Answer:
No, some energy will be dissipated energy due to work of air resistance.
Yes , the drawbridge will finish lowering 1 second before king arthur arrives
Answer: The correct order of energy transformation is from CHEMICAL ENERGY to ELECTRICAL ENERGY to LIGHT ENERGY
Explanation:
Energy which is simply defined as the ability to perform work is made up of different forms, these include:
- Mechanical energy: Associated with machines at work.
- LIGHT ENERGY: produced by light bulbs
- ELECTRICAL ENERGY: taking in by television set and other electrical appliances.
- CHEMICAL ENERGY: stores in food and other fuels
- Sound energy: Produced by vibrating objects example piano, drums.
According to the law of conservation of energy, energy can neither be created nor destroyed in a closed system, but can be transformed from one form to another, thereby keeping the energy in the closed system constant. From the question, the circuit is an example of a closed system and the order of energy transformation taking place is from the battery (CHEMICAL ENERGY) to ELECTRICAL ENERGY(power source) to LIGHT ENERGY(bulb). I hope this helps, thanks.
Answer:
0.929%
Explanation:
= mass of water evaporated
= mass of the lady
= specific heat of human body = 4200 JK⁻¹kg⁻¹
= Latent heat of evaporation of water = 2260000 Jkg⁻¹
= Drop in temperature = 5 C
Using conservation of heat