8 articles trouvés pour ce sujet.
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A piecewise graph |
2014-05-10 |
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Zoe pose la question :
Lightning Energy charges residential users for each unit of electrical energy bought from them each quarter, according to the scale below:
0-500 units cost 17 cents per unit
500-1500 units cost $85 plus 10 cents for each unit in the excess of 500
1500 or more units cost $185 plus 9 cents for each unit in excess of 1500
Sketch a graph showing the charge C as a function of U for up to 2000 electricity units
Penny Nom lui répond. |
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Energy in calories |
2009-12-15 |
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Josephine pose la question :
A soft drink manufacturer claims that a new diet soft drink is now "low Joule". The label indicates that the available energy per serving is 6300 J. What is the equivalent of this energy in calories? (1 Calorie=1000 cal)
Robert Dawson lui répond. |
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e = m c^2 |
2009-12-09 |
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Jim pose la question :
Please explain the following formula:
E=MC2 (squared)
Robert Dawson lui répond. |
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Electrical energy |
2008-12-09 |
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ROHAN pose la question :
A lamp consumes 1000J of electrical energy in 10s. what is its power
Stephen La Rocque lui répond. |
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A falling block |
2008-10-18 |
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KOBINA pose la question :
A 50 kg block being held at rest 20m above the ground is released. the block falls (no friction). how fast is the block traveling (in m/sec) when it has lost 40% of its original potential energy.
Stephen La Rocque lui répond. |
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Braking Distance Relationship |
2008-07-23 |
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Mr.Adjetey pose la question :
you are travelling at 30km/h.According to the rule of thumb,the braking distance is 9 metres when braking normally.How long is the braking distance under the same conditions when travelling at 60km/h?
Janice Cotcher lui répond. |
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Rotational energy needs |
2007-08-29 |
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will pose la question :
how much energy in KW do i need to start and subsequently rotate a 4 ton fly wheel of 1 metre radius at 12 rpm?
Stephen La Rocque lui répond. |
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Physics/Temperature Change |
2007-04-22 |
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William pose la question :
A 3.00 x 10^-3 kg lead bullet travels at a speed of 2.40 x 10^2 m/s and hits a wooden post. If half the heat energy generated remains with the bullet, what is the increase in temperature of the embedded bullet? (specific heat of lead = 1.28 x 10^2 J/kg)
Stephen La Rocque lui répond. |
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