Question
From the top of a building, the angle of depression to a
point on the ground is 45 degrees. If the building is 50 meters high, how far is the point from the base of the building?Solution
Let the distance from the base of the building to the point be d meters. Using the angle of depression, we have: tan(45°) = height of the building / d 1 = 50 / d d = 50 meters Thus, the distance from the base of the building to the point is 50 meters.
The time period of a second’s pendulum is –
Which lens is used to correct myopia (shortsightedness)? Â
Which phenomenon does a hologram use to create an image?
Which of the following vitamins are called fat-soluble vitamins?
What is the speed of sound in air at room temperature (20°C)? Â
The force of attraction between two masses is called — Â
The experimental evidence that the electron exhibits wave-like characteristics was first provided by:
A body explodes into three equal fragments, two of which fly off perpendicular to each other with equal speeds. What is the direction of the third frag...
The Pointing vector of electromagnetic waves has the same dimensions as that of:
When a cannonball is fired, its motion is an example of ______.
