The sun radiates energy at the rate of 6.5 x 10 to the power of 7 w/m squared.Assuming that the sun radiates as a black body(which approximate true), find its surface temperature
46,365 results
chemistry
A 100watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second? okay so i do:

Science
This are all the answers for Potential Energy of a System Quick Check for Connexus students. Q1: Use the picture to answer the question. The girl in the picture is at the highest point in swinging and starts to come down. Which statement could describe the

science
1.Is the following statement true or false?Solar panels collect energy from the sun that can then power a lamp in a home. A.True B.False 2.Harvesting energy from water,wind,and geothermal vents requries the use of A. aquaculture B.engines C.mines

science(check answers)
1.A 2.A 3.D 4.C 1.Is the following statement true or false?Solar panels collect energy from the sun that can then power a lamp in a home. A.True B.False 2.Harvesting energy from water,wind,and geothermal vents requries the use of A. aquaculture B.engines

Physics
Which statements about traveling waves are TRUE? Choose all that apply. a) A traveling wave transfers energy from one point to another. b) A speaker that beams its sound forward into a small area produces a louder sound. c) The rate at which a wave

physics
The sun radiates like a perfect blackbody with an emissivity of exactly 1. (a) Calculate the surface temperature(K) of the sun, given it is a sphere with a 7.00 multiplied by 108 m radius that radiates 3.80 multiplied by 1026 W into 3 K space. (b) How much

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

Science, plz,plz help
Which of the following illustrates the energy changes taking place during photosynthesis? light energy from sun ¨ chemical energy in bonds of glucose chemical energy in bonds of glucose ¨ light energy from sun light energy from sun ¨ chemical

science need help now!!
Which phases a good description of kinetic energy? Energy of motion Stored energy Conserved energy Energy from the sun This is the first question of 12 in energy of motion unit test does anyone know the awnsers to this

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used

Science
"Most of the solar radiation is absorbed by the atmosphere and much of what reaches the earth's surface is radiated back into the atmosphere to become heat energy." What can you conclude about heat energy? Most of the sun's energy is used to make heat

Environmental Science
Nuclear fission ____ atoms to create energy A. Heats B. Corrodes C. Splits D. Combines A machine that converts electrical energy into mechanical energy is called a _____ A. Generator B. Solar Panel C. Windmill D. Motor Nuclear power plants use the

sciencephysics
Q1)which of these energy resources does not originate from the suns energy?:natural gas,oil,geothermal energy,coal Q2)the burning of fossil fuels does not release? potential energy,light energy,sound energy , heat energy?? Q3)at the moment renewable energy

Physics
The Kelvin temperature of an object is T1 and the object radiates a certain amount of energy per second. The Kelvin temperature of the object is then increased to T2, and the object radiates 81 times as much energy per second as it radiated at the lower

physics
The power output in the sun is about 4.00 x 10^26W. (a). Calculate the power per unit area (intensity), in kilowatts per square meter, reaching Earth's upper atmosphere from the sun. The radius of the Earth's orbit is 1.5 x 10^11m.

physics
The sun is 1.5 1011 m from the earth. (a) Over what surface area is solar radiation spread at this distance? (b) What is the total power radiated by the sun? (The sun delivers energy to the surface of the earth at a rate of approximately 1400 W/m2.) (c)

Physics
A copper ball 2 cm in radius is heated in a furnace to 400 degree celsius. if its emissivity is 0.3, at what rate does it radiates?

Physics
Approximately 4 x 10^9 kg of matter is converted into enery in the sun per second. Express the power output of the sun in watts.

Chemistry
A 100watt lightbulb radiates energy at a rate of 100 J/s (The watt, a unit of power, or energy over time, is defined as 1 J/s). If all of the light emitted has a wavelength of 500nm, how many photons are emitted per second? (Assume three significant

Science
Which of the following is a problem with using solar power as a main source of energy? A. People do not yet have the technology to use solar power*** B. The sun is not close enough to provide solar energy C. Power from solar energy contains a large amount

science
Breanna and Kevin learned that fossil fuels, such as coal and oil, release energy when they are burned. Breanna believes this energy comes from the ancient plants and animals that formed fossil fuels, but Kevin says the power in fossil fuels comes from the

physics
the rate at which radiant energy from the sun reaches the earth's upper atmosphere is about 1.50kW/m2. the distance from the earth to the sun is 1.50*10^11m, and the radius of the sun is 6.96 * 10^8m. if the sun radiates as an ideal black body (e=1), what

Food Chain
Which diagram shows how energy flows through a food chain? A. Producer,carnivore,herbivore B. Sun,producers,herbivore,carnivore C. Sun,herbivore,carnivore,producers D. Carnivore,producers,herbivore I'm only in 5th grade, please make it easy to understand.

physics
the energy received by the earth from the sun is 1400w/m2. Assuming that the sun is a black body radiator and the ratio of the radius of the earth's orbit to the sun's radius is 216. Calculate the surface temperature of the sun. Stefan constant =

Physics
The average power output of a human heart is 1.3 3 Watts. You had to pay for this energy at Wis consin Energy’s rate of $0.12061 per kWh (kiloWatt hour), what is the cost?

Physics
The sun radiates like a perfect blackbody with an emissivity of exactly 1. (a) Calculate the surface temperature(K) of the sun, given it is a sphere with a 7.00 multiplied by 108 m radius that radiates 3.80 multiplied by 1026 W into 3 K space. (b) How much

Physics
The sun radiates energy at the rate of 3.8x10^26 W from its 5500°C surface into the empty dark space (fraction of radiation to earth and other planets is negligible).The effective temperature of deep space is 270°C. a. What is the increase in entropy in

Physics
Approximately 4x10^9 kg of matter is converted into energy in the sun per second. Express the power output of the sun in watts.

Science
Is the following statement true or false? Solar panels collect energy from the sun that can then power a lamp in a home.

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used

physics  please help
Assume the earth is a uniform sphere and that its path around the sun is curcular. Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the US in one year is about 9.33 x 10^9

physics
A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 106 kg/s, what is the rise in temperature of the flowing water? °C

physics
a large nuclear power plant generates electric energy at the rate of 1000 MW. how many joules of electricity does the plant generate in one day? what is the mass of this much energy?

physics
The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?

physics
The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?

physics
The Sun radiates about 4 × 1026 J of energy into space each second. How much mass is released as radiation each second? The speed of light is 3 × 108 m/s. Answer in units of kg

astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity.

Integrated Science
The sun converts matter to radiant energy at a rate of 1.4 x 10 to the 17th power kg per year, how much matter is converted into energy every second?

metreology
Wien’s radiation law says that the wavelength of most intense radiation (λmax) emitted by a blackbody is inversely proportional to the absolute temperature (T) of the object. The surface of the Sun radiates as a blackbodyat a temperature ofT=6000

Physics
When its engine of power 75.0 kW is generating full power, a small singleengine airplane with mass 700 kg gains altitude at a rate of 2.60 m/s . A)What fraction of the engine power is being used to make the airplane climb? (The remainder is used to

science
Where does energy come from? Energy can come from the complete destruction of matter (as in nuclear reactions), or the rearrangement of electrons or other charged particles inside matter (as in chemical reactions) or from electromagetic fields (as in light

science
How do i calculate how much time it takes to heat water? All I know is the power supplied and the energy required. Thanks power= energy/time Power*time= energy you know the energy, you know the power, solve for time. time(in seconds)=

science
Why does the Earth get more energy from the Sun compared to any other star? •The Sun is much closer to Earth. The next closest star is 4.2 light years away. **** • The Sun is much denser than other stars. That means it produces more energy. • The Sun

Physics pls anyone can help me? its urgent
When the sun is in the zenith and the sky is perfectly clear, the solar power we receive on the surface of the earth is roughly 1 kW per square meter (on a horizontal surface that is normal to the direction of the sun). Calculate the average solar power

Algebra II
The problem states: Saturn is approximately 1.4x 10 to the 9th power kilometers from the Sun. If light travels at approx. 3.0 x 10 to the 5th power kilometers per second, how long does it take light from the Sun to reach Saturn? Express your answer in

Physics
The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average distance between the earth and the sun is 1.50E11 m. What is the average power emitted by the Sun? Ok so intensity is power over

PHYSICS NEED HELP FAST
A power plant has a power output of 1055 MW and operates with an efficiency of 33.0 percent. Excess energy is carried away as heat from the plant to a nearby river that has a flow rate of 1.1 x 10^6 kg/s. How much energy is transferred as heat to the river

physics
At a certain location, the solar power per unit area reaching Earth's surface is 200 W/m^2, averaged over a 24hour day.If the average power requirement in your home is 2.8 kW and you can convert solar power to electric power with 8.0 % efficiency, how

Physics
The sun radiates energy at the rate of 6.5 x 10 to the power of 7 w/m squared.Assuming that the sun radiates as a black body(which approximate true), find its surface temperature.

physics
he sun radiates like a perfect blackbody with an emissivity of exactly 1. (a) Calculate the surface temperature of the sun, given it is a sphere with a 7.00 ✕ 108 m radius that radiates 3.80 ✕ 1026 W into 3 K space. K (b) How much power does the sun

earth science
state how the sun generates the energy that it radiates away as its luminosity.

Physics
Assuming there is no conduction or convection operating, a cold object in a warm room: A.Radiates more energy than it absorbs B.Absorbs more energy than it radiates C.Only absorbs energy; it does not radiate because it is colder than its environment.

help
Estimate the power you deliver when starting to walk from a standstill, in W: & Your body radiates about 88 W in heat energy. How much energy, in J, is radiated in one hour?

Physics
The temperature of the Sun’s surface (the socalled photosphere) is about 5500 C. Assume that the Sun’s surface is pretty close to a perfect blackbody emitter. (a) At what wavelength does the peak intensity of Sun’s radiation lie? (b) Estimate the

Physics (please help!!)
The Crab pulsar (m=2.00x10^30 kg) is a neutron star located in the Crab Nebula. The rotation rate of the Crab pulsar is currently about 30.0 rotations per second, or 60.0pi rad/s. The rotation rate of the pulsar, however, is decreasing; each year, the

astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity.

(One more science Question)
This Is the last one I'm stuck on, I promise, I'm caught between c and d, I think... C right? Because Even If solar power Isn't available at night, Or when It's cloudy, there are ways of storing the energy you get, Right? Which of the following is a

astronomy
Arcturus is about half as hot as the Sun but is about 100 times more luminous. What is its radius campared to the sun. If Arcturus is half as hot, it radiates (1/2)^4 = 1/16 as much as the sun PER UNIT AREA. But since it radiates 100 times more totally, it

physics
I keep getting the wrong answer... A solar model is used to calculate the expected temperature and density at all depths within the Sun. These results are then used to calculate the expected fusion rate within the Sun. We have confidence that the model is

physics
A radio station on the surface of the earth radiates an EMwave with an average total power of 50 kilowatts. Assuming the transmitter radiates equally in all directions (not in real life), find the amplitudes Emax and Bmax detected by a satellite at a

Chemistry
You leave 255 grams of water outside at 21.0 C in the sun. After 30.0 minutes the temperature is 35.0 C. A) how many calories of energy was used by the sun to heat the water up? B) how many joules of energy is this? C) How many Joules / second of power did

physics
If a person radiates about 74 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 235 Calorie doughnut?

physicssun
a 1 square meter solar panel receives a total of 1000Watts from the sun. If we assume all the energy is release through nuclear fusion from the sun what is the total output from the sun?Given you know the total mass of the sun and have just calculated the

science
The total power output of the Sun is about 3.8 × 1026 W, and the powerproducing core has a radius of about 1.4 × 105 km (about 20% of the full radius of the Sun). Using these figures and your knowledge of the energy release in the proton– proton chain

Physics
15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.00230 W/m2. What is the rate at which the source is emitting sound energy?

physics
15.0 meters from a sound source that radiates freely in all directions, the intensity is 0.000550 W/m2. What is the rate at which the source is emitting sound energy? answer in Watts.

physic
At which point between earth and sun, the intensity of the gravity field of the earth and sun are equal, if the mass of Earth is 6 x 10 to power 24 kg, the mass of the sun is 2 x 10 to power 30 kg while the distance between them is 15 x 10 to power 7 km?

college easy physics
Help me out with 2 multiple questions!!!!!!!!!!!!!!!!! ASAP please What is flux in general? 1. A flow of energy, so heat is an example of flux. 2. Flowing matter such as a river or an air current. 3. Flowing energy or flowing matter. 4. An amount of energy

Physics pls anyone can help me? its urgent
When the sun is in the zenith and the sky is perfectly clear, the solar power we receive on the surface of the earth is roughly 1 kW per square meter (on a horizontal surface that is normal to the direction of the sun). Calculate the average solar power

physics
Information: 1. According to the information on the EERE posting, 22% of the U.S. annual electrical energy consumption is for lighting. The amount of energy is 8.2 Quads, (1.0 Quad = 1015 BTU). This is in agreement with the information given in the

science
A box was lifted using a pulley. If 1,000 W were required, which of these correctly describes power and energy for this action? 500 J of energy were converted into some other energy every second and two times the power was required. 1,000 W of power were

Honors Biology  URGENT!!!
ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.

Honor Biology
ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.

Clean Energy
What are some types of clean enregy and what are they? I have geothermal  heat from the Earth, hydropower  water power, wind power, biomass (I don't know what that is), and solar power  sun power. I would really like some help.

Physics
What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

Physics
What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

chemistry  PLEASE HELP
Spectroscopic studies have shown that the fusion reaction in the sun's core proceeds by a complicated mechanism. One proposed overall equation for the solar fusion reaction is 411H+2 0−1e→42He which is also accompanied by the release of "massless"

math
Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice

Astronomy
Consider the same asteroid initially in the asteroid belt at a distance 3 AU from the Sun, and 2 AU from Earth, which collides with Earth. As it falls towards Earth, it acquires kinetic energy (neglect its initial motion) both by being accelerated towards

physics
A 250. MW coalfired power plant burns fuel with an energy density of 35.0 MJ kg1. Water enters the temp reduction tower at 293 K and leaves at 350. K at a rate of 4200. kg s1. 4. Calculate the energy removed by the water each second. 5. Calculate the

physics
A 250. MW coalfired power plant burns fuel with an energy density of 35.0 MJ kg1. Water enters the temp reduction tower at 293 K and leaves at 350. K at a rate of 4200. kg s1. 4. Calculate the energy removed by the water each second. 5. Calculate the

engineering
In an electric car, regenerative braking is used to recharge batteries. The principle of regenerative braking involves converting the kinetic energy of the vehicle into energy stored in a battery. If a car is traveling at a speed of 30 km/h and is stopped

Math
All planets revolve around the sun in elliptical orbits. Uranus's furthest distance from the sun is approximately 3.005 times 10 to the ninth power km, and it's closest distance is approximately 2.749 times 10 to the ninth power km. Using this information,

Science
The sun's energy is generated in its(1 point) core. corona. radiative zone. convection zone. I heard the suns energy comes from within the sun itself? Does that mean its A?

physicsenergy conservation
a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass of coal it burns each

physics
the solar energy arriving at the outer edge of earth's atmosphere from the sun has intensity of 1.4 kW/msquared. how much mass does the sun lose per day? what percent of the sun's mass is this?

PHYSICS
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used

Physics
Calculate the kinetic energy that the earth has because of (a) its rotation about its own axis and (b) its motion around the sun. Assume that the earth is a uniform sphere and that its path around the sun is circular. For comparison, the total energy used

Physics
#1.) A wind turbine has a Cp of 0.42 and extracts 50 kW of power when the wind velocity is 25 m/sec. How long are the blades? (ρ = 1.2 kg/m3) #2.) An electric hot water heater is used to heat 30 gallons of water from 20 °C to 45 °C. a. What heat energy

Physics
Assume that the earth is a uniform sphere and that its path around the sun is circular. a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is

physics
Assume that the earth is a uniform sphere and that its path around the sun is circular. (a) Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year

Fossil Fuels
If we ran out of fuels which could we use to almost replace them. Hydroelectric Wind Solar GeoThermal You have asked this question more than once today and received answers that probably none of them could replace the fuel we use today. And you don't

Please Help!
If we ran out of fuels which could we use to almost replace them. Hydroelectric Wind Solar GeoThermal DUE 2MORROW! duplicate post. Although they could all help, Solar and Wind are the most promising. I suppose I'd choose solar, but that's pretty far

physics
In 2003, New Zealand households consumed a total of 153.6E+15 J of energy (the largest amount of any sector in the New Zealand economy). How many days would it take for the sun to put that amount of energy onto a region 20.0 km by 20.0 km (0.15 percent of

physics
At a certain location, the solar power per unit area reaching Earth's surface is 200 W/m^2, averaged over a 24hour day.If the average power requirement in your home is 2.8 kW and you can convert solar power to electric power with 8.0 % efficiency, how

Physics
A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 x 10^6 kg/s, what is the rise in temperature of the flowing water?

Physics
A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise in temperature of the

Physics
A nuclear power plant has an electrical power output of 1200 MW and operates with an efficiency of 31%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 multiplied by 10^6 kg/s, what is the rise in temperature of the

Engineering
Consider a dieselfired steam power plant that produces 400 MW of electric power. The turbine inlet conditions of 5 MPa and 500°C and a condenser pressure of 25 kPa. The state of the water at the inlet of the pump is saturated liquid. The steam has