Abird flying horizontally accidently drops a rock it was carrying. 2.10s later, the rocks velocity is 22.2m/s in a -68.2 direction. what was the birds (and rocks) initial velocity

8.24 m/s

Explanation:

Given:

t = 2.10 s

v₀ᵧ = 0 m/s

vₓ = 22.2 cos(-68.2) m/s

aₓ = 0 m/s²

Find: v₀

In the x direction:

v = at + v₀

22.2 cos(-68.2) = (0) (2.10) + v₀ₓ

v₀ₓ = 8.24

v₀² = v₀ₓ² + v₀ᵧ²

v₀² = (8.24)² + (0)²

v₀ = 8.24 m/s

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.