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If the person exerted an effort force of 250 newtons to roll the barrel along the ramp what is the efficiency of the ramp?
A 40 kg barrel gains a height of 5 meters, so the potential energy it gains is: Potential energy gained = m g h = mass x gravitational field strength x height = 40 kg x 10 N/kg x 5 m = 2000 J The work done in pushing it is given by: W = F d = force x distance moved in the direction of the line of force = 250 N x 10 m = 2500 J So out of 2500 Joules used, 2000 have been gained by the barrel as gravitational energy. So the efficiency is: Efficiency = useful energy / energy used up = 2000 / 2500 = 0.8, or 80%
Give 5 example of energy transformation?
refrigarator-electrical energy-light energy-heat energy
Name 5 forms of energy mention your book?
solar energy,nuclear energy,chemical energy,hydro energy,potential energy
Why not just use that energy consumed running the heat pump to run electric heaters inside the house and heat it directly that way?
Heat pump is more efficient. If you use electric heaters, 1 joule of electric energy will produce 1 joule of heat energy. If you use heat pumps, 1 joule of electric energy can pump several joules - perhaps up to 5 or 6, depending on the outside temperature, and the efficiency of the heat pump - of heat, from the outside to the inside.
7 stages of energy?
1.kinetic energy 2.potential energy 3.thermal energy 4.chemical energy 5.radiant (light) energy 6.electrical energy 7.nuclear energy
What is the efficiency formula?
Efficiency=Useful energy output divided by the energy input. i.e. 100 J is the energy input and you get 5 J light energy from a lamp, the waste energy would be 5 J.
How do you calculate cost efficiency?
say energy costs 5 cents and the efficiency is 0.1kwh cost= 0.1kwh x 0.05 cost= o.oo5cents
What are the release dates for Today's Homeowner with Danny Lipford - 1998 Everyday Energy Efficiency?
Today's Homeowner with Danny Lipford - 1998 Everyday Energy Efficiency was released on: USA: 5 November 2011
What are the release dates for Home Again with Bob Vila - 1990 Concrete Color Staining Soffits and Energy Efficiency?
Home Again with Bob Vila - 1990 Concrete Color Staining Soffits and Energy Efficiency was released on: USA: 5 November 2005
How are 5-star appliances energy efficient?
i don't know don't ask me
What the cvl lick?
what does the 5 point star mean
Can you list 5 examples of plasma?
fire, lightning, star, solar wind and energy
Does the Frigidaire FFC0522 5 CuFt Chest Freezer cost a lot to run?
The Frigidaire FFC0552 is extremely energy efficient and is rated to comply with all federal energy efficiency requirements.
What does a morning star rating of 5 stars mean?
best
How do you spell pentichell?
I wonder if you mean pentacle, which is a 5-pointed star.
What are the release dates for The Car Coach - 2011 What Does a 5-star Safety Rating Mean?
The Car Coach - 2011 What Does a 5-star Safety Rating Mean was released on: USA: 1 November 2012
What are 5 recommendation on how to address the environmental problem in the community?
There are 5 different recommendations on how to address the environmental problem in the community. You can address carbon tax, wind energy, food production, efficiency and education.
