# Physics Overview

 Percent difference (measured value-expected value) x 100expected value Atomic Number is the number of Protons If a nucleus emits a beta particle then the atomic # ____ and the mass ____. changes and stays the same Solenoid equation μ0nI where n is the number of turns per length and the I is current When power goes up what happens to the resistance? it goes down What happens to the current when the voltage is doubled? It is doubled what 2 things does the magnetic field in a solenoid depend on? diameter of the solenoid and direction of the current the strength of magnetic field in a solenoid depends on what two things? current and coil number in a series circuit the current... stays the same milli- 10-3 Kilo- 103 period 1/frequency what does ultrasonic imaging use? doplar effect and beats sound level is measured in decibels sound intensity is measured in watts/meter2 sound level equation 10dB log (intensity/I0) frequency is beats/second work is force x distance power is work over time gravitational potential energy mass x gravity x height if kinetic energy is doubled what happens to the work and the force? the work and the force also double kinetic energy varies as velocity2 volume is mass/density pressure is force over area density mass/volume velocity is acceleration x time how does gravitational force vary? by distance2 electric field is the difference of voltage/ spacing decreasing distance by 2 does what to intensity? it increases it by as a f factor of 4 Energy Stored 1/2 current x voltage2 voltage is current x resistance a watt is volts x ampsjoules/seconds disipating power I2Rwhere I is current and R is resistance volts are amps x ohms a joule is newton x meter free fall equation for how far 1/2 gravity x time2 distance travelled equation (from rest) 1/2 acceleration x time2 AuthorAnonymous ID83958 Card SetPhysics Overview DescriptionMeasurement, Newton's laws, work, energy, conservation of energy, buoyancy, sound, electricity, circuits, magnetic forces, the atom, nuclear physics in medicine. Updated2011-05-05T15:31:27Z Show Answers