Electrical

1,051 results

Someone please help me with science?

1. Which of the following shows the correct sequence of energy transformations when listening to the radio? electrical; kinetic; sound; kinetic; electrical electrical; sound; kinetic; sound; electrical sound; electrical; kinetic; electrical; sound kinetic; sound; electrical; ...

Science

A generator transforms A. Potential energy into kinetic energy B. mechanical energy into electrical energy***** C. Magnetic energy into electrical energy D. Friction into electrical energy Electrical charges that are different A. Attracts each other**** B. repel each other C. ...

Science

How does an electrical current in a circuit produce thermal, sound, and magnetic energy? The electrical current flows through devices that convert the electrical energy to mechanical or electomagnetic waves. i have a science project do tommorrow but i need some pictures of the...

statics

Q: The mean annual salary for a sample of electrical engineers is $83,500, with a standard deviation The mean annual salary for a sample of electrical engineers is $83,500, with a standard deviation of $1500. The data set has a bell-shaped distribution. (a) Use the Empirical ...

electrical

The minimum size of a electrical cable recomended for use in power circuit is.

electrical technology

explain the importance of the telephone hammer in electrical installation

electrical

The minimum size of electrical cable recomended for use inpower circuits by the NEC in adomestic installation is

Science

What does a source of electrical energy do in an electrical circuit?

Grade 12 Chem - please check answer

The four possible unknown chemicals are: Cu(s), Ca(OH)2(s), KNO3(aq) and C6H12O6(aq). a) colorless solutions, high electrical conductivity, no change on litmus paper b)white crystals, no electrical conductivity, red to blue on litmus c) shiny brown wire, high electrical ...

University Physics II

A 13.9 nC charge is located at position (x,y) = (1cm,2cm). A. At what (x,y) position is the electrical field -225,000i_hat N/C? B. At what (x,y) position is the electrical field (-161,000i_hat + 80,500j_hat) N/C? C. At what (x,y) position is the electrical field (-21,600i_hat...

physics

Explain how voltage current and resistance could interact to give a person a severe electrical shock if he or she touched an electrical wire in the wrong way.

physics

an electrical baseboard heater drawws a current of 6.0A and has a potential difference of 240V. For how long must it remain on to use 220 000 J of electrical energy.

chemistry

Which phase of ionic compounds are good electrical conductors because the ions are free to carry electrical current? A. Solid B. Liquid C. Gas D. Crystalline I say B

science

i need help finding some household items that have some of the following forms of energy: radiant, chemical, nuclear, electrical, acoustic, thermal, and mechanical. so far i have the TV as electrical, acoustic, and mechanical; the stove top as electrical, caustic, mechanical, ...

Electrical Switches

What are the factors you consider when buying an electrical switch? I want to know what different people consider in order to obtain a good selection procedure. Thanks!

psychology

Neurons communicate with each other through: a) electrical language only b)electrical and hemical language c) the glial cells d)neurogenesis Is C correct answer?THANK YOU

Science

Please help. Copper has a low electrical conductor means a charge can move through it easily? (right?) electrical resistance is measured in units of volts. - (right?)

Physics

If the price of electrical energy is $0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?

physics

please check this: Which sentence best describes electrical conductors? a. electrical conductors have low mass density b. electrical conductors have high tensile strength c. electrical conductors have electric charges that move freely d. electrical conductors are poor heat ...

Physics/Chemistry

If the price of electrical energy is $0.10 per kilowatt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degrees Celcius?

Science

Which of these energy changes takes place in a solar cell? A.Heat energy to light energy B.Light energy to electrical energy C.Electrical energy to heat energy D.Thermal energy to electrical energy C?

Science

What type of energy from the Sun do plants use to make their own food? A.Chemical Energy B.Sound Energy C.Light Energy D.Heat Energy C? An MP3 player uses the chemical energy in a battery to produce electricity energy. The electrical energy makes the player work.When turned on...

math

The Greener Corporation produces electrical motorcycles and electric cars. The management wanted to produce at least 2 electrical cars and 8 electrical motorcycles but no more than 5 electric cars per month. The production department can produce a maximum of 20 electric cars ...

Physics

One million spherical points join a point.Radius of any point is r=5x10^-4cm, while electrical load is q=1.6x10^-14C.What is the energy that should be spent for possession of electrical forces?

physics

If the price of electrical energy is $0.10 per kilo-watt*hour, what is the cost of using electrical energy to heat the water in a swimming pool (12.0m*9.00m*1.5m) from 15 to 27 degree C? Can anyone please give me some hints to do it? Thanks a lot!

physics

An oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat energy. If the light bulb converts 75% of the electrical energy to thermal energy, and the oven is used for a ...

Pre algebra

Electrical poles that carry electrical wire seem to get smaller the farther away they are. Find the apparent height of each pole if the tallest pole is 50 ft tall and there is 100 ft between each pole.

physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...

physics

Approximately 5.5 X10^6 kg of water fall 50m over Niagara Falls each second. a) What is the decrease in the gravitational potential energy of the water-Earth system each second? b) If all this energy could be converted to electrical energy (can’t happen) at what rate would ...

Science Plzz Help

3. Which of the following correctly describes how nerve impulses move throughout the body? A. electrical transmission through neurons and electrical transmission between neurons B. chemical transmission through neurons and chemical transmission between neurons C. chemical ...

Physics

An electrical cable is atteched to the electrical pole 25m apart. The cable weighs 2.5N/m and can resist a pull of 300N . assuming that the cable takes a parabolic shape, detrmine the smallest value of sag in the cable

Physics

A power plant burns coal and generates an average of 630.0 MW of electrical power while discharging 1058.40 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period.

science

what is the importance of fuses? They are placed in electrical equipment and in houses (although most houses now use circuit breakers) as safety devices. If a short occurs and too much electrical current is going through the circuit, the fuse "blows" (meaning it melts, the ...

Psychology

The means of travel within and between neurons is different because: A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons. B. chemical signals move the impulses within the neuron, while electrical signals move impulses...

unstanding psychology

the means of travel within and between neurons is different because: a. electrical signals move impulses within the neuron, while chemical signals move the impulses between neuron. b. chemical signals move the impulses within the neuron, while electrical signal moves impulses ...

chem

Explain, in terms of electrical energy, how the operation of a voltaic cell differs from the operation of an electrolytic cell used in the Hall process. Include both the voltaic cell and the electrolytic cell in your answer. Would this be correct: In a voltaic cell, chemical ...

Psychology

The means of travel within and between neurons is different because: A. electrical signals move impulses within the neuron, while chemical signals move the impulses between neurons. B. chemical signals move the impulses within the neuron, while electrical signals move impulses...

psychology

the means of travel within and between neurons is different because: a. electrical signals move impulses within the neuron, while chemical signals move the impulses between neuron. b. chemical signals move the impulses within the neuron, while electrical signal moves impulses ...

Physics

Could someone please help me with these questions. . . 1. Why are there positive and negative electrical charges, while magnetic poles always seem to be bound together? 2.If two resistors are connected in parallel, how do you know that their effective resistance will always be...

physics

i'm still getting C as the answer to this one drwl said its wrong When a positive charge moves in the direction of the electrical field, what happens to the electrical potential energy associated with the charge? a. increase b. decreases c. remains the same d. increases ...

Physiology Midterm exam

1- List at least 5 most striking morphological and functional characteristics of nerves tissue make it different from other tissues? 2- Point out the advantages and disadvantages of chemical synapses as compared to electrical ones. Where in the human body can you find ...

physics

The Easy Bake Oven is a common toy for young children who want to emulate the process of cooking. Suppose this oven is plugged into a 120 V electrical outlet and "cooks" the food by using a 144 ohm resistor light bulb that converts electrical energy to both light and heat ...

Physics

A wind turbine has blades that sweep an area of 2000m2. It converts the power available in the wind to electrical power with an efficiency of 50%. What is the electrical power generated if the wind speed is 10ms–1? (The density of air is 1.3 kg m–3.)

PRE ALGEBRA

solution to electrical poles that carry electrical wire seem to get smaller the further away you are. Find the apparent height of each pole if the tallest pole is 50 feet tall and there is 100 feet between poles.

Chemistry

1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...

Chemistry

1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...

Science

Megan wants to determine if an electrical circuit has electricity flowing through it. Which of the following evidence is proof that the circuit has an electrical current? a)The circuit is a closed loop. b)A light bulb is lit in the circuit. c)The circuit's switch is in the ...

statistics

Average entry level salaries for college graduates with mechanical engineering degrees and electrical engineering degrees are believed to be approximately the same. A recruiting office thinks that the average mechanical engineering salary is actually lower than the average ...

Intro to psychology

The brain can be studied by using: A.) electrical, biochemical, and meagnetic means B.) Radio reguencies,computers and neurotransmission C.)neurotransmitting, electrical,and biochemical means D.) biochemical,neurotransmitting, and magnetic means I think the answer is C but unsure

college physics

(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

college physics

(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

college physics

a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

college physics

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

physics

(a) Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

PHYSICS

Two protons in a molecule are 3.80 multiplied by 10-10 m apart. Find the electrical force exerted by one proton on the other. Magnitude N (b) State how the magnitude of this force compares with the magnitude of the gravitational force exerted by one proton on the other. (...

chemistry

A student designs an ammeter (a device that measures electrical current) that is based on the electrolysis of water into hydrogen and oxygen gases. When electrical current of unknown magnitude is run through the device for 1.00 min , 15.4 mL of water-saturated H2(g) is ...

Physics 221

An electron that is a certain distance from a proton is acted on by an electrical force. a) If the electron were moved twice the distance away from the proton, would the electrical force be:

Physics Help Please!

If the price of electrical enegy is $0.10 per kilowatt *hour, find the cost of using electrical energy to heat the water in a 12.0m * 9.00m * 1.5m swimming pool from 15 degrees C to 27 degrees C. So the change in temperature is 285.15 , the volume is 162m^3, the specific heat ...

math

Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the resistance increasing ...

Physics multiple choice questions

1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...

Physics multiple choice questions

1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...

physics

A 120-V motor has mechanical power output of 3.00 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the energy delivered to the motor by electrical transmission in 2.00 h of operation. Do i divide the power by...

Psychology

According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...

Psychology

According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...

Chemistry

The world’s electrical demand is typically 1.4 x 10^13 W. If all the H2O(g)in the atmosphere suddenly condensed to liquid, and all the enthalpy of this process was captured and converted to electrical energy, for how long would this energy power the world? Assume the ...

Science

Molecules that make up matter move constantly.Which of these forms of energy refers to the energy of the moving molecules and why? A.Chemical Energy B.Thermal Energy C.Electrical Energy D.Light Energy Which device can change electrical energy to light and sound energy? A....

gen physics II

Very large capacitors have been considered as a means for storing electrical energy. If we constructed a very large parallel-plate capacitor of plate area 1.0 m2 using paper (k= 3.7) of thickness 1.0 mm as a dielectric, how much electrical energy would it store at a plate ...

Psychology

According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...

electricity 188

hi my name is christina and i have an electrical question i need help with. i am taking power engineering electrical 188. the question is: how much will ity cost to use 6 lamps of 100 W each if they burn for 5 hours each evening in a month (30 days). the cost of electricity is...

psychology

The brain can be studied by using: A)electrical,biochemical and magnetic means B)radio frequences,computers and neurotransmission C)neurotransmitting,electrical and biochemical means D)biochemical,neurotransmitting,and magnetic means, I THINK CORRECT ANSWER IS A OR B

Science

The brain can be studied by using: (Points: 5) electrical, biochemical, and magnetic means. radio frequencies, computers, and neurotransmission. neurotransmitting, electrical, and biochemical means. biochemical, neurotransmitting, and magnetic means. i think it is C but not sure

calculus

Throughout the 20th century, the yearly consumption of electricity in the US increased exponentially at a continuous rate of 7% per year. Assume this trend continues and that the electrical energy consumed in 1900 was 1.4 million megawatt-hours. Find the average yearly ...

Psychology

According to the all-or-none law: A. all axons in an area will fight at a given signal. B. an axon moves from its resting state with various degrees of stimulation. C. only sufficient electrical activity will cause the axon to fire. D. there is a gradual build up of electrical...

science

A researcher determined the amount of electrical energy entering a toaster and the amount of heat given off by the toaster. The amount of heat was less than the amount of electrical energy. How can this observation be explained?

psychology

The brain can be studied using: A. electrical, biochemical and magnetic means. B. radio frequencies, computers, and neurotransmission. C. neurotransmitting, electrical, and biochemical means D. biochemical, neurotransmitting, and magnetic means. I think its A, but not so sure ...

Physics

A modern computer central processing unit chip (CPU) runs with a clock speed of 2.7 GHz. It can execute one operation in each of these clock cycles. (a) how many seconds long is one clock cycle? (b) Electrical signals travel at the speed of light How far can an electrical ...

SCIENCE HELP!!??

Hi Please any one can help me in my science homework It is Imagine that you were driving in a car and it was raining, what would be the froces acting around the car and what would the electrical charges bee around the car, on the base and in the sky. I will be happy to ...

Psychology

A physiological support of hypnosis as a different state of consciousness is: (Points: 5) rapid eye movement initiated when a person is hypnotized. a change in the electrical activity of the brain in hypnosis. the sense of time removed. reaction time slows down. I believe it ...

Psychology

A physiological support of hypnosis as a different state of consciousness is: (Points: 5) rapid eye movement initiated when a person is hypnotized. a change in the electrical activity of the brain in hypnosis. the sense of time removed. reaction time slows down. I believe it ...

Math ( Surveying )

Need help with this problem! Thanks in advance. The ground clearance of an overhead electrical cable must be determined. Surveyor B is positioned directly under the cable (surveyor B can make a position check by sighting past the string of a plumb bob, held in his or her ...

science-chem

if i am given 2 pairs of aqueous solutions and I need to know which one has lower electrical conductivity? Are my answers correct? Ex/1M magneisium bromide and 1M lithium bromide.....Litium Bro. has lower electrical conductivity Ex? 1M Potassium phosphate or 1 M potassium ...

STATISTICS

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its mean and standard ...

Psychology

The means of travel within and between neurons is different becuase: a. eletrial signals move impulses within the neuron, while chemical signals move the impulses between neurons. b. chemical signals move the impulses within the neuron, while electrical signals move impulses ...

Elementary Statistics help

It is generally believed that electrical problems affect about 14% of new cars. An automobile mechanic conducts diagnostic tests on 128 new cars on the lot. a. Describe the sampling distribution for sample proportion by naming the model and telling its mean and standard ...

Electrical versus Gravitational Forces (Physics)

Multiple Choice help: * _____ forces between charges are enormous in comparison to ______ forces. * A. electrical, gravitational (possible?) B. gravitational, electrical (possible?) C. positive, negative (wrong, I think) D. negative, positive (wrong, I think) According to the ...

Psychology

According to the all-or-none law: a. all axons in an area will fight at a given signal. b. an axon moves from its resting state with various degrees of stimulation. c. only sufficient electrical activity will cause the axon to fire. d. there is a gradual buildup of electrical ...

physics

A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (A) (b) Find the energy delivered to the motor by electrical transmission in 2....

physics

A)When the energy input to gas fired power station is 1000MJ,the electrical energy output is 300MJ.What is the efficiency of the power station in changing the energy in gas into electrical energy b)what form does the 700MJ of lost energy take c)what is the fate of the lost energy

Biology

Which one of the following statements about sense receptors is true? A)Chemicals, light and pressure convert stimuli into electrical implses. B) Electrical impulses within the nerve pathways trigger an awareness of stimuli in the sensory receptors C)Sensory receptors are ...

physics

A 120-V motor has mechanical power output of 3.20 hp. It is 81.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. Answer: 24.6A (b) Find the energy delivered to the motor by electrical ...

physics

A power plant burns coal and generates an average of 600.0 Megawatts (MW) of electrical power while discharging 900.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. Coals vary a lot in their energy content. The energy released by...

physics

a. A power plant burns coal and generates an average of 610.0 Megawatts (MW) of electrical power while discharging 915.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. b. Coals vary a lot in their energy content. The energy ...

Physics -- check answers please

1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical energy (c) thermal energy --> ...

Biology

Which onf of the following statments about sense resceptors is trus? A) Chemicals, light and pressure convert stimuli into electrical impluses. B) Electrical impluses within the nerve pathways trigger an awareness of stimuli in the sensory receptors. c) Sensory receptors are ...

Math

How many liters of oil are required to supply the electrical energy needs of an average home for a month? Energy released by burning 1 liter of oil= 1.2 x 10(7th power) Electrical energy used in an average home daily 5 X 10 (7th power) I got 125 liters. Is that correct?

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