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December 9, 2016

Search: A 18.0 V battery is connected to a 4.10 µF capacitor. How much energy is stored in the capacitor?

Number of results: 44,293

physics
7. A 2000.0 kg boulder sits on the top of a 50.0 m cliff. As the boulder rolls off, it loses 3.0% of its mechanical energy as heat. How much heat energy goes the boulder lose? How much mechanical energy does the boulder have right before hits the ground?
December 6, 2009 by henry

PHYSICS
1kg of fat is equal to 30MJ of energy.the efficiceny of converting fat to energy is 20%. suppose you life a mass of 12kg 2.0m vertically,500 times, how much work do you do? if all the energy used to do the work comes from the burning fat how much fat is used ?
April 1, 2013 by Riana

physics
a point charge q2 equals negative 2.1 micro C is fixed at the origin of a coordinate system. another point charge q1 equals 4.1 micro C is initially located at point p a distance d1 equals 6.1 centimeters from the origin along the x axis
February 8, 2012 by john

electrical principles
Four resistors , each of 240ohms are connected in parallel , and the group then joined in series with a heater of 40ohms resistance. Then complete circuit is connected to a 240volts supply . Calculate total resistance in the circuit , the power dissipated in the parallel group...
March 19, 2015 by Achwil Solo

science
A point charge of -4 mu or micro CC is located at x = 4 m, y = -2 m. A second point charge of 12 mu or micro CC is located at x = 1 m, y = 4 m. (a) Find the magnitude and direction of the electric field at x = -1 m, y = 0. I got 4545.69 N/C by using this equation E= kQ/r^2 (...
September 2, 2014 by kenzie

Physics-College
You have a 50V battery in a circuit with a single resistor R. If the resistor dissipates 200 J of energy in 5 seconds, what is its resistance?
February 4, 2010 by Katie

Energy (physics)
The wound spring of a clock would possess the same potential as kinetic energy. I am I correct in that statement. No. The wound spring has PE. Now what is this writing of KE? What is moving? how is it connected or related to the wound spring?
November 5, 2006 by tatiana

Physics
a) Family Smith has already installed PV in their house. Now, they also want to cover their needs for warm water with solar energy. For this, they consider having a solar thermal water heating system. Considering that the need for warm water is 100L/day, the water has to be ...
October 24, 2013 by youlifex

Physics*
A car is designed to get its energy from a rotating flywheel (solid disk) with a radius of 1.00 m and a mass of 575 kg. Before a trip, the flywheel is attached to an electric motor, which brings the flywheel's rotational speed up to 5,000 rev/min. (a) Find the kinetic energy ...
October 20, 2011 by Allie

Physics
To move 8.0 of charge from one electrode to the other, a 12- battery must do how much work?
June 4, 2011 by John

Chemistry
Sulfuric acid/ Lead Battery: -the electrodes for the battery are composed of Pb(s), PbO2, and/or PbSO4. What are the half reaction occuring at each electrode? include electrolysis of water: Process Anode/Cathode Initial Charging: Discharging Recharging
April 26, 2008 by sara

ENEGRY COSTS
I need to know how much it would cost to build the following plants (as in factories): Solar energy plant Biomass plant Geothermal energy plant Wind energy plant nuclear Energy plant
April 9, 2009 by Lena

Physics
There 46.5J of elastic potential energy stored in a spring. How far is the spring stretched if the spring constant is 455N/m
March 24, 2015 by Jacob

Physics
50.0pJ of energy is stored in a 3.00cm × 3.00cm × 3.00cm region of uniform electric field.
May 9, 2014 by Anonymous

physics
A 20.0-kg model plane flies horizontally at a constant speed of 12.2 m/s. (a) Calculate its kinetic energy. . J (b) The plane goes into a dive and levels off 20.0 m closer to Earth. How much potential energy does it lose during the dive? Assume no additional drag. J (c) How ...
May 11, 2012 by Brianna

physics2
Charges are placed on an equilateral triangle (all angles are equal and equal to 60 degrees). The length of each side of the triangle is 5.7 meters. A charge of +7.1 micro-Coulombs is placed at the bottom corner of the triangle and another charge of +7.1 micro-Coulombs is ...
January 29, 2011 by kelly

Physics HELP!!!
A certain satellite has a kinetic energy of 7.5 billion joules at perigee (closest to Earth) and 3.5 billion joules at apogee (farthest from Earth). As the satellite travels from apogee to perigee, how much work does the gravitational force do on it? Does its potential energy ...
February 28, 2012 by Steve

Foreign languages
Thank you very much for checking this part on scientific English. Here is the last part. 1) The superconductors are also characterized by the so called Meissner-Ochsenfeld Effect. When a superconductor is put in (into) a magnetic field, it produces a magnetic field which ...
June 4, 2012 by John

physics im stuck
A small plastic ball of mass 6.10 10^-3 kg and charge +0.150 µC? A small plastic ball of mass 6.10 10^-3 kg and charge +0.150 µC is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, with the thread making an angle of...
August 31, 2008 by physdummy

physics
Two capacitor plates are equally and oppositely charged. They are separated by 6.30 cm. An electron is released from rest at the surface of the negative plate and, at the same time, a proton is released from rest at the surface of the positive plate. Where do the electron and ...
February 5, 2016 by niro

physics
Two capacitor plates are equally and oppositely charged. They are separated by 6.30 cm. An electron is released from rest at the surface of the negative plate and, at the same time, a proton is released from rest at the surface of the positive plate. Where do the electron and ...
February 6, 2016 by niro

computer science visual basic
I need help Application: Create a GeneratedNumber application that stores in an array with indexes 1 through 100 numbers generated by the index values when Generate is clicked. Generate the number to be stored at each index by summing the index and it's individual digits. For ...
January 16, 2016 by Ace

PHYSICS HELP PLEASE
The spring constant of a toy dart gun is 4442 N=m. To cock the gun the spring is compressed 1.5 cm. The 8 g dart, fired straight upward, reaches a maximum height of 26 m. The acceleration of gravity is 9.81 m/s2 : Determine the magnitude of the energy dissipated by air ...
March 4, 2007 by kitt

Physics
When does the potential difference between the two terminals of the battery be zero? I think it will be zero if the battery is consumed entirely or when the circuit is open. I thought a lot but have no good answer, please help
December 21, 2015 by Asmaa khalaf

Physics
Any dielectric material other than vacuum has a maximum electric field that can be produced in the dielectric material before it physically or chemically breaks down and begins to conduct. This maximum electric field is called dielectric strength. The dielectric strength for ...
March 6, 2010 by Susie

Physics- springs
Block A has a mass 1.00kg, and block B has a mass 3.00 kg. the blocks are forced together, compressing a spring S between them; then the system is released from rest on a level, frictionless surface. The spring which egligible mass, is not fastened to either block and drops to...
April 25, 2012 by David E.

science
From the origin of an electric dipole, the charge is 25(micro coulomb) and after a distance of 62cm, the charge is -16(micro coulomb). At what point from the origin the value of electric dipole will be zero.
September 2, 2013 by Anonymous

sci i think its b
A student is trying to identify the different forms of energy described in the following chart: Form of Energy Description Examples Energy A energy that travels in waves through space light radio waves Energy B energy that depends on the height of an object a person at the top...
November 12, 2014 by somebody help i am new

Physics
A copper wire is 7.00 m long and has a cross-sectional area of 1.00 10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to a battery that applies a potential difference of 0.200 V. If the loop is placed in a uniform magnetic field of ...
November 11, 2010 by Max

physics
Multiple-Concept Example 9 discusses the physics principles used in this problem. Three resistors, 2.2, 3.9, and 6.4 Ω, are connected in series across a 24-V battery. Find the power delivered to each resistor. resistance (Ω) power (W) 2.2 ______ 3.9 ______ 6.4 ______
January 26, 2011 by ali-1

Physics
A spring has a force constant of 546.5 N/m. Find the potential energy stored in the spring when the spring is a) stretched 4.18 cm from equilibrium. Answer in units of J
December 11, 2011 by Angel

physics 2
Three charges are placed on the y axis. One charge of -3.2 micro-Coulombs is placed at y = 0, another charge of +2.6 micro-Coulombs is placed at y = -0.29 meters, and another unknown charge is placed at y = +0.51 meters. The total force on the charge at y = 0 due to the other ...
January 18, 2013 by Jessica

Circuits and electronics applications3
Figure 1 below shows the circuit we'll be using to explore the step response of an RLC circuit. The voltage source produces a 1V step at t=0. Initially the resistor has been set to 0Ω. We'll be probing the voltage across the capacitor, which will indicate the amount of charge...
November 25, 2016 by sengeni

Physics
I don't know how to approach this question... Any dielectric material other than vacuum has a maximum electric field that can be produced in the dielectric material before it physically or chemically breaks down and begins to conduct. This maximum electric field is called ...
March 4, 2010 by Sandra

physics
A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell with positive charge ...
February 10, 2012 by Mandaleigh

physical science
how much current flows through a circuit if the resistance is 4 ohms and there is a 12-volt battery?
July 3, 2008 by Ajnaba

College Physics
To move 5.0 C of charge from one electrode to the other, a 12-V battery must do how much work? 60 J 5.0 C 12 J 12 V 60 W
February 6, 2010 by Lanise

physical science
how much current flows through a circuit if the resistence is 4 ohms and there is a 12 volt battery?
April 3, 2010 by curt

Science
How much current does a flashlight use if its battery supplies 3.0 Volt and the bulb has a resistance of 4.0 Alpha
April 7, 2015 by Kyle

Physics
The rigid object shown in Fig. 10-63 consists of three balls and three connecting rods, with M = 1.5 kg, L = 0.67 m, and θ = 32°. The balls may be treated as particles, and the connecting rods have negligible mass. Determine the rotational kinetic energy of the object if...
July 28, 2010 by Anonymous

Physics
Real world trampolines lose energy since they are damped springs with much internal friction. How much energy does the sumo wrestler lose on each bounce in this situation? Information I was given: mass=400 kg gravity=10N/kg k = 12000 N/m I also know from the previous question ...
February 6, 2016 by Charlotte

math
Ismael bought a new phone. After the first 5 hours of use, the average remaining lifetime of the battery is 7 hours. Find the probability that the battery will last between 11 and 15 hours.
October 9, 2015 by ISMAEL

Help? PHYSICS
1.) a 5.0 kg stone slid up a frictionless ramp that has an incline of 25 degree. How long is the ramp if gravitational potential energy associated with the stone is 2.4 x 10^2 J. 2.) A pogo stick contains a spring with a constant force of 1.5 x 10^4 N/m. Suppose the elastic ...
October 22, 2009 by lalaglaze

Physics
Problem 21.79 The plates of a 3.2nF parallel-plate capacitor are each 0.25 m^2 in area. Part A - How far apart are the plates if there's air between them? Express your answer using two significant figures. = Part B - If the plates are separated by a Teflon sheet, how thick is ...
September 11, 2011 by Paige

physics
Two astronauts, each having a mass of 78.5 kg, are connected by a 10.0-m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.50 m/s. Treating the astronauts as particles, calculate each of the following...
December 1, 2012 by heather

Physics
Problem 21.79 The plates of a 3.2 nF parallel-plate capacitor are each 0.25 m^2 in area. Part A - How far apart are the plates if there's air between them? Express your answer using two significant figures. Part B - If the plates are separated by a Teflon sheet, how thick is ...
September 13, 2011 by Paige

physics
when awire of length 5m and radius 0.5mm is stretched by a load of 49Nthe elongation produced in the wire is 0.1cm. find the energy stored per unit volum of the wire
May 23, 2013 by Anonymous

physics
A 1.50-V battery supplies 0.244 W of power to a small flashlight. If the battery moves 2.53 1020 electrons between its terminals during the time the flashlight is in operation, how long was the flashlight used?
February 17, 2013 by taryn

Science
2. Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other? (1 point) The faster object has the same kinetic energy as the slower object. The faster object has less ...
June 7, 2014 by Austin

Physics ASAP PLease
A spherical capacitor consists of a spherical conducting shell of radius b and charge -Q concentric with a smaller conducting sphere of radius a and charge +Q . Enter an expression for the capacitance of this device in terms of Coulomb's Constnat K_e (just type "k") and the ...
November 6, 2013 by asha

physics
A spring loaded gun is used to shoot a 1.3 kg ball from a rooftop. When the gun is fired, a compressed spring will be released shooting the ball into the air. The ball will travel in a parabolic path eventually striking the ground below. The gun is at an angle of 39° above ...
May 5, 2013 by Anonymous

science
1. How much potential energy does a 5kg block have if it is 2m above the ground? 2. What is the mass of an object that has 40J of potential energy and is 10m above the ground? 3. What is the weight of an 8kg object? 4. How much work does it take to lift an 8kg object 2m? 5. ...
October 22, 2011 by Dave

computer ( theory )
A designer wishes to include some multimedia components on a web page. a) If the designer has some images stored in files, there are two possible formats for the files.. i) Describe the approach used if a graphic is stored in a vector graphic file ii) Describe the approach ...
July 16, 2016 by DAVID

Physics
The length of a spring increases by 7.2 cm from its relaxed length when a mass of 1.4 kg is hanging in equilibrium from the spring. (a) What is the spring constant? (b) How much elastic potential energy is stored in the spring? (c) A different mass is suspended and the spring ...
March 26, 2011 by Work needed!

biology
Picture true of false The atom shown in the diagram has 4 energy levels or shells. 2. The atom shown in the diagram above has a total of 5 electron orbitals. 3. Each energy level consists of 2 or more orbitals. 4. The second energy level consists of 4 electron orbitals. 5. ...
February 11, 2016 by Anonymous

Physics
A small ball with a mass of 30.0 g is loaded into a spring gun, compressing the spring by 13.0 cm. When the trigger is pressed, the ball emerges horizontally from the barrel at a height of 2.30 m above the floor. It then strikes the floor, after traveling a horizontal distance...
November 11, 2014 by Michelle

Physics (very long question)
Two astronauts (Fig. P8.68), each having a mass of 84.0 kg, are connected by a 10.0 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway betwen them at a speed of 5.80 m/s. Treating the astronauts as particles, calculate each of the...
November 18, 2010 by Anonymous

physics
please check my answers what are the SI units for momentum? kg*m/s which of the following is not involved in hitting a tennis ball? a. kinetic energy b. chemical potential energy c. gravitational potential energy d. elastic potential energy i picked B How much power is ...
February 16, 2009 by y912f

College physics
A toy car has a mass of 120g, including two 1.5 V batteries connected in series. Suppose the motor that drives the car is 80\% efficient (i.e., 80\% of the electric energy goes to the drive wheels, 20\% is dissipated as heat) and that friction and air resistance are negligible...
July 17, 2010 by katie

Physics
The voltage across an air-filled parallel-plate capacitor is measured to be 219.0 V. When a dielectric is inserted and completely fills the space between the plates as in the figure below, the voltage drops to 64.4 V. What is the dielectric constant of the inserted material? ...
September 23, 2010 by chuck

Physics
If a 60 kg meteor falls to earth from a great distance. How much gravitational potential energy does it lose? (the energy PE is 0 at a great distance). What happens to this potential energy? Final-Initial=-Gmm/r-0=change in energy
January 31, 2013 by Brittany

physics
An old battery with an emf of 9.0 V has a terminal voltage of 7.8 V when it is supplying a current of 1.5 mA. What is the internal resistance of the battery? 800 Ω 900 Ω 400 Ω 600 Ω
February 24, 2014 by mercedes

Physics
George has a bar magnet and a coil connected to a battery. To perform an experiment, he needs to use different values of current through the wire. How can he generate different values of electric current through the wire without connecting any other device in the circuit?
June 4, 2008 by BAdams

physics
The mass of a carbon atom is 2 x 10 ^ -26. What is the kinetic energy of a carbon atom moving with a speed of 500 m/s? I got 2.5 x 10^-21 which is correct. The second question states: Two carbon atoms are joined by a spring-like carbon-carbon bond. The potential energy stored ...
November 30, 2009 by Julia

Biochemistry
In the electron transport chain, electrons from FADH2 are eventually used to reduce O2 into H2O. Experimentally, the proton motive force created by this process will generate 2 ATP molecules from ADP and Pi, using ATP synthase. From the information provided below, calculate ...
April 10, 2012 by Mike

physics
two air carts of mass m1=0.84kg and m2=0.42kg are placed on a frictionless track. cart1 is at rest and has a spring bumper of constant force F=690N/m.cart2 has a metal bumper and moves towards cart1 with a speed V=0.68m/s. A) what is the speed of the two carts at the momentum ...
July 6, 2011 by said

Physics
Imagine you are driving a car up Pike’s Peak in Colorado. To raise a car weighing 1000 kilograms a distance of 100 meters would require about a million joules. You could raise a car 12.5 kilometers with the energy in a gallon of gas (if all stored chemical energy was ...
November 12, 2016 by JAY

Physics
A 10.-newton force is required to hold a stretched spring 0.20 meter from its rest position. What is the potential energy stored in the stretched spring?
January 23, 2013 by Vic

physics
The student’s body is 22% percent efficient; that is, for every 22 J that are converted to mechanical energy, 100 J of chemical energy are expended, with 78 J going into thermal energy. How much chemical energy is expended by the student during the climb? Answer in ...
January 12, 2015 by allan

Physics
A car owner forgets to turn off the headlights of his car while it is parked in his garage. If the 12.0-V battery in his car is rated at 150.0 A · h and each headlight requires 41.4 W of power, how long will it take the battery to completely discharge?
February 7, 2013 by Mayra

physics
The force required to flex a nasal strip and apply it to the nose is 0.25 ; the energy stored in the strip when flexed is 0.0025 . Assume the strip to be an ideal spring for the following questions.
October 16, 2011 by m,bmbnm

Physics
when a wire of length 5m & radius 0.5mm is stretched by a load of 49N the elongation produced in the wire is 0.1cm find the energy stored per unit volume of the wire?
May 31, 2013 by Sonal

PHYSICS
When a wire of lenght 5m & radius 0.5mm is stretched by a load of 49N,the elongation produced in the wire is 0.1cm. Find the energy stored per unit volume of the wire.
June 3, 2013 by Megha

Physics
a bike is 25% efficient in converting energy of the bicyclist to mechanical energy. If a cyclist is travelling along a pathway at a constant speed of 5.8 m/s for 3600 s, and the average resistance is 22 N, how much mass does she lose assuming 1 kg is lost for each 2.9 x 10^7 J...
April 12, 2011 by Francis

Physics repost
George has a bar magnet and a coil connected to a battery. To perform an experiment, he needs to use different values of current through the wire. How can he generate different values of electric current through the wire without connecting any other device in the circuit?
June 4, 2008 by BAdams

science
where do i find a picturee of a plant cell http://micro.magnet.fsu.edu/cells/plantcell.html
October 13, 2006 by saraion

Math
You can buy one 10 pack of AAA batteries for $5.49 and get one battery free, or you can buy two 4 packs for $2.98. Which has the lower unit price per battery? please help and show me the steps, thank you
January 6, 2015 by Claire

Chemistry
Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225mL of battery acid?
May 2, 2014 by Anonymous

physics
A conducting sphere that carries a total charge of -6 micro-coulomb is placed at the center of a conducting spherical shell that carries a total charge of +1 micro-coulomb. The conductors are in elecctrostatic equilibrium. determine the charge on the OUTER SURFACE of the shell...
July 8, 2010 by Mrs. A

Chemistry
Liquid Butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 39.3g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
January 31, 2008 by Lauren

Chemistry
Liquid Butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 39.3g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.
January 31, 2008 by Lauren

Physics
A piece of copper wire has a resistance per unit length of 5.95 10-3 /m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.200 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the center of the coil. In ...
September 27, 2007 by Mary

Physics EM
A battery with EMF 90.0 V has internal resistance R_b = 8.68 Omega. What is the reading V_v of a voltmeter having total resistance R_v = 485 \Omega when it is placed across the terminals of the battery? Express your answer with three significant figures. V_v =88.4V This is the...
March 10, 2008 by Spencer

statistics
The life span of the battery pack is known to be Normally distributed with a mean of 250 hours and a standard deviation of 20 hours. How to find the percentage of the battery packs lasting more than 250 hrs.
May 6, 2012 by noe

Chemistry
In 1901, Thomas Edison invented the nickel-iron battery. The follwing reaction takes place in the battery. Fe(s) + 2 NiO(OH)(s) + 2 H2O(l) Fe(OH)2(s) + 2 Ni(OH)2(aq) How many mole of Fe(OH)2, is produced when 3.70 mol Fe and 6.95 mol NiO(OH) react?
February 24, 2014 by Grace

physics
Any dielectric material other than vacuum has a maximum electric field that can be produced in the dielectric material before it physically or chemically breaks down and begins to conduct. This maximum electric field is called dielectric strength. The dielectric strength for a...
March 7, 2010 by lauren

Physics
If a total mass of 11.1 kg falls 5.23 m and all of the mechanical energy is converted to internal energy, by how much will the internal energy of the water increase? The acceleration of gravity is 9.81 m/s 2 . Assume no energy is transferred as heat out of the vessel to the ...
February 12, 2012 by Joe

Science
Compare how much kinetic energy and potential energy the ball has at each point and describe why the ball has that energy
January 17, 2013 by Brandon

marketing
Some firms are too production-oriented and inefficient. That can result in customers who are not satisfied and micro-marketing that can cost too much. Identify and explain at least three reasons for these marketing inefficiencies.
May 6, 2011 by Brad

Math (Confused, no idea where to begin)
The voltage V across a charged capacitor is given by V(t) = 2e^-0.16t volts, where t is in seconds (A) what is the voltage V(5) after 5 seconds? Find the time t when the voltage will be 1 volt Enter your answers to two decimal places V(5) approximately ___________ volts t ...
October 3, 2014 by Picard

college physics
in a pinball machine, a force of 24 N is used to compress a spring a distance of 0.080m. a. What is the potential energy stored in the spring? b. What is the maximum speed tha it van produve in a ball of mass 0.15kg?
September 7, 2012 by Mariam

Physics
Two charges, -2.0 micro C and -6.0 micro C, are located at (-0.65 m, 0) and (0.65 m, 0), respectively. There is a point on the x-axis between the two charges where the electric field is zero. Find the location of the point where the electric field is zero.
March 26, 2011 by Ben

physics
a wire 4m long carrying current of 5A place at right angle to B of 6web/m2 the force experience by the wire in SI unit is A LONG SPRING IS STRETCHED BY 2Cm and P.E stored in it is U if the string is stretched by 10 cm then the P.E stored would be
July 3, 2012 by palwasha

physics
In the process of electrolysis, electrical power is used to separate water into oxygen and hydrogen molecules via the reaction: H2O --> H2 + ½O2 This is very much like running a hydrogen fuel cell in reverse. We assume that only the activation potential for the hydrogen ...
December 21, 2013 by Donald

Chemistry/math
Cesium-137 has a half-life of 30 years. Suppose a lab stored a 30-mCi sample n 1973. How much will be left in 2063?
April 15, 2009 by Angie

physics
A spring (k=80n/m) lies on a frictionless table, one end connected to the wall, the other to a 4kg block. The block is pulled, stretching the spring .5m. and then released. A) max elastic potential energy of system? b) total energy? C) what is the acceleration of the block at ...
January 30, 2014 by Amina

Physics
An electric filament can heat 200 cm3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?
March 4, 2013 by lindsey

PE Modified
What is energy that is immediately required for short periods of time by using stored glycogen as a source of fuel? I've looked all through the packet [which serves as my book] and still cannot find a single thing about any part of this question...
September 23, 2007 by anonymous

repost physics E&M please
A battery with EMF 90.0 V has internal resistance R_b = 8.68 Omega. What is the reading V_v of a voltmeter having total resistance R_v = 485 \Omega when it is placed across the terminals of the battery? Express your answer with three significant figures. V_v =88.4V This is the...
March 11, 2008 by Spencer

chemistry
An aluminum pan of mass 100 grams and at a temperature of 375°C is plunged into a vat of water. a. If the pan and the water end up at 45°C, how much energy did the aluminum pan lose? b. Assuming no energy goes into the environment, how much energy must the water have gained ...
May 26, 2015 by victoria

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