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 69

Heat and properties of matter
1. How much pressure do you experience, when you balance a 5kg ball on the tip of your finger which has an area of 1cm square. a. 490 kpa b. 4600 pa c. 34n d. No answer 2. Heat can be define as a. The change in the temprature of a body b. The flow of temprature from one body ... 
physics
A boxcar of mass 3.21 x 10^4 kg is rolling south at 5.16 m/s when it collides and couples with another boxcar of mass 5.18 x 10^4 kg that is rolling north at 2.38 m/s. What is the velocity of the coupled boxcars after collision? Take north as positive and express your result ... 
College Physics
In designing rotating space stations to provide for artificialgravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ... 
physics
Four tubes are set up in the lab at sea level as shown by the figure. The letter under each tube corresponds the question with the same letter. 1 atm = 101300 Pa = 101300 N/m2 ρwater = 1000 kg/m3 (a) What is the pressure pushing down on the surface of the water in tube (a... 
check geo
the use of haevy farm machinery tilling and clear cutting: A)allows farmers to reuse thier lands for decades B)causes rain forest to grow back in record numbers C)has been banned in most parts of the region scince 1995 D)causes soil erosuon and desertification my choose is d ... 
physics
calculate the free electrons of a copper wire having a 0.064 inches diameter and 1000 ft. long? 
Solid Mensuration
Find the lengths of the sides of the cylcic quadrilateral if one diagonal coincides with a diameter of a circle whose area is 36pi cm squared. The other diagonal measures 8 cm meets the fist diagonal at right angles. 
QUOTATION MARKS
When quoting two lines of poetry, what should you do? set off the lines as you would a longer quotation insert the lines the way you would any other quote, but in between the two lines of poetry, insert a slash insert the lines the way you would any other quote, but in between... 
physics
A 51.5kg skater is traveling due east at a speed of 2.70 m/s. A 69.5kg skater is moving due south at a speed of 7.50 m/s. They collide and hold on to each other after the collision, managing to move off at an angle θ south of east, with a speed of vf. Find the following. 
Physics
1) Charges of +4uC and 6uC are placed at two corners of an equilateral triangle with sides of 0.10m. At the third corner, what is the electric field magnitude created by these two charges? A]4.5 x 10e6 N/C B]3.1 x 10e6 N/C C]1.6 x 10e6 D]4.8 x 10e6 2)A +2.0 nC pont ahrge ... 
Physics
A novice golfer on the green takes three strokes to sink the ball. The successive displacements of the ball are d1 = 3.90 m to the north, d2 = 2.06 m northeast, and d3 = 1.14 m at 30.0° west of south (see the figure below). Starting at the same initial point, an expert golfer... 
9th grade
each question is 10 points each, and i don't get 4 questions. I am in Earth Science and in 9th grade i would appreciate it if some one would help me. THANKS ! Where have earthquakes occurred most frequently during the last one hundred years? 1) in the polar regions 2) in the ... 
physics
Imagine a frictionless perfectly straight tunnel which runs from Boston (USA) to Delhi (India). We release (at zero speed) an object in the tunnel in Boston. Assume that the Earth is a perfect sphere with radius 6.4*10^3 km, with a mass of 6.0*10^24 kg and that the mass ... 
physics
Imagine a frictionless perfectly straight tunnel which runs from Boston (USA) to Delhi (India). We release (at zero speed) an object in the tunnel in Boston. Assume that the Earth is a perfect sphere with radius 6.4*10^3 km, with a mass of 6.0*10^24 kg and that the mass ... 
Physics
A hydraulic press has an input cylinder 4.0cm in diameter and an output cylinder 16cm in diameter. (a) Assuming 100 percent efﬁciency, ﬁnd the force exerted by the output piston when a force of 170N is applied to the input piston. 
Science
a machine must be driven at 100 r/s from a belt pulley of 600 mm diameter revolving at 72 r/s . the maximum tensile force on the belt must not exceed 3000n .assume that the ratio of the tensile force is 2,5:1. A Diameter of the driven pulley. B the power in kW that can be ... 
physics
A block of wood weighing 10newton is placed on the horizontal table,it is then pulled by means of a spring balance attached to one of its ends,the block just begins to move when the spring balance records the horizontal force 5newton.what is the coefficient of static motion ... 
physics
A 410mwide river has a uniform flow speed of 2.0 m/s through a jungle and toward the east. An explorer wishes to leave a small clearing on the south bank and cross the river in a powerboat that moves at a constant speed of 7.9 m/s with respect to the water. There is a ... 
physics
Two masses are attracted by a gravitational force of 0.48 N. What will the force of attraction be if the distance between the two masses is halved? F_{attraction} = 
Graphic Design
5. Which of the following statements regarding the Gestalt movement is true? A. Context has a great impact on reality. B. Expressive colors replaced traditional earth tones. C. Abstract art was born. D. Reality is given more precedence than perception. 6. 
Chemistry
For the oxidationreduction reaction equation given here, 2Rb+Br2 > 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product. 
Chemistry
For the oxidationreduction reaction equation given here, 2Rb+Br2 > 2RbBr Indicate how many electrons are transferred in the formation of one formula unit of product. 
History
(PLEASE ANSWER ASAP) Read the paragraph, which may contain errors or false beliefs about the Civil War: Maryland was an important state in the Civil War. Due to its location, it was the key to the North maintaining control of its capital, Washington, D.C. Maryland formed the ... 
English
1. The south exit is close to the bus stop. 2. The south exit is close by the bus stop. 3. The south exit is near by the bus stop. 4. The south exit is nearby the bus stop. 5. The south exit is next to the bus stop. ========================= Which ones are grammatical? What ... 
Physics
An helicopter flies in a strange pattern, all at the same altitude of 5 km: 1) it flies 29 km in a direction 30.0° east of north, 2) it flies 20 km due south, and 3) it flies 10 km in a direction 30.0° north of west. How far did the helicopter end up from its starting point? 
Physics  Multiple choice
An object is moving in a circle at a constant speed. From this you can be certain that a) there are at least two forces acting on the object, which balance each other. b) there are at least two forces acting on the object, which do not balance each other c) there must be more ... 
Physical Science
Explain why a neutral atom cannot haveone proton, one neutron and two electrons? 
ALGEBRA
1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and... 
Physics
A cube has sides of length L = 0.170 m. It is placed with one corner at the origin as shown in the figure below. The electric field is not uniform but is given by = (6.00 N/C · m)x + (2.00 N/C · m)z. (a) Find the electric flux through each of the six cube faces S1, S2, S3, ... 
Physics
Two workers are sliding 310kg crate across the floor. One worker pushes forward on the crate with a force of 440N while the other pulls in the same direction with a force of 230N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ... 
physics
Two workers are sliding 330 kg crate across the floor. One worker pushes forward on the crate with a force of 410 N while the other pulls in the same direction with a force of 240 N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ... 
physics
A sled at rest is suddenly pulled in three horizontal directions at the same time, but it does not move. Paul pulls to the northeast with a force of 39 lb. Johnny pulls at an angle of 44° south of due west with a force of 68 lb. Connie pulls with a force to be determined. 1) ... 
physics
if you were stationary in space at the same distance from the sun as the eath is, how much force would the sun be exerting on you? what would be your acceleration towrd the sun? what would be the sun's acceleration toward you? okay so im a little confused where to go with this... 
Physics
A piston, A, has a diameter of .87 cm. A second piston, B, has a diameter of 5.6 cm. Determine the Force "F" necessary to support the 850 N weight in the absence of friction. 
Physics
A 49.5kg skater is traveling due east at a speed of 2.88 m/s. A 72.5kg skater is moving due south at a speed of 6.82 m/s. They collide and hold on to each other after the collision, managing to move off at an angle south of east, with a speed of vf. (a) Find the angle. (b) ... 
Science
Predict what would happen to the weather in the northeastern united states if the polar jet stream dipped to the south. How would the weather change if the jet stream moved to the north? 
physic
two force10n and20n are inclined at an angle 60 degree to each.find the resultant forces are now made to be inclined at120degree to each other,find the magnitude of the new resultant force 
Biology
1. A medical scientist is designing an experiment to test the results of a new drug that she hypothesizes will greatly reduce and possibly eliminate the side effects of a new cancer treatment. If this experiment is to be set up correctly, she must (A) divide the patients into ... 
Physics
Two point charges of magnitude 2.0 X 10^7 C and 85 X 10^8 C are placed 12 cm apart .What is the field intensity of each charge at the site of other ? 
physics
Bob has a helicopter and from the launch pad he flies the following path. First he travels from the launch pad a distance of 33 kilometers at heading 10 degrees West of North. Then he flies 18 kilometers heading 45 degrees East of South. After this he flies 14 kilometers ... 
physics
Two charges separated by one meter exert 1 Newton forces on each other. If the magnitude of each charge is doubled, the force on each charge is ______ Newtons. Thanks! 
Physics
If you reduce the distance between two point charges to one third of the original distance, the electromagnetic force changes by a factor of: 
chemistry help plz
Using the melting temperature given as guidance, state the type of bonding involved between the elements in aluminium sulfide (Al2S3). Explain how this bonding takes place with respect to the valence electrons. 
history
What was the ostensible reason for the split between Calhoun and Jackson? The Eaton affair is generally seen as a symptom, not a cause, which would indicate that the real division between the two men was much deeper. Assess the causes of the split, and speculate on its ... 
physcis
Two small beads having charges q1 and q2 are fixed so that the centers of the two beads are separated by a distance d shown in the figure. A third small bead of charge q=10.0 x 109 C is placed between both charges a distance x from q1. a) If q1 = 31.0 x 109 C, q2 = 26.0 x 10... 
science
the ratio of the inlet pistol force and outlet pistol force is 2:7.calculate the diameter of the inlet pistol if the radius of pistol one is 15cm 
metreology
Wien’s radiation law says that the wavelength of most intense radiation (λmax) emitted by a blackbody is inversely proportional to the absolute temperature (T) of the object. The surface of the Sun radiates as a blackbodyat a temperature ofT=6000 kelvins so that the Sun... 
Physics
In its own frame the average pi meson lives 2.60 x 10^8s. Suppose it moves at 0.985c relative to the Earth. According to us, on Earth, what is a pi meson's average lifetime? (b) according to us, what is the pi meson;s average travel distance before decaying? (c) If time ... 
Physics
Three forces act on the object.A 3 N force acts due west, and 4N force acts due south.If the net force on the object is zero ,what is the magnitude of the third force 
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. 
Social Studies
How did improvements in transportation, communication, farming, and manufacturing affect the economy of the North? Break down your answer by providing an example of advancement in each of the four areas. Then discuss how that improvement led to changes in the North’s economy... 
physics
The physics of electric field between two charges. What is the magnitude and direction of the electric field at a point midway between a 8.0 ìC charge and a +6.0 ìC charge? The 8.0 ìC charge is 4.0 cm to the left of the +6.0 ìC charge. If a charge of 2.0 ìC was placed ... 
Physics
Two men decide to use their cars to pull a truck stuck in mud. They attach ropes and one pulls with a force of 972 N at an angle of 28 degrees with respect to the direction in which the truck is headed, while the other car pulls with a force of 1401 N at an angle of 23 degrees... 
Physics
The potential difference between a storm cloud and the ground is 2.13 Ã— 108 V. If a bolt carrying 2 C falls from a cloud to Earth, what is the magnitude of the change of potential energy of the charge? Answer in units of J. 
Physics
Three Point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle. As the drawing shows(a) The charge at any one corner experiences forces from the charges at the other corners. Do the individual ... 
Physics
A disk of radius 0.4 cm and mass 0.7 kg is rotating at 5 rad/s. A second disk of radius 0.5 cm and mass 0.85 kg is rotating at 6 rad/s in the other direction. What is the combined angular velocity of the disks when the second disk is placed on top of the first? Should I add up... 
Math
a light shines from the top of a pole 50ft high. a ball is dropped from the same height from a point 30 ft away from the light. how fast is the ball's shadow moving along the ground 1/2 sec later? (assume the ball falls at a distance of s=16t^2 in t sec) 
Chemistry
Consider a chromiumsilver voltaic cell that is constructed such that one halfcell consists of the chromium, Cr, electrode immersed in a Cr(NO3)3 solution, and the other halfcell consists of the silver, Ag, electrode immersed in a AgNO3 solution. The two electrodes are ... 
Chemistry
When hydrochloric acid (HCl) is added to water it dissociates to form H3O+ (aq) and Cl− (aq) as shown below. HCl (aq) + H2O (l) → H3O+ (aq) + Cl− (aq) What happened to the electrons in the HCl bond? Choose the best answer. The electrons are transferred to ... 
math
How high is a tree that casts a 33 foot shadow at the same time a 6 foot pole casts a 4 foot shadow? 
more physics
a 1.00kg object is observed to accelerate at 10.0m/s∧2 in a direction 30.0 north of east. the force F2 acting on the object has magnitude 5.00 N and is directed north. determine the magnitude and direction of the force F1 acting on the object. 
Goverment junior secondary school kwanpe(G.J.S.S K.)
Find the angle between two forces P,Q which has 30N and 27 respectively if the magnitude of the resultant force is 38N 
Chemistry
Two iron bolts, one at 100. °C with a mass of 52.8g, the other at 56.0°C with a mass of 66.8g, are placed in an insulated container. Assuming the heat capacity of the container is negligible, what is the final Celsius temperature inside the container (c of iron = 0.450 J/g·K)? 
geometry
You have looked at it two times before. There are 30 questions worth 30 points. Part 1 Multiple Choice: Select the best answer from the choices provided. (Each question is worth one point) 1. Determine how many wheels are turning clockwise. 1 2 none 2. Determine how many ... 
word problem
12 is divided into two parts such that the product of the square of one part and fourth power of the other give a maximum,find the two numba 
History
1. Read the paragraph, which may contain errors or false beliefs about the Civil War: Maryland was an important state in the Civil War. Due to its location, it was the key to the North maintaining control of its capital, Washington, D.C. Maryland formed the east and north ... 
math
two sides of a triangle are given.find the angle between these two sides so that area of the triangle is maximum? 
Physics
An ocean liner leaves New York City and travels 26.9 ° north of east for 217 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions (a) due east and (b) due north? 
Physics
At a given temperature, what relationship appears to exist between a gas particle's mass and it speed? How does graph change as particle mass increase? Isra fills two identical balloons at identical temperatures. She fills one with O2 gas and the other with O3 gas. Which ... 
Science
1. groups/ family of elements are ones which: A. Have the same number of electrons in the valence/ outer engery level B. Have exactly 8 electrons in the valence shell outer energy level C. Have the same number of protons in the nucleus 2. A period represents elements which? A... 
physics
Three blocks are in contact with each other on a frictionless horizontal surface. A 696 N horizontal force is applied to the block with mass of 4.7 kg as shown in the ﬁgure below. The acceleration of gravity is 9.8 m/s 2 . 4.7 kg 5.5 kg 7.1 kg F a) What is the net force... 
science
3 charges are arranged along the xaxis. q1 = 4.50 nC is located at x = 0.200m q2 = +2.50 nC is located at x = 0.300m q3 = is a positive character located at the origin. What is the value of q3 for the net eletric force on it to be 4*10^6 N? I found the charge on q3 to be... 
Science
Which directions do lines of latitude run and what do they measure? Which direction do meridians run and what do they measure. Lines of latitude run east to west and measure north and south of the equator. Meridians run north to south and measure east to west of the equator. ... 
physics
Two cars are on a collision course. One is going right 18 m/s and has a mass of 860kg. The other is going left at 24 m/s and has a mass of 840 kg. 1. Find the total initial momentum of the two cars For this question I did first car: 860(18) = 15480 second car: 840(24) = ... 
physics
On planet x, an object weighs 10.4N. On planet B where the magnitude of the free fall acceleration is 1.48g (where g=9.8 m/s^2 is the gravitational acceleration on Earth),the object weighs 24.6N. The acceleration of gravity is 9.8 m/s^2. What is the mass of the object on Earth... 
Physic
Two blocks, m1 = 4 kg and m2 = 2 kg, are in contact with each other and are on a horizontal surface for which the coefficient of kinetic friction is 0.1. A 34 N horizontal force acts on block 1, making both blocks move in the direction of block 2. 34N > (m1)(m2) > ... 
Physics
Two strong magnets on opposite sides of a small table are shown. The longrange attractive force between the magnets keeps the lower magnet in place. Suppose the weight of the table is 26.1 N, the weight of each magnet is 8.99 N, and the magnetic force on the lower magnet is 2... 
Science  Please Check my Answer
My problem: A swimmer travels from the south end to the north end of a 30.0 m pool in 15.0 s and makes the return trip to the starting position in 19.0 s. What is the average velocity for the second half of the swim? My answer: 1.60 m/s to the south Please check! I will really... 
Social Studies
1. what happened initially when the un forces went to support south Korea? A. North Korean forces were quickly overwhelmed. B. UN forces were outnumbered and poorly supplied. C. The fighting escalated beyond the Korean borders D. South Korea did not want help from the UN ... 
physics
Two straight and parallel wires of length 1.0 m carry a current — the first carries a current of 9.0 A while the other wire carries a current of 4.0 A. What distance must separate the two straight and parallel copper wires if the force between them is to be 6.0 × 10−6 N? 
Geography
I need help with this: "This is a nation in South Asia. One of South Asia's three major rivers is in this country. The country has two climate regions, arid and semiarid and the dominant religion in this country is Islam." Which country could it be? Thanks MC 
math
four angles are put together, forming a straight angle. two of the angles are the same size. the other two angles are also the same size but different from the other two. If one of the angles is 40 degrees, what are the measures of the other three? please explain 
Math
The total resistance of two circuits in parallel is 15 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find the larger resistance 
hydraulic
a cylinder has a 3" diameter and a 17/8" diameter rod with 800psi. what is the force output of the cylinder extending and retracting 
Chemistry
You write the electron structure like this. 1s2 2s2 2p6 3s2 3p6 3d10 4s1 is the neutral Cu atom. Remove the two outside electrons to make the Cu^+2 ion. That leaves us with 3d9 as the outside and since that is an odd number, one electron must be unpaired. And you will note ... 
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. 
math
One estimate for the distance from earth to the andromeda galaxy is 2,400,000 light years. What is this distance expressed in scientigic notation? 
Science
Describe the geomorphic processes that shape the Earth’s surface. Use the Yosemite Valley to explain one or more of those processes. 
Physics
3 charges are arranged along the xaxis. q1 = 4.50 nC is located at x = 0.200m q2 = +2.50 nC is located at x = 0.300m q3 = is a positive character located at the origin. What is the value of q3 for the net eletric force on it to be 4*10^6 N? I found the charge on q3 to be... 
world geography
Where on Earth? which of the 12 northern eurasian cities will be the home of your company's newest restaurant? hint: use information from an atlas and al almanac to eliminate all but one city 
Physics
How much faster would a person be moving if they stood on top of a 18.2 m high building compared to the ground? Take the period to be one day, and the radius of the earth to be 6400 km? 
physics induced voltage
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 287 m/s over Phoenix, Arizona, at a location where the Earth's magnetic field is 50.2 µT at 58.0° below the horizontal. What voltage is generated between the wingtips? 
physics
Two large circular metal plates are parallel and nearly touching, only 4.1 mm apart. The two plates are connected to the opposite terminals of a 9 V battery. (a) What is the average electric field strength in the space between the plates? V/m (b) What is the electric force on ... 
Physics
Two forces of 2 Newton and 3 Newton act at a point so as to produce a resultant force of 4 Newton .Find: a. The angle between the directions of the 2 Newton and 3 Newton forces b.the angle between the directions of the resultant and the 3 newton force 
physics
A passenger on a ride at the firemen's field days sits in a chair and is swung around at the end of a cable connected to a central tower. At full speed, the cable makes an angle of 56 degree with the vertical, and the chair is 46 m from the pole. What is the speed of the ... 
physics
A ladder can fall for two reasons. If it is set too steep and the climber gets their mass to the left of the ladder's base, the ladder likely will fall over backwards. If the ladder is set at too shallow of an angle the required force of friction between the ladder and the ... 
science help PLS
An astronomer see a star that is very far away but still very bright. What can she conclude about the star? The star must be very large. The star must be very small. The star must be moving away from Earth. The star must be moving closer to Earth. 
science physics
a force acted upon a body by 3 given force is under equilibrium if f1 =10n and f2 =6n find f3 and angle 
math
from the top of a vertical mast 150m high,two huts on the same ground level are observed. One due east and the other due west of the mast. Their angles of depression are 60° and 45° respectively. Find the distance between the huts. Solutuons with diagram 
Calculus (Definite Integrals  Force) Please Help
A cylindrical oil storage tank 12 feet in diameter and 17feet long is lying on its side. Suppose the tank is half full of oil weighing 85 lb per cubic foot. What's the total force on one endof the tank?