A 4 watt night light is left on for 8 hours each night how much work does it do per night

Answers

Answer 1

Answer:
1 watt = 1 joule per second

   (4 joules/second) x (3600 second/hour) x (8 hour)

   = (4 x 3600 x 8) (joule)

   = 115,200 joules .

Related Questions

if the light completed the 71.0-km round trip in the time it took the mirror to complete one-eighth of a revolution, what is the speed of light?
Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.a.pitchc.scalesb.overtonesd.percussion
A weight is connected to a spring that is suspended vertically from the ceiling. If the weight is displaced downward from its equilibrium position and released, it will oscillate up and down.If air resistance is neglected, will the total mechanical energy of the system (weight plus Earth plus spring) be conserved?A. YesB. No
angie, brad, and carlos are discussing a physics problem in which two identical bullets are fired with equal speeds at equal-mass wood and steel blocks resting on a frictionless table. one bullet bounces off the steel block while the second becomes embedded in the wood block.
Can a simple machine’s efficiency ever be greater than 100%?Explain your answer.

How is sun related to nuclear, electromagnetic, and heat energy?

Answers

Answer;

The sun creates energy through nuclear fusion. Kinetic energy creates heat and light.

Explanation;

Solar energy from the sun is the primary source of energy on the surface of life that is important for sustaining life on earth.
Nuclear fusion occurring in the sun involves a nuclear reaction in which hydrogen nuclei fuse together to form helium nuclei and release energy.
Electromagnetic energy from the sun comes to Earth in the form of radiation. This energy travels through space at a speed equivalent to that of other electromagnetic radiations that is the speed of light.
The electromagnetic energy from nuclear fusion in the sun generates kinetic energy that in turn creates light and heat.

The nuclear energy is the source of energy production on the sun, then this travels to the Earth in the form of Electromagnetic radiation and as it heats up the other bodies in solar system, it gets converted into the heat energy.

Explanation:

The sun is considered to be the ultimate source of energy for the whole solar system. The energy produced in the sun reaches all the other planets in the solar system. The sunlight is a very big source of energy for the Earth also.

The energy produced on the sun is due to the nuclear reaction due to the immense pressure and temperature. This nuclear energy from the sun travels to the other bodies in the solar system by means of the electromagnetic radiations.

The electromagnetic radiations from the sun carry the heat energy to the bodies and as they reach the target, the target is heated up due to the conversion of the energy from the sun into the heat energy.

Thus, The nuclear energy is the source of energy production on the sun, then this travels to the Earth in the form of Electromagnetic radiation and as it heats up the other bodies in solar system, it gets converted into the heat energy.

Learn More:

1. Acceleration of the box under friction brainly.com/question/7031524

2. The kinetic energy of an object depends on the brainly.com/question/137098

3. The approximate time taken to walk for 2000 miles brainly.com/question/3785992

Answer Details:

Grade: High School

Subject: Physics

Chapter: Energy

Keywords:

sun, energy, nuclear, electromagnetic, heat, nuclear reaction, immense, pressure, temperature, source, solar system, planets.

Collect information about working of Geyser and prepare a report

Answers

A geyser is actually a devise that coverts electrical energy into heat energy for heating up water. The heating element that is inside the geyser actually gets heated up and then in turn it heats the water in contact with it within the geyser. There is also a thermostat device within the geyser that cuts off the heating when the water temperature reaches the desired level. This helps in stopping of electrical energy loss. One inlet brings in cold water while another outlet gets rid of the hot water. When the temperature of the water falls below the desired level the heating is again started by the thermostat.

A motor with a power of 7.0 × 104 watts lifts a loaded elevator to a height of 20.00 meters for 40 seconds. What is the force exerted by the motor on the elevator?

Answers

Answer:

$1.4\cdot 10^5 N$

Explanation:

First of all, we can find the work done as follows:

$W=Pt$

where P is the power and t is the time taken. In this problem, $P=7.0\cdot 10^4 W$ and $t=40 s$ , so the work done is

$W=Pt=(7.0\cdot 10^4 W)(40 s)=2.8\cdot 10^6 J$

The work done is equal to the force applied F times the displacement d:

$W=Fd$

since we know d=20.0 meters, we can re-arrange the equation to find the force exerted:

$F=(W)/(d)=(2.8\cdot 10^6 J)/(20.0 m)=1.4\cdot 10^5 N$

Answer:

C) 1.4 × 105 newtons

Explanation:

Correct answer on plato/edmentum

A series circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. If the generator supplies a voltage of 42 V, what is the magnitude of the current? A. 2 A B. 3 A C. 1.75 A D. 1.33 A

Answers

First you calculate the total resistance. Since the resistors are connected in series, the total equivalent resistance is:
Rtotal = R1 + R2 = 10 + 4 = 14 ohms

Now you calculate the electrical current with Ohm's law:
I = U/Rtotal = 42/14 = 3A

Correct answer: B. 3 A

Chanel has some cotton candy that came in a cloudy shape. She wants to make it more dense. Which describes the candy before and after Chanel manipulated it?

Answers

The candy before has undergone physical change after manipulation because it says that it will make the cotton candy denser. Making it denser probably doesn't have to change any chemical components of the candy.

A geologist finds a layer of rock that is coarse-grained granite.What type of rock did the geologist find?

A.extrusive igneous rock

B.intrusive igneous rock

C.foliated metamorphic rock

D.nonfoliated metamorphic rock

Answers

The right answer for the question that is being asked and shown above is that: "B.intrusive igneous rock." A geologist finds a layer of rock that is coarse-grained granite. The type of rock that the geologist find is an intrusive igneous rock.

Other Questions

What is capacitance?

What is the resistance of an object to moving or to stoppingA. GravityB. InertiaC. Gravitational Force

Explain why a battery causes charge to flow spontaneously when the battery is inserted in a circuit

Carbon and hydrogen are examples of pure substances or