Work Energy Part 2
... Again you want to raise the same 20 kg
bucket. It is starting from rest, and you want
to pull on the bucket so that is has a velocity
of 2 m/s. You want to accomplish this over a
time interval of 4 seconds.
Use Power and the work energy theorem.
(net work equals change in kinetic energy.)
Lesson - nstacommunities.org
... of a spring to a ring stand and marks the position of its lower end. The students then tie the
mass onto the lower end and mark its equilibrium position. The spring constant is obtained
by solving the equation mg = kx, where m is the mass of the suspended mass, g is the
acceleration due to gravity, ...
Physics Unit 2 Energy Fact Sheet
... 8. What is a renewable energy resource?
9. List 3 general uses of energy sources
10.List reasons why science doesn’t have the power to
deal with the environmental problems of using
Work, Power, and Energy Webquest
... 6. An escalator is used to move 20 passengers every minute from the first floor of a
department store to the second. The second floor is located 5-meters above the
first floor. The average passenger's mass is 60 kg. Determine the power
requirement of the escalator in order to move this number of pas ...
Energy is the potential to do work. Work is the ability to displace an
... Solar power (PV) has a very low power density. If 10% of the
electricity generated in the US were to be produced by large PV
plants, the area required would be about 5,500 km 2.
Wind power has a power density that is lower than solar. If 10% of
the US electricity generated were to be produced by lar ...
... 14. If the dad lifted the child in half the time, how would the new power compare to the original?
What about if he lifted the child in twice the amount of time? (Hint: say if the power increases or
decreases and also by how much!)
... • Power is often measured in joules per second. The
unit of measurement for power is the watt (W).
One watt is equal to one joule of energy
transferred in one second.
Plasma Displays - ABES Engineering College
... functions that can make it a must-have gadget for anyone.
• It has an „artificial intelligence‟ that can read the user‟s moods. It can tell
when the user is relaxed or stressed out.
• It can also monitor one‟s health and diet.
• It can make suggestions on where to go for a fun night in town.
• It ca ...
... Time (in seconds)
... energy in dollars does it take to move the elevator and its load up 32 floors? Assume
that one floor equals 3.50 meters.
(Calculate the work done in joules and then convert to kilowatthrs.)
Week 3 CCA Review
... temperature will increase and the hot chocolate’s temperature will decrease as the hot
chocolate transfers some of its heat to the spoon.
14.Heat energy can be transferred from one substance to another in three ways:
Conduction, Convection, and Radiation.
15.Conduction is heat transfer from one subs ...
Unit 9 Study Guide - Hewlett
... 7. Law of Conservation of Energy.
8. How is power influenced by time?
9. Describe an instance where you can put a force on an object, but no
work is done.
Community Choice Aggregation
Community Choice Aggregation, abbreviated CCA, is a system (neither a company nor an organization) adopted into law in the states of Massachusetts, New York, Ohio, California, New Jersey, Rhode Island, and Illinois which allows cities and counties to aggregate the buying power of individual customers within a defined jurisdiction in order to secure alternative energy supply contracts on a community-wide basis, but allowing consumers not wishing to participate to opt out. Also known as ""Municipal Aggregation,"" ""Governmental Aggregation,"" Electricity Aggregation,"" and ""Community Aggregation,"" CCAs now serve nearly five percent of Americans in over 1300 municipalities as of 2014. CCA's are de facto public utilities of a new form that aggregate regional energy demand and negotiate with competitive suppliers and developers, rather than the traditional utility business model based on monopolizing energy supply.