Answer:
x = 625 m
Explanation:
To solve this exercise we use the kinematics relations
v² = v₀² - 2 a x
indicate that the train stops therefore its final speed is zero (v = 0)
0 = v₀² - 2a x
x =
let's slow down to the SI system
v₀ = 90 km / h (1000 m / 1km) (1h / 3600 s) = 25 m / s
let's calculate
x =
x = 625 m
In air, you'd call it air resistance, pilots call it drag. In water, some call it
water resistance, or just plain drag.
Whatever it's called, it's the friction between the object and the fluid, plus
the force needed to push the fluid out of the way to let the object get through.
Answer:
No de español muy bien por favor pregúntalo en inglés
Explanation:
Answer:
C. 1.5 W/m²
Explanation:
= Unpolarized light = 4 W/m²
= Angle with which the polarizer is turned
The polarization of light is given by
The intensity of light after passing through the first polarizer is 1.5 W/m²