Answer:
T = 292.4 N
Explanation:
For this exercise we must use the translational equilibrium condition
∑ F = 0
Since force is a vector magnitude, the easiest way
Since the angle between the two forces is 140, the angle from the vertical is half tea = 70
cos θ = T_y / T
sin θ = Tₓ / T
T_y = T cos 70
Tₓ = T sin 70
X axis
Tₓ₁-Tₓ₂ = 0
Tₓ₁ = Tₓ₂
Y axis
T_y + T_y - W = 0
2 T cos 70 = W
T =
let's calculate
T = 200/2 cos 70
T = 292.4 N
Answer:
Machines reduce the time of work hence reducing the rate of doing work ( power ).
Machines e.g pulleys carry heavy loads with a less and reasonable effort.
Machines e.g generators induce current in a limited amount of time
Answer:
The beauty of science is everywhere.
Explanation:
science is extremely important and you see it all around you. For instance you need knowledge of chemistry to create medication in order to help cure the sick. Knowledge of physics is needed in order to construct building or vehicles.
make sure to ask if you need anymore examples or proof :)
Answer:
Visible light
Explanation:
Electromagnetic spectrum is the classification of the electromagnetic waves according to their frequency/wavelength. In order from the shortest to the longest wavelength, we have
Gamma rays
X-rays
Ultraviolet
Visible light
Infrared
Microwaves
Radio waves
All these waves are invisible to human eye, except for the part referred as 'visible light'. The electromagnetic waves of this part of the spectrum are visible to human eye, and they appear as a different color depending on their wavelength. In particular, we have:
Violet: 380-450 nm
Blue: 450-495 nm
Green: 495-570 nm
Yellow: 570-590 nm
Orange: 590-620 nm
Red: 620-750 nm