Answer:
The transnational kinetic energy of the yo-yo is 0.083 J.
Explanation:
Given that,
Force=0.24 N
Distance in up= 0.17 m
Distance in down = 0.26 m
Mass of yo-yo = 0.057 kg
Initial speed = 2.4 m/s
Suppose we find the increase in the transnational kinetic energy of the yo-yo
The transnational kinetic energy is equal to the change in potential energy.
We need to calculate the transnational kinetic energy of the yo-yo
Using conservation of energy
Where, F = force
h = height
m = mass of yo-yo
Put the value into the formula
Hence, The transnational kinetic energy of the yo-yo is 0.083 J.
7264 Joule
Use the formula K=0.5*mass*velocity^2
Answer:
3- kinetic energy was transferred from the water to the ice
Explanation:
the kinetic energy in this situation is the molecules vibrating so the molecules in the ice absorb it and make the molecules not vibrate so it gets colder
Answer:
The new intensity = 3.38 × 10⁻⁵ W/m²
Explanation:
Intensity of sound wave:
The intensity of sound is the rate of flow of flow of energy, per unit area, perpendicular to the direction of the sound wave.
Intensity (I) ∝ A²
where I = intensity, A = Amplitude.
∴ I₁/I₂ = A₁²/A²₂............................... equation 1
From the question, the amplitude increase by 30% of the initial
∴ A₂ = A₁ + 0.3A₁ = 1.3A₁, I₁ = 2.00×10⁻⁵ W/m²
∴ (2.00×10⁻⁵)/I₂ = A₁²/(1.3A₁)²
(2.00×10⁻⁵)/I₂ = 1/1.3²
making I₂ the subject of the equation
I₂ = (2.00 × 10⁻⁵)×1.3² = 3.38 × 10⁻⁵ W/m₂
The new intensity = 3.38 × 10⁻⁵ W/m²
