Answer:
Nails rusting over time as they are exposed to oxygen
Explanation:
New substance with new property is formed
It have also changed the chemical property of the substance
It is difficult to reverse the change etc...
The answer is a steep mountainside
Answer:
The internal resistance of the cell is, r = 2.27 Ω
Explanation:
Given data,
The voltage of the battery, v = 1.49 V
The external resistor of resistance, R = 3.2 Ω
The current through the circuit after connecting resistor, I = 0.27 A
The theoretical value of current through the circuit,
Iₓ = v / R
= 1.49 / 3.2
= 0.4585 A
But, the actual reading of the current through the circuit is,
I = 0.27 A
Therefore, the total resistance Rₓ = v / I
= 1.49 / 0.27
= 5.52 Ω
Therefore, the internal resistance of the cell,
r = Rₓ - R
= 5.52 Ω - 3.2 Ω
∴ r = 2.27 Ω
The kinetic energy at the top of the rock trajectory is 43.57 Joules
The kinetic energy formula and the procedure we will use is:
K.E. = 1/2 m (v*cosθ)²
Where:
- v = speed
- m = mass
- θ = angle
- Joules = Kg m²*s²
Information of the problem:
- v = 32 m/s
- m = 0.145 Kg
- θ = 40°
Applying kinetic energy formula we get:
K.E. = 1/2 m (v*cosθ)²
K.E. = 1/2 * 0.145 kg (32 m/s*cos40°)²
K.E. = 1/2 * 0.145 kg *(24.513 m/s)²
K.E. = 1/2 * 0.145 kg *600.91 m²/s²
K.E. = 87.132 kg m²/s² / 2
K.E. = 43.57 Joules
<h3>What is kinetic energy?</h3>
It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).
Learn more about kinetic energy at brainly.com/question/114210
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