Answer:
500J
Explanation:
The arrow will have an energy of 500J after it has been released from its state of rest.
This is compliance with the law of conservation of energy which states that "in every system, energy is neither created nor destroyed but transformed from one form to another".
- The energy at rest which is the potential energy is 500J
- This energy will be converted to kinetic energy in total after the arrow has been released.
- This way, no energy is lost and we can account for the energy transformations occurring.
Answer:
Explanation:
Given
Person travel 180 km with
and slow down to due to rain
time taken to cover 180 km is
total time
suppose is the time for which it travels with
so distance travel during this time
total distance
(b)Average speed
Doppler radar is dependent on the radio waves that are reflected back by the water particles. The correct option among all the options that are given in the question is the last option. A Doppler radar is a specialized kind od radar that is used to calculate the distance of objects from a specific object. It emits radio waves and receives the incoming waves to calculate the distance.<span />