SciencePhysicsQ&A LibraryA surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the opposite bank, he walks x = 114 m along the riverbank to establish a baseline. Then he sights across to the tree. The angle from his baseline to the tree is θ = 36.8°. How wide is the river? y= ? An overhead view of a straight, horizontal river, with a tree on the upper-left bank. A point is marked on the lower right bank. The horizontal distance to the tree from the point is labeled x, and the vertical distance from the tree across to the opposite bank is labeled y. The angle between the horizontal lower bank and a line segment connecting the point and the tree is labeled θ.

Question

A surveyor measures the distance across a straight river by the following method: Starting directly across from a tree on the opposite bank, he walks *x* = 114 m along the riverbank to establish a baseline. Then he sights across to the tree. The angle from his baseline to the tree is θ = 36.8°. How wide is the river? y= ?

An overhead view of a straight, horizontal river, with a tree on the upper-left bank. A point is marked on the lower right bank. The horizontal distance to the tree from the point is labeled *x*, and the vertical distance from the tree across to the opposite bank is labeled *y*. The angle between the horizontal lower bank and a line segment connecting the point and the tree is labeled θ.

Tagged in

Science

Physics

Find answers to questions asked by students like you.

Q: A freight train has a mass of 1.1 ✕ 107 kg. If the locomotive can exert a constant pull of 7.4 ✕ 105...

A: Given information:Mass of the train (m) = 1.1 × 107 KgForce the locomotive can exert (F) = 7.4 × 105...

Q: I am having trouble with this question and would appreciate some help. Thanks.

A: Part (a): Ratio of the momentum:

Q: You are spinning a 20kg mass horizontally attached to a spring. The relaxed length of thespring is ....

A: Click to see the answer

Q: у (m) 31. A 4.00-kg particle moves QIC from the origin to position T ©, having coordinates x = 5.00 ...

A: Part A:

Q: (Multiple choice) An electron volt is (explain why that answer is correct): a. the force required to...

A: Joule is the SI unit of energy. However, joule is a large unit for measurements corresponding to ele...

Q: TOnsa What is the power output of the 20 0 resistor if the potential difference between points a and...

A: Let V be the potential difference across point a and b, Req be the equivalent resistance across it, ...

Q: A pair of forces with equal magnitudes, opposite directions, and different line of action is called ...

A: The net torque will be zero under the equilibrium condition

Q: Part b

A: Part B: The energy of the system is conserved as there isn’t any dissipative force acting on it.Assu...

Q: Hi, I am trying to solve a problem for physics I. They show the angular displacement between t = 5 s...

A: From the graph, the corresponding angular displacement at t=5s is 50 rad and t=15s is 62.5rad. There...

Q: What is the velocity of water given the following?

A: Given:Diameter of pipe = 0.4 mDynamic viscosity of water = 0.01 kg m/sDensity of water = 997 kg/m3Re...

Q: Junior throws his mashed potatoes onto his mother's lazy susan, which has a moment of inertia I. If ...

A: The initial angular momentum of potatoes = mvd,where, m is the mass of the potato, v is the horizont...

Q: Find the tension in the two cords shown in the figure. Neglect the mass of the cords, and assume tha...

A: Click to see the answer

Q: A bag of sugar weighs 1.50 lb on Earth. What would it weigh in newtons on the Moon, where the free-f...

A: Let the mass of the sugar bag be denoted by m.Let the weight of the sugar bag on the earth be denote...

Q: What are fermions and what's the difference between it and bosons?

A: The description of elementary particles in particle physics is based o their mass, charge, interacti...

Q: 4. A charged metal sphere of radius a is surrounded by a conductor of inner radius b. The center sph...

A: (a)From Gauss law, the expression of the electric field between the cavity of the sphere is:

Q: On the planet Gizmo, the inhabitants travel by high speed trains that run on air tracks much like th...

A: Given information:

Q: (Multiple choice) If a spherical copper conductor with a charge of -Q is connected to another stainl...

A: The charge on the copper conductor will be +Q

Q: - A boat moves through the water with two forces acting on it. One is a 1,875-N forward push by the ...

A: Consider two opposite forces are acting on the boat given by Fforward and Fresistive and their magn...

Q: I need help on that

A: Given values:F = 200 Nm = 30.0 kgthe coefficient of kinetic friction between the crate and the surfa...

Q: A planet similar to the Earth has a radius 4.3 × 106 m and has an acceleration of gravity of 10 m/s ...

A: Click to see the answer

Q: An object of a material A of density 10.6 g/cm3 is placed in a tub of mercury (density 13.6 g/cm3). ...

A: Given,

Q: Explain how the condition (sum)F = 0 is satisfied for the meter stick in case 1 of the experiment. C...

A: Given information:Mass of the block (m1) = 100 g = 0.1 kgMass of the block (m2) = 200 g = 0.2 kgLet ...

Q: I need help with part D!!

A: The increase in gravitational potential energy of block will be,

Q: The crew on peg leg Petes' ship have mutinied. Now Pete finds himself walking the plank. The plank i...

A: Write an expression for moment about the pivot

Q: A Helmholtz resonator is observed to oscillate at 400 Hz when someone blows across the top of it. If...

A: The formula for the frequency of Resonance is:

Q: A train locomotive pulls a train with a mass of 1.00 ✕ 107 kg on level rails. The locomotive exerts ...

A: According to the Newton’s second law, the acceleration of the train,Substitute the values,

Q: A force of 25.0 N is applied in the positive x-direction to a block of mass 9.25 kg, at rest on a fr...

A: Given,

Q: Could you kindly solve this and let me know the answer?

A: The expression of the resultant vector is,

Q: Problem-2 A spring is hanging from the ceiling at its equilibrium. A mass of 275g is added to the sp...

A: (a) For a simple harmonic motion,

Q: What capacitance, in μF, has its potential difference increasing at 9.0×105 V/s when the displacemen...

A: Given,

Q: What energy transformations are involved when a dragster engine is revved, its clutch let out rapidl...

A: When a dragster engine is revved first in the internal combustion engine the chemical energy of the ...

Q: In introductory physics laboratories, a typicalCavendish balance for measuring the gravitational con...

A: Given that, the masses of lead spheres are 1.68 kg and 14.4 g, and whose centers are separated by a ...

Q: A thin rod has a length of 0.106 m and rotates in a circle on a frictionless tabletop. The axis is p...

A: the final moment of inertia of the system is

Q: **38. A quarterback fires off a pass with the football traveling at a speed of 20 m/s and with a rot...

A: Consider the mass of the football be m, the translational speed of the football be v, the rotational...

Q: As a protest against the umpire's calls, a baseball pitcher throws a ball straight up into the air a...

A: the work done is equal to the kinetic energy gained by the ball,

Q: Number 2. I need also the free body diagram for that question.

A: Coefficient of the static friction,The acceleration due to gravity,Radius of the curve road,

Q: boka Flight: Best Course Home whitworth Librene Pirate Port JPublic eal in https://openvellum.ecolle...

A: Part AThe string be stretched by the distance x, it is shown in the below figure.

Q: X Book a Flight: Best Join conversation Course Home X A-Z Databases whitworth Library Pirate Port | ...

A: Consider that the force applied by the person is “F” which causes tension in the string. The situati...

Q: A solid sphere is roling on a surface. What fraction of its total kinetic energy is in the form of r...

A: Click to see the answer

Q: One type of gas mixture used in anesthesiology is a 50%/50% mixture (by volume) of nitrous oxide (N2...

A: Consider the gas’s initial temperature be T1, the gas’s initial pressure be P1, the gas’s final temp...

Q: A 4.4-kg block is pushed 3.5 m up a vertical wall with constant speed by a constant force of magnitu...

A: Given information:Mass of the block (m) = 4.4 kgCoefficient of friction between the block and the wa...

Q: . What is the gravitational force of attraction between two electrons held onemeter apart in a vacuu...

A: The magnitude of the gravitational force between two bodies of masses m1 and m2 at a distance r apar...

Q: Could you kindly solve and explain this to me? Thank you, Faizan Alam

A: Click to see the answer

Q: You pull on a string with a horizontal force of magnitude Fyb = 44 N that is attached to a block of ...

A: Write an expression for conservation of energy

Q: a)draw free body diagram for both m1 and m2 b)what is the acceleration of the blocks?

A: Given,

Q: The planet Earth orbits around the Sun and also spins around its own axis. Calculate the angular mom...

A: The mass of earth is 5.972x1024kg, velocity of Earth is 3x104m/s, and the radius of orbit is 1.5x101...

Q: An 84 kg skier glides down a hill. The coefficient of kinetic friction μk = 0.15. The angle of inc...

A: Given:

Q: (Mulitple choice) If we move a negatively charged particle through an electric field, in which situa...

A: No change in electric potential occurs when we move the particle perpendicularly to the direction of...

Q: a. What is the electric field strength at the position of the electron in (Figure 1)? Assume that B ...

A: Given:

Q: A fixed 19.7-cm-diameter wire coil is perpendicular to a magnetic field 0.57 T pointing up. In 0.25 ...

A: Consider the change in magnetic field be dB, the time interval be dt, the diameter of the wire coil ...