The "pitch" of a sound is the impression your brain forms
that corresponds to the frequency of the sound wave.
When the frequency is high, your brain says "high pitch".
When the frequency is low, your brain says "low pitch".
Answer:
(a) upper : 3.18 m, lower: 2.58
(b) upper : 3180 mm, lower: 2580 mm
(c) upper : 2.81 m³, lower: 1.5 m³
Explanation:
given information:
the distance ranged from 43 to 53 cm
length of cylindrical pillar = 6 cubits
diameter = 1 cubit
(a) the cylinder's length in meters
upper = 53 cm x 6 cubits
= 318 cm
= 3.18 m
lower = 43 cm x 6 cubits
= 258 cm
= 2.58 m
(b) the cylinder's length in millimeters
upper = 3.18 m
= 3180 mm
lower = 2.58 m
= 2580 mm
(c) the cylinder's volume in cubic meters
upper : V = πr²l
= π (0.53m)² (3.18)
= 2.81 m³
lower : V = πr²l
= π (0.43m)² (2.58)
= 1.5 m³
Answer:
The answer is 312.5j
Explanation:
The kinetic energy (KE):
KE=1/2*m*v^2
M= mass of the object
v= velocity of the object
We have;
m=25g
v=5m/s
KE=1/2*25g*5^2m/s
KE =312.5j
Answer:
a. Chemical formula
Explanation:
A notation that shows which elements, and how many of each type a compound contains is a chemical formula.
Basically, a chemical formula helps scientists to show or illustrate the type and number of atoms present in a particular molecule or compound by using numerical subscript, ions and atomic symbol of a chemical element.
This ultimately implies that, a chemical formula is used to describe or denote the exact amount of atoms that make up a molecule or compound.
<em>Some examples of a chemical formula are;</em>
Water =
Sodium Hydroxide =
Hydrochloric acid =
Carbon II oxide =
Answer:
the answers, the correct one is A v= 22.5 m/s
Explanation:
We can solve this problem using the concepts of conservation of mechanical energy
Starting point. Lowest point of the trajectory
Em₀ = K = ½ m v₀²
Final point. When it is at a height of y = 20 m
= K + U = ½ m v² + mg y
how energy is conserved
Emo = Emf
½ m v₀² = ½ m v² + m g y
v² = v₀² + 2 g y
let's calculate
v²2 = 30 2 + 2 9.8 20
v² = 508
v²= ra 508
v² = 22.54 m / s
When checking the answers, the correct one is A