The answer should be D) Cold air because even though its true sound can travel through all types of matter, air which is a gas, can travel but it travels SLOWLY while sound travels quickly in SOLIDS.
Answer:
B
Explanation:
Because it has to increase
The book's vertical position in the air is
where 
. It reaches the ground when 
, at a time 
such that
So it takes the book 4 seconds to reach the bottom. The given initial velocity is irrelevant since it only has a horizontal component; vertically, the book is starting from rest.
Answer: the sphere's inner radius is 4.21 cm so the Inner diameter is 8.42 cm
Explanation:
Given that;
mass m = 746 g
diameter d = 10.4 cm
radius r = 5.2 cm
density of aluminum = 2.7 g/cm³
we know that
density × volume = mass
P × 4/3π( r₀³ - ri³) = m
so we substitute
2.7 × 4/3π( 5.2³ - ri³) = 746
11.3097( 5.2³ - ri³) = 746
( 5.2³ - ri³) = 746/11.3097
140.608 - ri³ = 65.961
ri³ = 140.608 - 65.961
ri³ = 74.647
ri = ∛74.647
ri = 4.21 cm
the sphere's inner radius is 4.21 cm so the Inner diameter is 8.42 cm
Answer:
F = 2.1 10³ N
Explanation:
Young's modulus is defined as the tensile strength (pressure) between the unit strain, whose equation is as follows:
Y = P / (ΔL / L)
Body pressure is defined as the relationship between force and area over which it is applied.
P = F / A
Let's replace and clear the force
Y = (F / A) / (DL / L
Y ΔL / L = F / A
F = Y A ΔL / L
Let's calculate the area
. The tendon is shaped like a cylinder, so the area is the circle
A = π R²
R = d / 2 = 5.90 10⁻³ / 2
R = 2.95 10⁻³ m
A = π (2.95 10-3)²
A = 2,734 10⁻⁵ m²
Let's calculate deformation
ΔL = 0.149 -0.14
ΔL = 0.009 m = 9 10⁻³ m
Let's replace and calculate
F = 1.20 10⁹ 2,734 10⁻⁵ 9 10⁻³ / 0.14
F = 2.1 10³ N
