7 items are filed under this topic.
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Energy in calories |
2009-12-15 |
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From Josephine:
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)
Answered by Robert Dawson. |
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e = m c^2 |
2009-12-09 |
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From Jim:
Please explain the following formula:
E=MC2 (squared)
Answered by Robert Dawson. |
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Electrical energy |
2008-12-09 |
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From ROHAN:
A lamp consumes 1000J of electrical energy in 10s. what is its power
Answered by Stephen La Rocque. |
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A falling block |
2008-10-18 |
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From KOBINA:
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.
Answered by Stephen La Rocque. |
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Braking Distance Relationship |
2008-07-23 |
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From Mr.Adjetey:
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?
Answered by Janice Cotcher. |
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Rotational energy needs |
2007-08-29 |
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From will:
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?
Answered by Stephen La Rocque. |
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Physics/Temperature Change |
2007-04-22 |
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From William:
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)
Answered by Stephen La Rocque. |
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