Answer:
3 m/s²
Explanation:.
To solve this, we use the formula of tangential acceleration. The tangential acceleration is given by the following equation:
a(t) = r * a(a)
where
a(t) is the tangential acceleration, m/s²
r is the radius, m
a(a) is the angular acceleration, rad/s²
Again, we know that the radius can be gotten by saying r = d/2, thus, r = 1.2/2 = 0.6 m
We then multiply this by the angular acceleration, to get our tangential acceleration
a(t) = 0.6 * 5 = 3 m/s²
Therefore, the Tangential acceleration of a point on the flywheel rim has been found to be 3 m/s²
Answer:
Correct option is
B
16dB
Sound level at A is ⊥o⊥B
If the intensity of sound at A 4 cm away from the source is I
A
then.
⊥o=10log
I
o
I
A
Where I
o
=10
−12
w m
−2
⇒⊥=log
10
−12
I
A
⇒
10
−12
I
A
=10
⇒I
A
=10
−11
wm
−2
If the source (s) is emmitting the sound energy of power P
I
A
=
4×(4)
2
P
⇒P=10
−11
×64π w
⇒ Intensity of sound (I
B
) ar point B,2 m
I
B
=
4π(2)
2
P
I
B
=
16π
64π×10
−11
10 m
−2
⇒I
B
=4×10
−11
wm
−2
⇒ Sound level at 2m=10log(
I
I
B )
=10log(10 −12
4×10 −11)
=10log40
=16.02
Hence Sound level at 2m from sourceis 16 dB
<span>So we want to know how much work does Brianna do while climbing the stairs to a height h=8m while she weighs F=425N and in t=6s. So work W is defined as Force F times distance h or: W=F*h. Since Brianna has to use the force that is equal to her own weight during her climbing the calculation is this: W=F*h=425N * 8m=3400J. The work she does is W=3400 J.</span>
Answer:
They gain kinetic energy
Explanation:
When the temperature of the particles in a substance rise, its internal energy increases. This internal energy is thus translated to kinetic energy of the particles in the substance. If the substance is a solid, as the kinetic energy increases, the vibrations of the particles of the substance increases causing it to undergo a change of state to liquid when the temperature reaches its melting point.
This change of state also occurs from the liquid state to the gaseous state as the internal energy of the substance, and thus the kinetic energy of the particles increase when the temperature reaches the substance's boiling point.
<u>So, as the temperature of a substance rises, the particles of the substance gain kinetic energy.</u>
