Questions LLC
Login
or
Sign Up
Ask a New Question
Energy and Power
Page 2
Questions (142)
A 1.00 x 10^4 W electric motor is used to lift a 955 kg object vertically 25.0 m at a constant velocity in 45.0 s. What is the
2 answers
asked by
Allie
660 views
A rocket engine,
2.44 cross product 10−5 watts/cm2
1 answer
asked by
Anonymous
378 views
Consider a 250 Wp rated crystalline silicon PV module. It results from a manufacturing process that consumes 8kWh/Wp of PV
1 answer
asked by
Anonymous
469 views
(Q1)calculate the electric power which must be supplied to the filament of a light bulb operating at 3000k. the total surface
2 answers
asked by
kate
792 views
A popular brand of pressure washer claims to deliver 330 litres per hour of water at a pressure of 80 bar, drawing 1400 W of
2 answers
asked by
Fred
523 views
How much energy is stored in a 9V battery rated at 10 A hour?
1 answer
asked by
jake
355 views
How can I get powers?
3 answers
asked anonymously
18 views
Calculate the power required of a 1230 kg car as it climbs a 18° hill at a steady 92 km h-1. The total friction and air
1 answer
asked by
David Gia
390 views
How many photons of sunlight are striking a 1 square meter surface per second, if it is receiving 600 watts of power?
1 answer
asked by
mel
374 views
How Much Energy Would It Take To Destroy Earth?
3 answers
asked anonymously
21 views
a 12 V car battery is found to be capable of storing 2.0 kW*h of eletrical energy. for a certain eletric car, it is necessary to
2 answers
asked by
monee'
616 views
a 1 square meter solar panel receives a total of 1000Watts from the sun. If we assume all the energy is release through nuclear
2 answers
asked by
jen
535 views
I don't know why. Please help me.
Why did the reactors at the Fukushima plant overheat? Because of Nuclear power generation?
3 answers
asked by
Anonymous
432 views
I. Power can be increased by performing more work given the same amount of time.
II. Energy and Power can be both measured using
3 answers
asked anonymously
85 views
This process requires an energy input from ——-to occur.
3 answers
asked by
Jo
17 views
To store the energy produced in 1.5 hour by a 160 MW (160 10^6 W) electric-power plant, how many cubic meters of water will have
1 answer
asked by
mike
415 views
Battery Power Problem. A certain type of thermal battery
for an airplane navigation device backup power has a mean life of 300
3 answers
asked by
Iris
464 views
A 62 kg hiker climbs to the top of a 3700 m-high mountain. The climb is made in 5.0 h starting at an elevation of 2600 m.
2 answers
asked by
peyton
1,155 views
a 200 L electric water heater uses 15 kW of electric power. If the herter is 90% efficient, how long does it take to heat the
2 answers
asked by
Bill
1,042 views
How are energy, work, and power related?
3 answers
asked by
Tyler
462 views
How long does it take a 60 watt motor to do 8500 J of work?
3 answers
asked by
Chris
404 views
what is kurnet of power
1 answer
asked by
jhenny rose
382 views
An explosion occurs that releases 2500J of energy in 110ms, 1.5% of which goes into a spherical sound wave traveling out equally
1 answer
asked by
manny
443 views
what does the sun have to do with technology ?
it many substances lik light helps people travel or u can go to google Converting
1 answer
asked by
kkadisha
510 views
Statements for item 6
I. Power can be increased by performing more work given the same amount of time. II. Energy and Power can
1 answer
asked anonymously
51 views
Water flows over a section of Niagara Falls at a rate of 1.2×106 kg/ s and falls 50m. How many 60W bulbs can be lit with this
3 answers
asked by
Anonymous
1,635 views
A microwave oven has a power requirement of 1250 W. A frozen dinner requires 6.5 min to heat on full power. If the cost of
3 answers
asked by
kim
1,524 views
Four rivers have the same volume of water flow over time but fall from different heights to power hydroelectric dams. Which dam
1 answer
asked anonymously
169 views
Which is the equation for a machine’s efficiency
1 answer
asked anonymously
12 views
a set of pulleys is used to lift a piano weighing 1,000 newtons. the piano is lifted 3 meters in 60 secounda. how much power is
2 answers
asked by
safiyyah
1,330 views
A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is
1 answer
asked by
Annette
1,290 views
The average intensity of sunlight at earth's surface is approximately 1400 W/m^2 , if the Sun is directly overhead. The average
2 answers
asked by
Raquel
1,296 views
The human brain consumes about 21.3 W of power under normal conditions. (More power may be required during exams...) How long
4 answers
asked by
Connie
1,282 views
Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0 V batteries of a 740
1 answer
asked by
Justin
1,202 views
Water drops over 49 m high Niagara Falls at the rate of 6.0 106 kg/s. If all the energy of the falling water could be harnessed
2 answers
asked by
Anonymous
1,130 views
EXPLAIN THE 3 SYSTEM WHICH ESKOM USES:
i) EMDAS ii) Phoenix iii) GPSS
1 answer
asked anonymously
31 views
What is this Article primarily about? A.Off-grid solar power is changing lives in remote areas of Africa by bringing electricity
1 answer
asked by
Jus-A-Viewer
36 views
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
1 answer
asked by
frank fred
1,128 views
An escalator in a department store is driven by a large electric motor whose power consumption changes with the load to keep the
2 answers
asked by
micky
1,121 views
A crane lifts a package of mass 121 kg. If the power output of the crane is 101 Watts, at what speed can the package be lifted,
2 answers
asked by
Sahar
1,080 views
Hello agein, a biger question this time.
Height difference H 180 meters Flow T 3000 tons / second Delivery 4.2 GW P a) How large
2 answers
asked by
Oddbjørn
1,079 views
Water flows over a section of a waterfall at the rate of 5.4 104 kg/s and falls 38 m. How much power is generated by the falling
5 answers
asked by
dale
1,043 views
Sewage at a certain pumping station is raised vertically by 5.57 m at the rate of 1 860 000 liters each day. The sewage, of
1 answer
asked by
Michelle
919 views
Discuss the work of Canadian scientist Jeff Dahn on lithium battery longevity and performance.
4 answers
asked by
goatmanthealien
36 views
how much energy is stored in a 9 volt battery rated at 10 a hour
2 answers
asked by
Susan
849 views
Using the following image and the information above, how does a Power Plant create electricity using a generator?
1 answer
asked by
THE ANSWER!!!
116 views
What is one of the major concerns with button batteries?
Options: a) they do not last for a long period of time b) they are easy
1 answer
asked by
🤖 Bot GPT 3.5
27 views
A 100 watts light bulb has an average life of 2000 hours. How much energy does it consume over its lifetime?
The only thing I got
3 answers
asked by
Salma
822 views
An elavater m=800kg has a maximum load of 8 people of 600kg. The elevatorgoes up to 10 stories = 30m at a costant speed of 4m/s.
3 answers
asked by
Noemi
772 views
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
2 answers
asked by
Easha
641 views
Pages
1
2
3
Parent Categories (11)
Electricity and Magnetism
Environment and Infrastructure
Fluid Mechanics
Forces and Motion
Mechanics
Mechanics/Forces
Physics
Physics/Electrical Engineering
Science and Physics
Science and Technology
Technology and Science