======================SCIENCE_MISC===================================== Acids_&_carbonlates liberate carbon dioxide produce a salt and water. CaC03 + 2HCI -> CaCl2 + H20 + CO2_gas Co+2 + C03-2 +2H30+ +2CI- -> Ca+2 + 2CI- +3H20 + CO2_gas CaC03 +2HCI -> CaCl2 + H20 +CO2_gas Co+2 +C03-2 +2H30+ +2CI- -> Ca+2 + 2CI- +3H20 +CO2_gas ---------------------------------------------------------------------------- vacuum tube, electrons from cathode to anode. dischargingcell negative ions from cathode to anode. ---------------------------------------------------------------------------- voluem = 22.4138 liter R = 8.31441J/K PV=RT PV=nRT R = .0821 liter-atms/K/mole 1 Mole = 6.022045e23 units ---------------------------------------------------------------------------- eathin lncline 23.45 deg dia sun 1.39e9n dia moosn ---------------------------------------------------------------------------- c = light = sqrt(1/e*u) Z = sqrt(u/e) = 377 ohms c = sqrt(S/u) S = tension on wire = pressure/volume u = mass per lenght or mass per volume soundpress loevel spl ---------------------------------------------------------------------------- man 3megcal/day = 3/4 lb fat running 600kcal/hr wlk = 200, sit = 100 ------------------------------------------------------------ Rochelle_salts NaKC4H4O6 double salt, used in medicine, sodium potclssiun tartrate,, ---------------------------------------------------------------------------- Space Power Miniature_Radioisotope_Power_Source About the size of a small flashlight, a proposed unit could power small instruments for years. 16.5cm _________________________________ | Radioisotope 7 AA LiTiS2 Cells | + _|__ _____ _______ _______ | | |==| | |_______||_______| | _ _|__|==|_____| |_______||_______| | 4.7cm | Insulate |_______||_______| | |_________________________________| PowerController and Thermalpile NASA's Jet Propulsion LaboratorL: Pasadena, California A proposed miniature power source would generate electricity for years without addition of fuel or dependence on sunlight. Called the powerstick, it would be relatively inexpensive lightweight, and rugged in comparison with other radioisotope thermoelectric generators that have been designed in recent years. The powerstick could supply power to small vehicles or scientific instruments in remote locations on Earth or in outer space. Some envisioned uses include Mars miniature rovers and monitoring equipment for toxic or nuclear storage sites. The powerstick consists of a radioisotope heater unit, a thermopile made of state-of-the-art thermoelectric material, a rechargeable battery, and control circuitry (see figure). During a full discharge from an initial full charge, the battery could supply 28 W.h of energy (1 A.h at 28 V). The total mass of the power stick would be approximately 380 grams. The radioisotope heater unit is a spot heater, produced by the U.S. Department of Energy, that contains a relatively small amount of radioisotope fuel and is commonly used on spacecraft. This unit provides 1 W of thermal power. Multilayer thermal insulation would direct most of the heat flux toward the thermopile, battery, and control circuitly, where it would not only supply energy for thermoelectric conversion, but would also maintain the battery and circuitry at the proper operating temperature. The thenopile would convert some of this thermal power to 40 mW of continuous electric power, which would be used to trickle-charge the batte´y. It would take about one month to fully recharge the battery after full discharge. The thermopile consists of about 1000 bismuth telluride legs that are 3 cm long and have a square cross section of 1/3 mm on a side. The battery in the powerstick would consist of fourteen LiTiS2 rechargeable cells of standard AA size, characterized by low self-discharge rate. The energy densities of these cells are 120 W.h/kg - about four times that of nickel/cadmium cells. The 28-V output of the battery could be downregulated by a microchip regulator or a dc-dc converter to various lesser voltages with an efficiency of about 85 percent. This work was done by Artur B. Chmielewski of Caltech for NASA's Jet Propulsion Laboratory. For further information, write in 25 on the TSP Request Card. NPO- 19339 ---------------------------------------------------------------------------- ____________________ |\ PPPPPPPPPPPPPPPPPPPP | T T | 4 T | 1 4 T | 1 T | 1 4 T PVT surface air ^ | 1 T /|\ | 1 4 T | | T 2 4 T Pres | T 2 3 | T 2 3 \ T T \ T T \ T T \ T T \ | \ T T _\| \ T T Vol \ VVVVVVVVVVVVVVVVVVVVV \ | | \|___________________| <--- Temp 1 2 3 4 Carnot cycle || || || || || || || || || || || || ||__||__|| || || || || || ||__||__|| ||______|| ||__||__|| || || || ||______|| || || ||______|| ||__||__|| || || || ^ || || || ||______|| || ^ || || | || || | || || | || || | || || | || || v || || v || ||______|| ||______|| ||______|| ||______|| |________| |________| |________| |________| Isothermal Adiabatic Isothermal Adiabatic expansion expansion compression compression high temp low temp Carnot cycle ---------------------------------------------------------------------------- Distance = velocity*time + acceleration*time^2/2 velocity = acceleration*time ______ | MASS |__\ Force_Newtons=Mass_Kgm*Accelerate_m/s^2 |______| / Force_lbf=Mass_Slugs*Aceler_ft/s^2 ENERGY_kinetic = Mass*Velocity^2/2 FRICTION | Force_tan \|/ FRICTION __V___ Force_Friction |coef_u|__\ |______| / Force_Friction =coef_u*Force_tan ^^^^^^^^^^^^^^ metal_u =0.5 glass_u =1 telfon_u =0.04 Torque ____ _____ |__ \______________/ ___| / \ / \//_/ ______________ \___ //____/ \_____| ||// ||/___ ----- Torque = Radius*Force ___ Acceleration_gravity / \ \___/ Acceleration_gravity = g = 9.8m/sec^2 | Force_Newtons=Mass_Kgm*Accelerate_m/s^2 \|/ V 100Kgm = 220.46lbs Man ---------------------------------------------------------------------------- ENERGY_potential_J = Force_Newtons*Distance_m Joule = 1_Newton*1_meter = Kgm*(m/s)^2 Watt = Joule/sec _ | | |~~~~~~~~~~~ | | \___________ / \ | |~~~| | 1KWHr = 1_liter_H20 @ 367meters |___| | (1_liter weights 9.8Kgm) | ~~~~~~~~~~~~| ___________/ 1KWHr = 220lb_man @ 108ft ___--- ---___ '------`'------` /()\ ____________ /_||_\ _/ _/ _/ 1KWHr = 220lb_man @ 108ft _/ ____________/ ---------------------------------------------------------------------------- Force_gravity = G_constant*Mass_1*Mass_2/Radius G_constant = 6.670E-11 Newtons*meter^2/Kgm^2 ---------------------------------------------------------------------------- ___ STOKE'S LAW STOKE'S LAW _---_ \ / \ | Force=6*PI*Radius*Velocity*Viscosity | --->| \|/ Force=K_Constant*Velocity \_ R _/ V --- Velocity ---------------------------------------------------------------------------- Free_Fall_velocity = V_terminal*(1-exp(-k_constant*time/mass) ---------------------------------------------------------------------------- centipitcal_Force- Velocity^2/Radius ---------------------------------------------------------------------------- Orbit_earth = Radius_earth*sqrt(g_earth/radius_satelite) T_period = 2*PI*radius_satelite^(3/2)/(Radius_earth*g_earth^(1/2)) ---------------------------------------------------------------------------- Energy_Kinetic = Mass*Velocity/2 Energy_gravity = - G_constant*Mass_earth*Mass_satellite/Radius Force_spring = K_constant*Distance "elastic force" Energy_spring = K_constant*Distance^2/2 Power = Force*velocity Momentum = Mass*velocity Tangental_speed = angular_velocity*radius Moment_of_interia = Sum_all_i(mass_i*radius_i^2) Torque = Moment_of_interia*angular_acceleration =Force*Radius ---------------------------------------------------------------------------- Lontitudal_strain = delta_length/length "tensile strain" Youngs_modulus = stress/strain Stress = Force/Area for metal Youngs_modulus = 10=>30Meg_lbs/in^2 Lead = 2Meg_lbs/in^2 92 stop ___ X/ / height strear_strain = delta_X/height /__/ strear_modulus = (Force_Tangent/Area)/(delta_X/height) for metal strear_modulus = 3=>10Meg_lbs/in^2 Lead = .8Meg_lbs/in^2 Volume_strain = delta_volume/volume Bulk_modulus = (delta_pressure)/(delta_volume/volume) Bulk_modulus =~ Youngs_modulus compressablity = 1/Bulk water =(34lbs/in^2)^-1 ---------------------------------------------------------------------------- Spring_harmonic = Mass*Velocity/2 + K_constant*Distance^2/2 period = 2*PI*Mass/K_constant Suspended_spring_period = 2*PI*Mass/K_constant pendulum_period = 2*PI*sqrt(Length/gravity) _ /_/_/_ / / _/_ | | |___| ---------------------------------------------------------------------------- Tidal waves shallow depth c = sqrt(g*h) Tidal waves shallow depth c = sqrt(g*h/2*PI) ---------------------------------------------------------------------------- Density Gold/Silver = 10=>20 gm/cc Alum/Iron = 3=>8 gm/cc water = 1 gm/cc ---------------------------------------------------------------------------- Surface_tension /\ / \ / \ _/ \_ (_) (_) __________/ \______/ \________ Surface_tension = force to lift a loop of wire = Force/(2*length) water = 70dynes/cm oil/alcohol =~30dynes/cm Pressure_inside_soap_bubble = 4*Surface_tension/radius... bigger bubble=more pressure ---------------------------------------------------------------------------- Bernoullis equation Bernoullis equation constant = pressure +density*gravity*height +density*velocity^2/2 ---------------------------------------------------------------------------- viscocity viscocity "stokes law" Force = viscocity*Area*(delta_velocity/delta_length) one poise - 1dyne*sec/cm^2 oil = 10 poise water = 1centipoise air = 181micro poise Pipe_fuild_Quantity = = (PI/8)*(Radius^4/viscocity)*(delta_pressure/length) ---------------------------------------------------------------------------- Velocity_terminal = (2/9)*(radius^2)*(gravity/viscocity)*(density_differnce) Lift_force= (1/2)*Wing_Area*density*(V_1^2 -V_2^2) ---------------------------------------------------------------------------- Reynolds_Number Reynolds_Number = above is turbulent Reynolds_Number = density*velocity*diameter/viscocity Reynolds_Number = 216 for air, 1000 for water ---------------------------------------------------------------------------- Temperature_expansion = delta_volume/delta_temperature metals = 40 to 70 ppm quartz is 1ppm liquid is 200 to 1000ppm one calorie = 1/860 watt*hours one BTU = 251.996 cal Heat capacity metal is 30 to 200 millical/(gm*C) water is 1000 millical/(gm*C) defined.. Heat of fusion water is 79cal/gm Heat of vapor water is 539cal/gm ---------------------------------------------------------------------------- Thermal_conductance metal_copper_alum = 1/2 to 1 (cal/sec)/(cm*deg_C) ice/concrete = 1 to 2 milli (cal/sec)/(cm*deg_C) wood = 100micro (cal/sec)/(cm*deg_C) air = 60micro (cal/sec)/(cm*deg_C) ---------------------------------------------------------------------------- Planks_spectral_emission = W_f = (2*PI*h/c^2)*(f^3)/(exp(h*f/Kt)-1) c = speed_light Radiation_black_body = Wbb = universal_constant*Temp^4 ---------------------------------------------------------------------------- universal_constant = 5.672E-8 watts/(m^2*K^4) pressure*volume = Number_atom*R_constant*Temp Volume = 22.4 liters 1atm = 1.01E6dynes/cm^2 ---------------------------------------------------------------------------- Adiabatic = no heat enters or leaves isochoric = volume the same iso thermal = constant temperature isobaric = constant presssure effeciency_carrot = 1-Tc/Th Entropy = delta_heat/temperature =1cal/deg_K ---------------------------------------------------------------------------- heat 1kgm water 0 to 100 C /373 S2 -S1 = | mc*(dt/T) =mc*ln(373/273) /273 ---------------------------------------------------------------------------- Travelling wave = string on tension tension = s mass_per_unit = u velocity = sqrt(tension/mass_per_unit) tranverse_impulse = s*delta_x*time/c tranverse_momentum = u*c*delta_x*time ---------------------------------------------------------------------------- Fluid_wave c = sqrt(gravity*height) = fuild c = sqrt(youngs_module/density) = bar c = sqrt(Bulk_module/density) = bulk c = sqrt(alpha*K*T/M ) = M_molecular_wave c =sqrt(1/(e0*u0)) phi=u0*H eo*E ---------------------------------------------------------------------------- H ^ /|\- | - |______\ E \ /- \ - \ - - \ - \ E /______\ -\ |\ - | \ -\|/ \ V H \- _\| S ---------------------------------------------------------------------------- Electrical c =sqrt(1/(e0*u0)) phi=u0*H eo*E Z = E/H = sqrt(u0/e0) = 377ohms Columbs_law force = K_coul*q1_coul*2_coul/radius^2 K_coul = 8.98E9Newtons*meter^6/coul^2 Energy_density = e0*E/2 Cap = e0*A/length ---------------------------------------------------------------------------- Magnetic Force = q_coul*(velocity X B_field) B_field = d_Phi/d_area circular orbit radius = mass*velocity/(B_field*q_coul) B_field = u0*number_turns*H = uo*H L_inductance = Number*Phi/current Energy = L_inductance*current^2/2 ---------------------------------------------------------------------------- Sound_intensity = Pressure_Amplitude/(2*density*velocity) max_tolerable_sound = 94uW/cm^2 (280dynes/cm^2)/(2*(1.22E-3gm/cc)*3.46E4cm/sec) ---------------------------------------------------------------------------- softest = 10E-16W/cm^2 conversation =10uW/cm^2 shouting =30uW/cm^2 120dB =200dynes/cm^2 80dB = 2dynes/cm^2 ---------------------------------------------------------------------------- 1Gev = gamma rays = Proton rest mass 1Mev = gamma rays = electron rest mass 1Kev = X rays 1ev = light 1mV = short wave 1uV = broadcast ---------------------------------------------------------------------------- bremsstahlung "braking radiation" Xrays | __ | / \ Nucleus \ \__/ \ \__________\ electron | Xray / |/__ ---------------------------------------------------------------------------- Compton_effect light is scatterred by electrons __ /| lower frequency Photon ___\ (e) ==> / Photon / (e) _\| ---------------------------------------------------------------------------- momemtum of photon = p = m*c =E*c/c^2 = h/wave_length Energy = h*v Pair production, cannot happen in empty space photon needs to be near a massive particle __ __ __ Nucleus / \ Nucleus / \ /| \__/ = => \__/ (e) Photon______\ (-e) / |/_ Pair anilihation, can happen in empty space ---------------------------------------------------------------------------- Photoelectric effect Full energy of photon goes into "bounded system" delta_E*delta_time >= h delta_p*delta_x >= h stationary waves require whole number of wavelengths in a orbit. ---------------------------------------------------------------------------- A free electron cannot absorb a free photon, it must be bounded A free electron cannot emmit a free photon, it needs to be near a photon. ---------------------------------------------------------------------------- Large molecules 10E-6cm atom 10E-8cm proton 10E-13cm quark 10E-16cm electron 10E-16cm ---------------------------------------------------------------------------- ^ L /|\ _ momentum __|-------__ /| / | Radius \/ \_ _/ -------- Angular_mometum = Radius X mometum |<-----2a--->| _------_ energy only depends / \ on "a" __----/ --__ \ / 2a | \--->| \__ | _ / a | ----\--- / min_angular_mom_orbit \_ _/max_angular_mom_orbit ------ ---------------------------------------------------------------------------- 1 watch batterie draws 40u ---------------------------------------------------------------------------- Snell's law n1*sin(theta_1) = n2*sin(theta_2) ---------------------------------------------------------------------------- exp(j*X) cos(x) +j*sin(x) ---------------------------------------------------------------------------- Maxwell's Equations __ \/ dot J = -delta_p/dt __ \/ cross E = -delta_B/dt V=delta_Phi/dt __ \/ cross H = J+ delta_D/dt H =I*N __ \/ dot D = p __ \/ dot B = 0