** King Charles II Queen Elizabeth 2. What is an important reason to study the history of a ...
92. ### physics

The force shown in the force vs. time diagram in the figure below acts on a 1.10 kg object. Find: (a) the impulse of the force exerted on the ball.
93. ### Physics Energy and Work Done

A 390-N child is in a swing that is attached to a pair of ropes 1.9 m long. Find the gravitational potential energy (in JOULES) of the child–Earth system relative to the child's lowest position at the following times. A) when the ropes are horizontal B) when the ropes make a...
94. ### physics

A communications satellite is in an orbit that is 3.1 multiplied by 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.6 ...
95. ### Physics

A car drives north on highway at 40km/h and then turns back and drives south back to the strating point at 60 km/h, what is the avarge speed of the car?
96. ### calculus

At 1:00 p.m. ship A is 25 km due north of ship B. If ship A is sailing west at a rate of 16km/h and ship B is sailing south at 20km/h What is the first time after 3:00 p.m. that the hands of the clock are together?
97. ### Science

1. How did plantesmals form plants A. They broke into smaller chunks B. They collided and stuck together** C. They cooled and pulled ice together D. They began to rotate 2. Whats the distance used to define the astronomical unit A. The average distance across the sun its ...
98. ### social studies

How did the Fugitive Slave Act and the Kansas-Nebraska Act further divide the North and South? What role did the concept of popular sovereignty play in these conflicts? Do you think there was any way to avoid the violence that came out of this era? pls help me with these 3 ...
99. ### Economics

In recent years, talk has risen and ebbed about creating a FTAA (Free Trade Area of the Americas), encompassing countries in North, Central and South America. Based on the successes and failures of NAFTA evaluate whether the United States should participate in such an FTAA.
100. ### Physics

A force of 112 N acts on 35 kg box which moves at a steady speed across the floor. The force is directed 40 degrees above the ground. How to state Newton's second law using x components and y components? x: -Fa(cos40) -Ff=ma and y: -Fa(sin40)+Fn-Fg=0? How do you calculate ...