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A girl 1.2 m in height is 25m away from a tower 18m high What value is the angle of elevation of the top of the tower from her eyes?
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∙ 9y ago
A girl 1.2 m in height is 25 m away from a tower 18 m high. What value is the angle of elevation of the top of the tower from her eyes?
marie humes
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The value of sin A is 5.82 and the actual angle is 19.47 degees
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90
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When surveying using a "level" instrument , the "level" instrument is set-up and adjusted to level by adjusting the screws. When surveying you have an instrument person and a rod person. When trying to find the height of the instrument, the rod person places there rod over a "known" elevation, either a benchmark or a temporary benchmark that has a known elevation. To get the height of the instrument, you need to "shoot" the level to the rod person holding the rod on the known elevation, this is called the "Backsight". This elevation will be read by the instrument person, and recorded in the survey field book. This value backsight elevation will then be added to the known elevation of the benchmark or the temporary benchmark, to get the height of instrument. HI = known elevation + BS Height
If a ship is going southwest at 42 degrees and is as close as it can get to a lighthouse and the angle of elevation from the ship to the lighthouse is 18 degrees what's the height of the lighthouse?
Actually, the question is unanswerable. You need to at least know the height of one object - either the ship, or the cliff height, or the distance between the cliff to the water, and the cliff to the boat. I don't know if it can be answered, it doesn't give enough information one would have to have one distance value or speed value. I think at least.
How tall is a boy that casts a 4 ft shadow?
The height of a boy that casts a 4 foot long shadow depends on the angle of the sun. A tangent can be used to calculate his height if we know the angle of the sun using the equation: Height = shadow length x tangent of the angle of the sun. Using a calculator, it is easy to get the value of the tangent for any angle and then complete the equation.
What is the Effect of changing the angle of projection on the magnitude of maximum height?
Max height H = u2 sin2@ / 2g So as we increase the angle of projection, then max height too increases and its value will be just u2/2g when it is projected vertically upwards ie @ = 90 deg
I have no idea how to go about this question on my geometry homework! Can someone help me?
The two triangles shown are similar triangles. Numerically, the ratio computed by dividing the length of any side of tower triangle by the length of the corresponding side of the walking stick (similar) triangle will be the same value. Therefore, when the length of the tower shadow is divided by the length of the walking stick shadow, that ratio will be the exactly same as the tower height divided by the walking stick height. (length of tower shadow)/(length of walking stick shadow) = (tower's height)/(walking stick height) tower's height = {(length of tower shadow)/(length of walking stick shadow)}*(walking stick height)
A tree which is 93 ft tall casts a shadow of 26 ft find the angle of elevation of the sun?
Use the tangent formula: tanx= opposite side {divided by} adjacent side 1) Divide the 2 sides I side. 2) See the "tanx"? Tan is a value. And x is a variable. To get x, the angle we are looking for, we must take the answer from 1) and go tan-1 on it (some calculators you hit tan, then 2nd function, others are the opposite). 3)You should have the value of x, the angle of elevation to the sun.
What is the tangent of an angle a?
Angle a, by itself has no value. You must first assign a value to a to get the value of tan a.
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Get the value of initial velocity. Get the angle of projection. Break initial velocity into components along x and y axis. Apply the equation of motion .
What is the value of the hypothenuse of a triangle that has a base of 6 ft and a height of 5 ft?
If it's a right angle triangle then use Pythagoras' theorem to find the hypotenuse. If it's not then more information is needed such as an interior angle.
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It depends on the mass of the object, the local value of acceleration of gravity, and the object's height above the elevation you're using for your zero-potential-energy reference level.
What factors does the gravitational energy of an object depend on?
It depends on the mass of the object, the local value of acceleration of gravity, and the object's height above the elevation you're using for your zero-potential-energy reference level.
What does the gravitational potential energy of an object depend on?
It depends on the mass of the object, the local value of acceleration of gravity, and the object's height above the elevation you're using for your zero-potential-energy reference level.
