Answer:
Contraction of Chicago concrete walkway = 8.64 x 10⁻³ m
Explanation:
Thermal expansion or compression is given by ΔL = LαΔT
Here Length of Chicago concrete walkway, L = 18 m
Change in temperature, ΔT = (-16 - 24) = -40 °C
Coefficient of thermal expansion for concrete, α = 12 x 10⁻⁶ °C⁻¹
Substituting
ΔL = LαΔT = 18 x 12 x 10⁻⁶ x (-40) = -8.64 x 10⁻³ m
Contraction of Chicago concrete walkway = 8.64 x 10⁻³ m
Answer:
In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize.
Answer: A
Explanation: Any short-duration exercise that is powered primarily by metabolic pathways that do not use oxygen. Examples
of anaerobic exercise include sprinting and weight lifting.
Answer: 100 N
Explanation:
F = ma = 0.5(200) = 100 N
Answer:
2.15 m
Explanation:
u = 2.2 m/s, v = 0, uk = 0.115
a = uk x g = 0.115 x 9.8 = 1.127 m/s^2
Let s be the distance traveled before stopping.
v^2 = u^2 - 2 a s
0 = 2.2^2 - 2 x 1.127 x s
s = 2.15 m