Electrical Relationships and Energy Formulas

This page delves deeper into electrical relationships and kinetic energy calculations, concluding with important unit reminders.

Definition: Kinetic energy (Ec) represents the energy possessed by an object due to its motion, calculated using Ec = ½ × m × v²

Vocabulary:

• Tension (U): Voltage measured in volts (V)
• Résistance (R): Electrical resistance measured in ohms (Ω)
• Intensité (I): Current measured in amperes (A)

Example: Ohm's law demonstrates the relationship between voltage, current, and resistance through U = R × I

Highlight: The document concludes with essential unit reminders:

• Newton per kilogram (N/kg) for gravitational field strength
• Joule (J) for energy
• Watt (W) for power
• Volt (V) for electrical potential difference
• Ampere (A) for current
• Ohm (Ω) for resistance

Physical Quantities and Basic Formulas

This page introduces fundamental physical quantities and their mathematical relationships in physics and chemistry. The content focuses on density, weight, energy, and electrical concepts.

Definition: Density (masse volumique) is defined as mass per unit volume, expressed in kg/m³.

Vocabulary:

• Masse $m$: Mass measured in kilograms (kg)
• Volume (V): Space occupied measured in cubic meters (m³)
• Vitesse $v$: Velocity measured in meters per second (m/s)

Example: Weight calculation using P = m × g, where g is gravitational field strength (N/kg)

Highlight: Power (P) can be calculated in two ways: through energy over time $P = E/t$ or through electrical quantities $P = U × I$