Physics Regents Review – Flashcards
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When using the equation Ephoton= hf = hc/wavelength, Ephoton must be in
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Joules
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is equal to 2.2 pounds
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1 Kg
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weighs about 5 grams
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A nickel
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the change in position of an object
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Displacement
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the vector sum of two or more vectors (a^2 + b^2 = c^2
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Resultant Vector
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equal to the mass of an object
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Inertia
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measured in watts
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Power
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measured in Joules
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Energy
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is equal to power (ohm's law) x time
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Energy in a Circuit
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holds together particles of the nucleus
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Strong Force
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decreases as you move away from the earth by distance squared
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Weight (Force of Gravity)
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means the net force is zero and the acceleration is zero
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Constant Velocity or Zero Velocity
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Velocity displacement, momentum and force are
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Vectors
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Speed, distance, time, and energy are
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Scalar Quantities
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is the slope of a velocity-time graph
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Acceleration
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is the slope of a distance-time graph
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Velocity
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is conserved in all collision systems
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Momentum
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how large a vector quantity is
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Magnitude
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is the sum of the potential and kinetic energy
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Mechanical Energy
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is an energy unit equal to 1.6 x 10^-19 Joules
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An eV
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increases as height increases
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Gravitational Potential Energy
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changes only if velocity changes
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Kinetic energy
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is a charge
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Coulomb
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is current (coulomb/sec)
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Amp
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is potential difference (joule/coulomb)
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Volt
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short, fat, cold wires
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Best conductor
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have equal amounts of charge (1.6 x 10^-19)
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Electron and Protons
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decreases the total resistance of a circuit
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Adding a resistor in parallel
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increases the total resistance of a circuit
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Adding a resistor in series
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have equal current (I)
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All resistors in series
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have equal voltage (V)
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All resistors in parallel
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add the charges and divide by 2 to find the final charge on each sphere
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If two charged spheres touch
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point in the direction of the force on a positive test charge
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Electric Fields
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are uniform in strength except at the edges
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Electric fields between parallel plates
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is defined by the direction a compass needle points
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Direction of a magnetic field
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are longitudinal and mechanical
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Sound waves
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are measured to the normal
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All angles
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are transverse
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Light waves
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a wave will be refracted 90 degrees
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At the critical angle
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a wave source moving toward you will generate waves with a shorter wavelength and higher frequency
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Doppler Effect
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vibrate back and forth perpendicular to the wave direction
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Transverse waves particles
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is a particle of light
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Photon
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originate from accelerating charged particles
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Electromagnetic waves
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is the lowest energy state of an atom
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Ground State
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is the sum of the temperature (KE) and phase (PE) conditions
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Internal Energy
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are strong and short ranged
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Nuclear Forces
