4. An observer is near a river and wants to calculate the distance across the river. He measures the angle between his observations of two points on the shore, one on his side and one on the other side, to

50,353 results
  1. History! Help!

    The Atakapans occupied the region from the Sabine river to the A. San Jacinto river B. Red river C. Colorado river D. Trinity river Both the Karankawa and Atakapans relied heavily on which resources? A.rival groups B.fish and shellfish C.settlers D.trees

  2. physics

    A river flows due east at 1.50 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 9.2 m/s due north relative to the water. (a) What is the velocity of the boat as viewed by an observer on the shore?

  3. Physics

    A surveyor measures the distance across a straight river by the following methods: Starting directly across from a tree on the opposite bank, she walks 249 m along the river bank to establish a baseline. Then she sights across to the tree. The angle from

  4. Physics

    A boat starting on one side of the river heads to the south with a speed of 1.5 m/s, the river flows to the east at .8 m/s. What is the resultant velocity to the side of the river? And if the river is 50 m wide calculate the displacement of the boat

  5. Physics

    A motorboat heads due east at 8.5 m/s across a river that flows to the south at a speed of 2.5 m/s. a. What is the velocity of the boat relative to a stationary observer on the shore? B. If the river is 1360 m wide, how long does it take the boat to cross

  6. Math

    Multiply & write in simplest form: The mississippi river is about 23/25 the length of the missouri river. If the missouri river is 2,540 miles long, how long is the mississippi river? Thanks

  7. History

    The Atakapans occupied the region from the Sabine river to the A. San Jacinto river*** B. Red river C. Colorado river D. Trinity river Both the Karankawa and Atakapans relied heavily on which resources? A.rival groups B.fish and shellfish*** C.settlers

  8. Math

    Find the distance, d across the river. Assume the ratio of d to 75 ft is the same as the ratio of 40 ft to 20 ft. The distance across the river is _____ feet. is it 37.50?

  9. Physics

    A river flows at a speed of 4.60 m/s. A boat, capable of moving with a speed of 5.80 m/s in still water is rowed across the river at an angle of 53.0° to the river flow. Calculate the resultant velocity with which the boat moves and the angle that its

  10. social studies

    1.How have humans negatively impacted the water system of Arkansas? Select all that apply a.The construction of the MKARNS has resulted in more flooding. b.Chemicals and runoff from industry harm wildlife. c.Too much trade along the rivers damages the

  11. Physics

    A boat attempts to cross a 172 m wide river to reach a dock directly on the other side. The boat heads out directly across the river, perpendicular to the bank, with the motor propelling it at 16 m/s across the water, but he river flowing at 5.4 m/s

  12. math :(

    An observer stands on the edge of a 375 m high cliff. Below him is a river. He estimates that the angle of depression to the near bank of the river is 80° and the angle of depression to the far bank is 60°. Find the width of the river to the nearest

  13. Physics

    A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S]. A) if the river is 100 m wide, what is the quickest time that she can swim the entire width? B) how far downstream will she be? C) if she decides to go

  14. Physics

    A woman and her dog are out for a morning run to the river, which is located 4.56 km away. The woman runs at 3.27 m/s in a straight line. The dog is unleashed and runs back and forth at 5.23 m/s between his owner and the river, until she reaches the river.

  15. world history -geography

    What river near the city of Manaus is a tributary of the Amazon River? Is it the Negro River or the Solimoes river because they both look like they are tributaries, but the Negro River is closer to Manaus? Thank you!

  16. Trigonometry

    4. An observer is near a river and wants to calculate the distance across the river. He measures the angle between his observations of two points on the shore, one on his side and one on the other side, to be 28º. The distance between him and the point on

  17. geography

    The river which carries the most traffic in Europe and is the continent's most important inland waterway is the: Is it the Rhine river or the Danube River not sure. i think it is the Danube River am i correct?

  18. English 1

    In "A Cub Pilot" what does the author mean when he says the Mississippi is "fickle"? A- the river provides work for many pilots B- the river is only one of the many pilots that can work. C- the river often floods, endangering the people that live near it

  19. science

    THe headwaters of three river system are located in Colorado along the Great Continental Divide. identify the 3 system? are they: Colorado river Missouri river and Columbia river.

  20. trigonometry

    . A surveyor wishes to measure the distance across Pasig River. She sets up her transit at a point C on the bank of the river, and sights on a point B on the other bank directly opposite her. Then she turns the transit through a right angle, and measures

  21. Geometry

    A surveyor sights the far bank of a river at an angle of 110˚ to the near bank. She then moves 75 feet upriver and sights the same point on the far bank of the river at an angle of 150˚. What is the shortest distance across the river?

  22. Social Studies

    Please help I'm having a really hard time with these questions thank you The A) Chang River B) Huang River C) Yangtze River D) Xi River is especially important to China's early history. Winds from the Gobi Desert blow A) sand B) dikes C) oracle bones D)

  23. Geometry

    The distance between two docks on opposite sides of a river is 90 meters. The angle formed by the river bank and the line between the docks is 53°. What is the width of the river? Round your answer to the nearest meter and show your work.

  24. physics111

    a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the river is 800m wide. (A) what is his velocity(magnitude and direction)relative to the earth? (B)how much time is required to cross

  25. math

    A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from

  26. Physics help please

    A student swims at 4m/s. She is swimming from west to east across a river that's is flowing 2.2m/s [S]. A) if the river is 100 m wide, what is the quickest time that she can swim the entire width? B) how far downstream will she be? C) if she decides to go

  27. Grammar

    1. Which of the following sentences does NOT employ correct word usage? a. We had to travel several miles further into the Arkansas Ozarks to locate the Buffalo River. b. Because this river is only 130 miles long, many people are surprised that it has been

  28. ss

    1. To the north, Canada borders the (1 point) Atlantic Ocean. Pacific Ocean. Arctic Ocean. North Sea. 2. Volcanoes produced the Cascade Mountains of Washington and Oregon. What is the name of the peak that had a powerful eruption in 1980? (1 point) Mount

  29. Math

    A camper wants to know the width of a river. From point A, he walks downstream 100 feet to point B and sights a canoe across the river. It is determined that = 42°. About how wide is the river?

  30. geography

    a delta is a: a.wid river mouth where tides are experienced b.long narrow arm of the sea resulting from the submergence of a glaciated valley c.fan-shaped piece of land at the mouth of a river,resulting from deposition by the river d.funnel-shaped drowned

  31. pre-cal

    to find the distance AB across a river, a distance BC= 309m is laid off on one side of the river. It is found that B= 105.4 degrees and C= 12.2 degrees. Find AB To find the distance AB across a river, a distance BC= 309m is laid off on one side of the

  32. trig

    Points A and B are 150 m apart on one bank of a river. Point C is on the other bank of the river. The line of sight distance from A to C forms an angle and 28 degrees with the AB side of the river bank and the line of sight distance form B to C forms an

  33. Physics

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

  34. Maths

    A cliff on the bank of a river is 250m high if the angle of depression of the point of the opposite side of the river is 50 degree,find the width of the river

  35. math

    the Nile River is the longest river in the world that 4160 miles a group of explorers travel along the entire now in xx days they traveled the same distance each day write an algebraic expression to find out each day's distance

  36. Physics

    A boat travelling at 30km/h relative to water is headed away from the bank of a river and downstream. The river is 1/2 km wide and flows at 6km/h. The boat arrives at the opposite bank in 1.25min. Calculate the component of the boat's velocity directed

  37. Physics

    You wish to swim across a small river to your friend on the other side. The river is 30 m wide and you begin to swim straight across it at a speed of 1 m/s. The current in the river is 0.5 m/s and so the river carries you downriver as you swim. How far

  38. Geography

    Which river doesnt cross the Trans- siberian Railway route? - the Ob River - the Amur River - the Ural River - the Dniper River Thanx!!!

  39. Physics

    A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing

  40. physics

    At the bottom of river there is a lamp. On what minimal distance from the subject its reflection will be placed at the bottom of the river? Refraction index of water is 1.5, depth of the river is 2.5 m.

  41. Texas History

    The Atakapans occupied the region from the Sabine river to the? A. Sanjacinto River ~ B. Red River C. Colorado River D. Trinity River Both the Jumanos and Apache were well known for hunting? A. Wild Hogs B. Buffalo C. Deer D. Elk Unlike the Coahulitecans,

  42. English

    1.We had to travel several miles _____ into the Arkansas Ozarks to locate the Buffalo River. a. further b. farther A 2._____ this river is only 130 miles long, many people are surprised that it has been designated the first national river in the United

  43. Math

    A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from

  44. lwtech

    In order to build a bridge across a river, a surveyor is hired to find the distance across the river. The surveyor places a stake on either side of the river. As shown in the diagram below (the diagram is not drawn to scale). He measures the bearing to the

  45. Physics - URGENT

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

  46. Physics

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

  47. Physics

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

  48. Science

    Alex threw a stick in a river and watched as the river carried it away. He scooped a pail of water from the river and noticed that a leaf was floating in the pail without moving on the surface of the water. Why did the stick move in the river and the leaf

  49. math

    A cliff on the bank of a river is 300m high if angle of deprssion of a point on the oposite side of the river is 60 digree find the wigth of the river

  50. Maths

    A cliff on the bank of a river is 250m high if the angle of depression of the point of the opposite side of the river is 50 degree,find the width of the river

  51. physics

    a river flows due south with a speedof 2.0m/s.a man steers a motorboat across the river:his velocity relative to the river is 4.2m/s due east.the river is 800m wide.what is his velocity relative to the earth?

  52. Physics

    A river is flowing at 3mps.A man can swim in still water at a speed of 6mps.The angle at which the bank at which the swimmer should start ,so that he may cross the river along the shortest distance is?

  53. Mechanics M1

    A girl swims across a river. When she swims in still water, she swims at 1.25 m/s, the river flows parallel to its banks at v m/s. The girl aims to swim upstream at angle θ degree to the river bank so that her resultant velocity of 1 m/s is along AB,

  54. calculus HELP!

    A person stands on a bridge that is 100 feet above a river. If she drops a pebble how fast is it moving after 2 seconds? How long does it take the pebble to reach the river below? She has another pebble that she tosses up with initial speed of 8 feet per

  55. algebra

    if the red river is 500 miles longer than the blue river. if the sum of their lengths is 5550 miles what is the length of each river

  56. English

    1. He is in the river. [For example, half of his body is in the water. Or he is swimming in the river. He may be enjoying scub-diving in the river.] 2. He is on the river. [He is rowing a boat on the river. He is floating down on a log on the river. He may

  57. physics

    A 400.0-m-wide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing

  58. year 8 Geography

    In Geography i am learning about the River Tees.for my homework i need to do a project. The questions i need to answer are:- Q 1 ) How does the river tees effect the landscape on it`s journey from the source to the mouth? Q 2 )What process takes place in a

  59. physics

    A river flow of width 100 m is flowing with velocity of 1.5 m/s .A man start from one end with rest relative to river .He raws with an acceleration of 2 m/s^2 relative to the river if the man want to cross river in minimum time by how much distance will he

  60. language

    can you please correct my personifitcation poem? please? for any mistakes?? thank you! The Wild River The river breaths heavily It is fast and mean The river is strong And swallows all the leaves. The river is a stealer As it snatches the pebbles Then

  61. Math

    a man can swim with a speed of 4 km per hr in still water. How long does he take to cross a river 1 km wide if the river flows steadily at 3 km per hr and he makes his strokes normal to the river current? How far down the river does he go when he reaches

  62. physics

    The current of a river is 1.9 m/s. A person can swim 0.7 m/s. What is the best angle for the swimmer so that it is swept downstream the shortest distance possible? Distance of river is 120 m.

  63. physics

    River A & B flow into river C. River A is 40 ft wide and is flowing at an average of 2.47 mph. River B is 25 ft wide and has a flow rate of 1125 cubic feet per second. Assume all rivers have a uniform depth of 15 ft. If river C is 100 ft wide, what is its

  64. English

    1. He is in the river. [He is inside the river.] 2. He is sitting on the river. [He is sitting on the surface of the water.] 3. He is sitting in the river. [He is sitting on the bottom of the water.] 4. He is eating at the river. 5. He is eating at the

  65. Geography (Ms.Sue)

    Yesterday I asked this question- 29. One of Eastern Europe's most valuablee natural resouces, sometimes called its "lifeline" is the a. Volga river b. Danube river c. Rhine river d. Oder river I asked my teacher because I was stuck between A and B and she

  66. Math

    A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from

  67. physics - need help right now.

    A boat travels at 3.8 m/s and heads straight across a river 240m wide at an angle of 145'. The river flows at 1.6 m/s. a. What is the boat's resultant speed with respect to the river bank? b. How long does ti take the boat to cross the river? c. How far

  68. science

    Question 1: Candance is trying to explain that a dog is a living thing, but a river is not. What is one difference that will help her show this? a)a river cannot make another river b)both the dog and the river can move c)a river can be made by people, but

  69. Applied Physics

    An anchor holding a boat stationary on a river forms a 65 degree angle with the river bottom. The anchor line is 40 meters long. Assuming the river has a uniform depth, how deep is the river directly below the boat?

  70. Classical mechanics

    A boat leaves point P on one side of a river bank and travels with constant velocity V in a direction towars point Q on the other side of the river directly oposite P and distance D from it If r is the instantaneous distance from Q to the boat, θ is the

  71. math

    A man who can swim at 5km/h in still water swims towards the east to cross arriver. If the river flows from north to south at the rate of 3km/h a) Calculate: i) The resultant speed ii) The drift b) If the width of the river is 30m, find the time taken, in

  72. Math

    1 rabbit saw 6 elephants while going to the river. Every elephant saw 2 monkeys going towards the river. Every monkey holds 1 parrot in their hands. How many animals are going towards the river?

  73. mathematics

    a cliff on the bank of a river is 250mm.if the angle of elevation of a point on the opposite side of the river is 50;find the width of the river

  74. trig with enough info?

    Two oil Wells are 4 km and 6 km from the river. The points along the river are 8 km apart. Find the common loading point on the river, using the shortest amount of pipe.

  75. trig

    Two oil Wells are 4 km and 6 km from the river. The points along the river are 8 km apart. Find the common loading point on the river.

  76. geography

    natural banks which are sometimes built up by a river along the edges of its channel are called: a.river bluffs b.river cliffs c.levees d.slip-off slopes

  77. Science

    Name the largest rivr that flows through the Penfield, NY. WHERE DOES THAT RIVER ORIGINATE AND WHAT IS ITS BASE LEVEL? Is the river part of any of the river syetem shown in the map? if so which one?

  78. Math

    A cliff on the bank of a river is 250m high if d angle of depression of d point of d opposite side of the river is 50 degree,find the width of d river

  79. math

    It takes Ashley 8 hours to kayak 18 km up river and 18 km back down the river. if the river is flowing at 3 km/h, how fast did she puddle assuming she paddled at a constant speed?

  80. trig

    from an observer tower, a ff.above the level of a river,the angle of depression of a point on the near shore is theta and that of a point directly beyond on the far shore is FI. show that the width of the river is a (cotan theta=p+q/r)

  81. Physics

    A boat travelling at 30km/h relative to water is headed away from the bank of a river and downstream. The river is 1/2 km wide and flows at 6km/h. The boat arrives at the opposite bank in 1.25min. Calculate the component of the boat's velocity directed

  82. physics

    A motor boat heads east across a river at 5.1 m/s. The river flows south at 2.1 m/s. Calculate the resultant speed.

  83. Physics

    If a man is able to row at 5m/s in still water and he points his boat at a 50 degree angle from the shore in an upstream direction in a river that's flowing at 4 m/s how far, either up or downstream will be land on the other side of the river if the river

  84. Science

    1. To a scientist, a river is a kind of stream. True or False. 2. All streams carry sediment. T/F. 3. A delta keeps growing. T/F. 4. Heavy rain always cause flooding. T/F. 5. A river bank is at the end of a river. T/F.

  85. Grammar

    Which of the following sentences does NOT employ correct word usage? A. The rivers new status was publicized in a lot of newspapers and magazines. B. Soon the Buffalo River became more popular than many larger rivers. C. The differing amounts of rainfall

  86. Physics

    A man can still swim in water at speed 3km/h. He want to cross a river that flows at 2km/h and reach directly opposite to the starting point 1) find in which direction should he try to swim and find the angle of his body makes river fkowst 2) how much time

  87. physics

    Noah wants to swim across a river 10 m wide, flowing from north to south. He swims so his velocity with respect to the river is 2 m/s due east, and the river moves at 4 m/s. How far downstream in m from his starting point will he reach the other side?

  88. physics

    Noah wants to swim across a river 10 m wide, flowing from north to south. He swims so his velocity with respect to the river is 2 m/s due east, and the river moves at 4 m/s. How far downstream in m from his starting point will he reach the other side?

  89. English

    1. The ship is moving on the river. 2. The ship is moving in the river. [Which preposition do we have to use?] 3. He is floating down on a wide board on the river. 4. He is floating down on a wide board in the river. [Do we have to use 'on the river'

  90. History or English

    How did the river influence Twain's life? The river is the mississippi river...

  91. math calculus

    A person stands on a bridge that is 100 feet above a river. If she drops a pebble how fast is it moving after 2 seconds? How long does it take the pebble to reach the river below? She has another pebble that she tosses up with initial speed of 8 feet per

  92. physics

    Two rivers, A and B, flow together to form a larger river C. If the flux (volume rate of flow) of river A is 300 gallons per second and the flux of river B is 200 gallons per second, what is the flux of river C? 1)200g/s 2)250g/s 3)300g/s 4)500g/s

  93. math help!!

    A boat travels down the river in 2.9 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 30 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

  94. help math

    A boat travels down the river in 3.0 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 23 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

  95. help math!!!

    A boat travels down the river in 2.3 hours. The return trip up river takes 3.7 hours. A one way trip down or up river is a distance of 26 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

  96. physics

    A woman and her dog are out for a morning run to the river, which is located 3.51 km away. The woman runs at 3.48 m/s in a straight line. The dog is unleashed and runs back and forth at 5.50 m/s between his owner and the river, until she reaches the river.

  97. Physics

    Jeffrey wants to swim his girlfriend who is straight across from him, on the other side of a river bank. The river has a current velocity of 4km/h [W]. The width of the river is 300m. If it takes Jeffrey 15 minutes to reach her, a) how fast should the boy

  98. Earth science

    Can you please correct me if I am wrong or let me know what you think Thanks Y-A 1. Trees keep water in a watershed from accumulating silt before it empties into river. (i got true) 2. Permeable means capable of absorbing water. (i got false) 3. Old rivers

  99. math,trigonometry

    From a tower 36m high situated on one side of a river, the angle of desperation of the opposite side of the river is 25 degree. FInd the width of the river?

  100. World Geo Grade 7

    Whats one of the most famous fishing spots in the world? Colorado river Grand Banks Hawaii islands St Lawrence river or Mississippi river? St. Lawrence?

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