Number of results: 15,761
Suppose a bar 1 m long expands .5 cm when heated. By how much will a bar 100 m long of the same material expand when similarly heated? If each one meter expands a half centimeter, then one hundred meters will expand 100*.5cm. Think on that. NO I DONT UNDRERSTAND WHAT THAT MENS...
Friday, June 17, 2005 at 3:14pm by Jarrad Schomaker
Without energy we can't do work cuz we can't apply ne force on an object. Gravity, itself a force, when, say, pulls a ball down to the gorund it actually does work. Now for tht force, where does it get the energy from or what type of energy does it have? If u have a book ...
Monday, June 20, 2005 at 10:14am by Mike
CONSERVING HOME ENERGY
READ EACH OF THE STATEMENTS BELOW. THEN, IN ONE OR TWO WORDS, WRITE WHAT YOU COULD DO TO CONSERVE ENERGY FOR THAT PARTICULAR ITEM. 1. A DRIPPING FAUCET 2. AN OPEN WINDOW WITH HEAT ON 3. DRAFT AROUND A CLOSED DOOR 4. THROWING OUT PLASTIC CONTAINERS 5. LIGHTS LEFT ON 6. ...
Wednesday, September 20, 2006 at 6:17pm by PEACHES
the big idea of energy KS3
what is the big idea of energy? To A. Einstein, it was that Energy and Mass are equivalent, and that the sum total of both, with a factor called entropy, is constant in the universe. what is the big idea of energy i need help on finding out what the big idea of energy is? ...
Sunday, October 22, 2006 at 3:29pm by blue babe
The wound spring of a clock would possess the same potential as kinetic energy. I am I correct in that statement. No. The wound spring has PE. Now what is this writing of KE? What is moving? how is it connected or related to the wound spring?
Sunday, November 5, 2006 at 12:40pm by tatiana
Question Details Three masses m1= 5.0 kg ; m2= 10.0 kg ; m1= 15.0 kg are attached by a strings over frictionless pulleys. The horizontal surface exerts a force of friction of 30N on m2. If the system is released from rest, use energy concepts to find the speed of m2 after it ...
Sunday, November 19, 2006 at 1:40pm by Harry
HI well i have two questions 1) a 2.0-m-long pendulum is released from rest when the support string is at an angle of 25 with the vertical. what is the speed of the bob at the bottom of the swing? 2)A 2.0*10^3-kg car starts from rest at the top of a 5.0-m-driveway that is ...
Monday, November 27, 2006 at 8:57pm by becky
the big idea of energy
i have to do an assesment about sound. i have to include the big idea of energy. i have no clue what it is! HHEELLPP MMEE!! What do you mean when you say "the big idea of energy"? I know that sound is created by vibrations, but I'm not sure thats exactly what you are looking ...
Tuesday, December 5, 2006 at 2:18pm by Anon
174520 = (massboiled) (2260) .1716 = massboiled so .1716? Suppose a burner transfers 325 kJ of energy to 450 kg of liquid water at 20 C degrees. What mass of the water would be boiled away? The first energy going in heats the water: energy=mass*c*(100-20) Then subtract that ...
Sunday, December 17, 2006 at 3:17am by Min
Potential Energy Q
Q A rollercoaster of mass 400 kg is stationary at the highest point on the track. It then drops to the lowest point through a vertical distance of 24 m. Calculate: a) the potential energy of the car at the top of the ride. b) the speed of the car at its lowest point, ignoring ...
Sunday, January 21, 2007 at 3:27am by Jim (BIGEYE)
I am working on a project on energy and I can not find a definition of muscular energy. I am in the 4th grade. Can you help? i need the ans htht
Sunday, February 18, 2007 at 1:21pm by Jen
chemistry:energy level of element
each element has a different has a different set of energy level use this fact to explain why colour of light emited by an element in gaseous state is the characteristics of the element The light emitted is characteristic of a specific set of allowed quantum levels, each ...
Friday, February 23, 2007 at 1:50pm by bonita
Does respiration release more energy from 1 gram of fat than from 2 grams of glucose?
Tuesday, February 27, 2007 at 6:08pm by Nadia
Gas Laws and Energy
I have another question. I've tried it and i keep getting it wrong. The average kinetic energy of a 1.85-g sample of argon gas in a 3.00-L bulb is 1.28e-22 J/atom. What is the pressure of the gas? What is the root mean square velocity of the argon atoms under these conditions...
Friday, March 2, 2007 at 10:40am by Jay
when you apply the brakes of a car its kinetic energy or energy of motion decreases. a)to what form of energy is the kinetic energy converted? b)where does the resulting energy end up? Do the brake drums on the wheels heat up? so does it convert into heat energy?and the ...
Tuesday, May 8, 2007 at 4:32am by Emma
some people refer to heat as "low grade energy. a)how is low grade energy different from high grade energy? b)give two example of high grade energy When heating a cup of tea, which would be preferable...a stove with a burner on top, or a heating pad? High grade energy is ...
Tuesday, May 8, 2007 at 4:41am by Emma
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 day. the coal it uses ...
Wednesday, May 9, 2007 at 6:57am by Emma
Physics Work and Energy, Momentum
Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is to escape from the ...
Sunday, May 13, 2007 at 4:35pm by Kelly
the big idea of energy
energy cant be created or destroyed it just passes from 1 thing 2 the other i feel like such a nerd
Tuesday, December 5, 2006 at 2:18pm by me
Science (big idea of energy)
What is the big idea of energy????? It says : for level 6: "Explained the reaction using the big idea of energy" what does it mean by the big idea of energy????
Monday, October 1, 2007 at 11:36am by person