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.
225,384 results, page 17

phy
(Q1)At what altitude above the earth's surface would the acceleration due to gravity be 4.9m/s2?Assuming the mean radius of the earth is 64000000meters and the acceleration due to gravity 9.8m/s2 on the surface of the earth (a)26000000m(b)323000000m(c)465000000m(d)776000000m... 
Physics & Gravity
The acceleration due to gravity on the moon is about onesixth its value on earth. If a baseball reaches a height of 51 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 would ... 
Calc
Newton's Law of Gravitation says that the magnitude F of the force exerted by a body of mass m on a body of mass M is the following. F=(GmM)/r^2 Here G is the gravitational constant and r is the distance between the bodies. (a) Find dF/dr (b) Suppose it is known that Earth ... 
Science
Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot enough to heat Earth... 
Physics
What potential energy does a 60.0kg gymnast acquire in climbing 5.00 m up a vertical pole? GIVEN: mg = 60 h/d = 5.00 m PE = mgh PE = (60)(5.00) PE = 300 J 
physics
A person is standing at the edge of the water and looking out at the ocean (see the drawing). The height of the person’s eyes above the water is h=1.6 m, and the radius of the earth is R=6.38x10^6 m (use as a precise value). (1) How far is it to the horizon (in meters, use ... 
Momentum
A 8.4 kg laundry bag is dropped from rest at an initial height of 7.00 m. (a) What is the speed of Earth toward the bag just before the bag hits the ground? Use the value 5.98 1024 kg as the mass of Earth. (b) Use your answer to part (a) to justify disregarding the motion of ... 
Earth Science
Describe how Earth would be different today if. It contained no radioactive material. What would the consequences be for the Earth's interior layer? 
college, Astronomy
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 13 Earth radii from Earth's center? 
Earth Science
Describe how Earth would be different today if it contained no radioactive material. What would the consequences be for the Earth’s interior layers? 
PHYSICS
Search: a 1.0 kg mass weighs 9.8 n on earths surface and the radius of the earth is roughly 6.4x10 to the 6 m. what is the mass of the earth and the average density of Earth 
Astronomy
Jupiter is farther from the sun than is the Earth. In the course of several earth years what phases would you expect jupiter to exhibit to an observer on earth. explain 
earth
A distant galaxy is simultaneously rotating and receding from the earth. As the drawing shows, the galactic center is receding from the earth at a relative speed of uG = 1.7 x 106 m/s 
Physics
The gravitational acceleration on the surface of Mercury is 0.38 times that of Earth. Its radius is also about 0.38 times that of the Earth. What is the ratio of the density of Mars to that of Earth? 
Physics
A satellite of the Earth has a mass of 1550 kg. It orbits Earth with a mean radius of orbit of 7.00 x 10^6 m. a) What is the gravitational potential energy of the satellite with respect to Earth? 
science
suggest only one best method to avoid such a collision if an earth asteroid strikes earth surface? 
physics
a bag of sugar weighs 5.00 lb on earth. What would it weigh in newton on the moon, where the free fall is onesixth that of the earth? 
Math
A 15 m flagpole stands on level ground. from point P, due west of the flagpole the angle of elevation of the top of the pole is 38 degrees. From point Q, due north of the flagpole, the flagpole has an angle of elevation of 25 degrees. Find the distance of PQ, correct to one ... 
Physics
Maya follows a maze by going: 3 m north, 2 m west, 1 m south, 1 m west, 2 m north, 6 m east, and 2 m north. What is her final displacement in a north/south direction. 
physics
A pendulum has a period of 0.9 s period on Earth. An object is suspended from a spring with force constant 9.8 N/m. (d)Find the mass suspended from this spring that would result in a period of 0.9 s on Earth 
Science , Earth , Waterce , Earth , Waterce
How can I answer this question? Draw an overall conclusion: how does water compare to other substances? Why do you think so? Please help me... 
math
The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W). Find (a) The distance between the two towns in (i) Kilometers ( take the radius of the earth as 63711) (ii) Nautical miles ( take I nautical mile to be 1.85 km) (b) ... 
maath algegra 5
force of gravity on Earth is 6 times greater than on the moon. As a result, objects weigh 6 times as much on Earth as they do on the moon. A scientific instrument weighs 34 pounds on the moon. How much does the instrument weigh on Earth 
Physics
A rocket starts from rest and moves upward from the surface of the earth. For the first 10s of its motion, the vertical acceleration of the rocket is given by a_y =( 2.70m/s^3)t, where the +ydirection is upward. 1) What is the height of the rocket above the surface of the ... 
Math
The distance, "d", to the horizon (= farthest point on the earth still visible) for an object that is "h" miles above the surface of the earth is given the formula d = the square root of 8000h +h^2. Determine how many miles above the surface of the earth is an orbiting ... 
science
an imaginary dense star Z has 1/5 the radius of earth, but 1000 times earth's mass. How much would a masss weighing 1.0 N on earth weigh on Star z 
ALGEBRA
A satalites escape velocity is 6.5 mi/sec, the radius of the earth is 3960 miles and the earth's gravitational constant(g) is 32.2 ft/sec^2 How far is the satelite from the surface of the earth? 
science
How much below the surface of the earth does the acceleration due to gravity become 1percent of its value at the earth surface? The earth is assume to be a sphere of radius 6.4×10^6m. 
Astronomy
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 13 Earth radii from Earth's center? 
Physics
Using the fact that a 1.0 kg mass weighs 9.8N on the surface of the earth and the radius of the earth is roughly 6.4x10^8m. calculate the mass of the earth. 
Physics
The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s electric ... 
Earth Science
Using the plate tectonic theory explain the differences between the continental shelves on the east and west coasts of South America. 
Physics
Two carts of identical mass (500 kg). One is traveling south and the other is traveling east. They collide (inelastic collision) and slide 3 meters, 30 degrees south of the east. The total friction force is 10,000N. Calculate the initial velocities of each. 
Physics
Suppose a planet is discovered orbiting a distant star with 13 times the mass of the Earth and 1/13 its radius. How does the escape speed on this planet compare with that of the Earth? Ve new  = ve earth 
physics
The value of g at Earth’s surface is about 9.8 m/s^2. If Earth were of uniform density (same mass/volume throughout), what would the value of g be inside Earth at half its radius? 
Maths
As observed from the top of the light house of height 'h'm .The angles of depression of two ships approaching it are p and q.If one ship is coming from west and other is coming from south.Find the distance between two ships in terms of a. 
history
After the Revolution, the practice of a.enslaving African Americans was b.eliminated in the North. [c].restricted in the North and the South. d.encouraged in the North. abolished in the South 
History
I need to find a little more information about the differences between the North and South where it concerns the political and economic situation. Here is what I have: Policital, the North had an oppresive government. The South , the government, was subject to royal governors ... 
Physics
When an item has been launched into orbit, what happens? 1: It continues to fall but its path never reaches the ground. 2: Centripetal force from Earth's gravity keeps it from being accelerated toward Earth. 3: It no longer falls because the weakness of Earth's gravity with ... 
Physics
The space shuttle is in a 3e+5 m high orbit over the earth. The radius of the earth is 6.37e+6 m, the mass of the earth is 5.98e+24 kg. What is the distance from the center of the earth to the space shuttle? I don't know whether I would double the radius and the add the height... 
physics
The volume of the Earth's oceans is approximately 1.4×1018 m3. The Earth's radius is 6.4×106 m. What percentage of the Earth, by volume, is ocean? 
physics
The mass of the Mars is about 0.11 the mass of the earth, its radius is 0.53 that of the earth, and the acceleration due to gravity at the earth's surface is 9.80 {\rm m}/{\rm s}^{2}. 
Physics
You weigh 526 N on earth. Planet X has twice the mass of Earth and the radius of Earth . What is your weight in newtons on planet X? 
AP Physics
A light string that is attached to a large block of mass 4m passes over a pulley with negligible rotational inertia and is wrapped around a vertical pole of radius r. The system is released from rest, and as the block descends the string unwinds and the vertical pole with its ... 
Physics
Two 18.0 cm diameter charged rings face each other, 22.0 cm apart. The left ring is charged to + 40.0 nC and the right ring is charged to + 15.0 nC. What is the force on a + 0.50 nC charge placed at the mid point? 
Physics Problem 6.20
The center of a 1.10 diameter spherical pocket of oil is 1.10 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 8.0*10^2kg/m^3. Δg/g = ? % 
Physics
The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3. Solve for delta g/ g = % 
Physics
The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3. Solve for delta g/ g = % 
Physics
Three boxes A, B, and C are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the magnitude of the contact force between each pair of boxes. Here mA = 6.90 kg, mB = 3.80 kg, and mC = 1.50 kg. contact force between... 
Science
How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent? 
LA
How did the Civil War affect the Northern and Southern economies? A;The North experienced more severe inflation than the South. B;Overall the South fared much worse economically than the North. C;The South experienced a boom in manufacturing. D;The North's economy was ... 
Science
How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences. 
physics
A bag of sugar weighs 6.00 lb on Earth. What would it weigh in newtons on the Moon, where the freefall acceleration is onesixth that on Earth? 
physics
A loaf of bread weighs 3.9 N on earth. What should it weigh, in newtons, on the moon, where the acceleration due to gravity is onesixth that on Earth? 
phy
A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. how high above earth? acceleration? 
Physics
A bag of sugar weighs 6.70 lb on Earth. a) What would it weigh in newtons on the Moon, where the freefall acceleration is one sixth that on Earth? 
Earth's Heat Resources
list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to. 
Earth's Heat Resources
list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to. 
earth
a satellite orbits the earth in circular orbit 620 km above the suface. if the radius of the earth is 6380 km, calculate, to 3 significanf figures, the distance travelled in a single orbit? 
Physics
Use 5.98 × 10 24 kg as the mass of the Earth. A 2350 kg meteorite has a speed of 143 m/s just before colliding headon with the Earth. Determine the recoil speed of the Earth. Answer in units of m/s 
science
The main cause of the changing location of the tides on earth is rotation of the Earth on its' own axis  magnetic forces of the Moon  the revolution of the Moon around the Earth *** the position of the Sun 
physics
The furthest distance from the Sun to Earth is df=1.521E8 The shortest distance from the Sun to Earth is ds=1.47E8 To simplify the problem, assume that the Earth's axis is always perpendicular to the plane of its trajectory around the Sun. The Sun always shines on half of the ... 
ALGEBRA
The force of gravity on Earth is 6 times greater than on the moon. As a result, objects weigh 6 times as much on Earth as they do on the moon. A scientific instrument weighs 34 pounds on the moon. How much does the instrument weigh on Earth? 
physics
An accelerating voltage of 2.46 * 10^3 V is applied to an electron gun, producing a beam of electrons originally traveling horizontally north in vacuum toward the center of a viewing screen 34.0 cm away. What is the magnitude of the deflection on the screen caused by the ... 
physics
Hint: for part I use G = 6.67 times 10 to the negative 11. for part II, you don’t need to do the full calculation, you can just use your knowledge of how force of gravity depends on mass and separation distance. Compare the gravitational force on a 49 kg mass at the surface ... 
PHYSICS HELP!
1. A 125gram projectile strikes a 1.45 kg block that's attached to a massless vertical pole & becomes embedded in the block causing the bullet & block to swing upward. The overall length of the pole & the block combined is 1.1m. The bullet & block at the highest point makes a... 
Science
occurs when the moon passes between the sun and the earth, and the shadow of the moon falls on earth. 
Physics
A 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. Find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. Earth’s mass is 6.0 × 1024 kg. Show all your work, ... 
overland high school
the gravitional force exerted on objects on the moon is about 1/6 that of earth. if an object weighs 240 newtons on the moon, on earth it would weigh _________.show work 
physic
During fair weather, an electric field of about 100 N/C points vertically downward into the earth's atmosphere. Assuming that this field arises from charge distributed in a spherically symmetric manner over the surface of the earth, determine the net charge of the earth and ... 
Math
Q. In a decrement timed drill, at the sound of a fire alarm it took a fire fighter 9.5 seconds to reach the Fire pole, 3.2 seconds to slide down the pole, 13.6 to put on protective gear, 5.7 to climb aboard the truck. How long did it take the fighter to be ready and aboard the... 
physics
Two blocks of masses m1 = 4.00 kg and m2 = 3.00 kg are placed in contact with each other on a frictionless horizontal surface. A constant force F = 9.00 N is applied to the block of mass m1. a) Determine the magnitude of the acceleration of the twoblock system. b) Determine ... 
physics
a satellite makes 10 revolutions per day around the earth.find its distance from the surface of the earth. 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure. 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure. 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure. 
Physics
The radius of the earth is 6.37*10^6 m and its mass is 5.975*10^24 kg. Find the earth's average density to appropriate significant figure. 
physics....
1) Yellow light that has a wavelength of 560 nm passes through two narrow slits that are 0.300 mm apart. An interference pattern is produced on a screen 160 cm distant. What is the location of the firstorder maximum? 2) A communication satellite is orbiting 36 000 km above ... 
physics
Two charges are placed on the x axis. One of the charges (q1 = +6.14C) is at x1 = +3.00 cm and the other (q2 = 28.6C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm. 
physics
Help! Two charges are placed on the x axis. One of the charges (q1 = +8.71C) is at x1 = +3.00 cm and the other (q2 = 28.6C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm. 
physics
Two charges are placed on the x axis. One of the charges (q1 = +7.91C) is at x1 = +3.00 cm and the other (q2 = 27.3C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm. 
Physics
Two charges are placed on the x axis. One of the charges (q1 = +5.44C) is at x1 = +3.00 cm and the other (q2 = 27.7C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm. 
Science
Which statement correctly describes the sun and earth? a. the sun and earth both have water. b. the sun and earth both have a surface called the crust. c. the sun and earth both have an atmosphere d. the sun and earth both have breathable air 
Physics
Two satellites are in circular orbits around the earth. The orbit for satellite A is at a height of 360 km above the earth's surface, while that for satellite B is at a height of 720 km. Find the orbital speed for each satellite. 
Physics
An electrostatic force of 5 N exists between two identical point charges, each of mass 0.01 g, placed 4 mm apart. a.) Find the magnitude of each charge. b.) One of these charges is placed into a magnetic field. Assuming that the charge has a speed of 50 m/s and travels a ... 
electric physics
Near Earth, the density of protons in the solar wind (a stream of particles from the Sun) is 12.4 cm3, and their speed is 576 km/s. (a) Find the current density of these protons. (b) If Earth's magnetic field did not deflect the protons, what total current in amperes Earth ... 
PHYSICSNet external Force
1. Two tugboats pull a barge across the harbor. one boat exerts of force of 7.5 x 10^4 N North, while the second boat exerts a force of 9.5 x 10^4 N at 15.0 degrees north of west. Precisely, in what direction does the barge move? 2. A traffic signal is supported by two cables... 
Physics
A canoe has a velocity of 0.480m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity (V(C/R)) of the canoe relative to the river. Also, find the direction of the velocity of the ... 
Physics
You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^19 C, m= 1.67x10^27 1 have used ... 
Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you 
Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you 
physics
Suppose a person weighs 160 pounds on Earth. How much would that person weigh on a planet that was three times as massive as Earth and had a radius that was twice that of Earth's? 
physics
i cant solve this problem i need for help please through how many does a point on the earth's surface move in 6h as a result of the earth's rotation ? what is the speed of a point on the equator ? take the radian of the earth to be 6370 km thank you 
physics
i cant solve this problem i need for help please through how many does a point on the earth's surface move in 6h as a result of the earth's rotation ? what is the speed of a point on the equator ? take the radian of the earth to be 6370 km thank you 
math
Earth exerts a force on an object equal to the objects weight. the object exerts a force on earth I think the answer is it equal zero? 
physics
The center of a 1.00km diameter spherical pocket of oil is 1.00kkm beneath the Earth's surface. Estimate by what percentage g directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 8.0*10^2kg/m^3. Δg/g = ? % 
English
In the story “If I Forget Thee, Oh Earth…” why did Marvin’s father take him to see the view of earth from The Colony? A. The Colony had just discovered earth as a new planet in their galaxy, and he wanted to share the exciting news. B. He wanted Marvin to understand ... 
physics
A 316kg boat is sailing 12.0° north of east at a speed of 1.60 m/s. 39.0 s later, it is sailing 36.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.4N force directed 12.0° north of east (due to an auxiliary engine), a 20.7N ... 
physics
The value of g at the Earth's surface is about 9.8 m/s2. What is the value of g at a distance from the Earth's center that is 9.5 times the Earth's radius? 
earth
At what height above the earth surface will an austranouts experience only half the gravitation that he experience on earth