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UEW
Questions and answers by visitors named
UEW
Questions (5)
A ball of mass 1kg is dropped from a height of 7m and rebounds to a height of 4.5m. Calculate:
(I) its KE just before impact (II)
4 answers
1,122 views
A project demand for electricity is 25,000MW in a year. Estimate the following: The electricity is produced by a big
2 answers
629 views
State four of the transformation of energy which occurs at a power station which uses coal as its fuel. Account for the energy
1 answer
451 views
State the energy transformation which occurs when a boy shoots a stone from a catapult to hit a target.
4 answers
1,087 views
A fossil fuel electric-power plant consumes 9800 Btu to produce 1kWh of electrical energy. Calculate the conversion efficiency
1 answer
492 views
Answers (1)
A ball of mass 1kg is dropped from a height of 7m and rebounds to a height of 4.5m. Calculate: (I) its KE just before impact (II) its initial rebound velocity and KE (III) Account for the loss of KE on the impact.
