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# Phyx eqns Misc

Question | Answer |
---|---|

Acceleration Due to Gravity in terms of Newton's Law of Gravity | g = GM/ r^2 |

Gravitational PE in terms of Newton's Law of Gravity (when h is near or bigger than the radius of a planet) | PE= GMm/r |

Velocity for something rotating around the earth | v = √ (GM/r) |

Magnetic Force is always _____ to velocity | perpendicular |

Work in terms of Energy | W = ΔKE or W = ΔPE |

A magnetic force can only change the ______ of a particle, not its ________ | Direction speed |

Increasing the intensity of light will increase what? | the number of photons, not the energy of the individual photons |

Density of Water | 1000 kg/m^3 |

Momentum of a particle using Energy | p= √(2 m KE) |

Wavelength of a particle using KE | λ = h/ √(2 m KE) |

Electrical Power (2nd) | P = I^2 R |

Alpha Particle | A helium particle that is released from a nucleus 4 2 He |

Beta Particle | Released when a neutron becomes a proton and the nucleus emits an electron (beta particle) |

Gamma Particle | a high energy photon released from a nucleus |

Conversion of Celsius to Kelvin | C + 273 = K |

What determines the radius of a rotating charge in a magnetic field? | The ratio of mass to charge |

If a heat process is cyclic the change in Internal Energy is _____ | U = 0 |

Lenz Law is a what kind of law? | A conservation of energy law |

Can an E field exist inside a conductor? | No |

If the si is positive it means_____ | the image is real and on the other side of the lens |

if si is negative it means______ | the image is virtual and on the same side of the lens |

For magnification a positive number means____ | the image is upright |

For magnification a negative number means____ | the image is inverted |

A real object is always | positive |

Isothermal | Temp stays constant |

Isobaric | Pressure stays constant |

Isochoric | Volume stays constant |

Adiabatic | No heat flows in or out (looks like an isothermal process the final states have higher or lower temp) |

Work done in a PV diagram | Area under the curve |

Temp in a PV diagram | T = PV |