Answer:
At different times
Explanation:
The echo returns at different times, but faster in water. This is because water particles are bound closer and this makes them transmit vibration energy from one particle to the next quickly. An echo is a sound wave and sound waves are longitudinal waves that occur by the collision of particles to move the vibrations along, and this is why they move slower in air.
Answer:
Martin and Toshio differs in<u> level of optimisim.</u>
Explanation:
<em>Optimisim is the state whereby an individual feels the urge of success or succeeding in any given endeavor to be embarked on irrespective of whether the person has an experience in that field or not. </em>This mental state of mind differs from one individual to another and could be caused to manifest on an individual based on different factors.
Martin has a very high level of optimisim leading to him having a positive view on the physics class even though he has a weak background in science field while his friend, Toshio has a very low optimisim level, hence his pessimistic view on the idea by his friend.
Answer:
This study was an experiment.
Explanation:
An experiment demonstrated to compare the behavior of the two groups, the one who watched the violent film and the the one who did not. the research was made to figure out the impact of violence in human development.
Answer:
A
Explanation: They gained the land that used to belong to Mexico, like Tx, Ca, etc.
