Answer:
The exports of San Juan, Puerto Rico are chemicals, electronics, clothing, canned tuna, rum, beverages, and the last one is medical equipment.
The imports are Gasoline, other fuels, Passenger vehicles, Medical instruments, and Sulfonamides
Answer:
It would improve the player’s game.
Explanation:
It appears that motor imagery (MI) contributes to the enhancement of motor performance in athletes. Evidence suggests that directing the athlete's attention to the effects of movement on the environment is better than focusing on the action per se. In this case, the game of a tennis player is improved due to the fact that the player focuses on mental imagery.
Answer:
The collision occurs at a height of 1/3 of the total height of cliff.
Explanation:
The situation is represented in the attached figure:
For the stone dropped from top of cliff we have
Initial velocity of drop= 0 m/s.
Now the time at which it attains a velocity of 2v is obtained from first equation of kinematics as
Thus the distance it covers in this time can be calculated using third equation of kinematics as
For the stone thrown upwards the velocity at collision is give as 'v' thus the velocity at which it is thrown upwards can be calculated by first equation of kinematics as
The height over which it changes it's velocity from '3v' to 'v' can be again obtained from third equation of kinematics as
Thus the collision occurs at at a fraction of 1/3 of height.
A good example of a secondary source document useful in the study of history would be a textbook, because it provides basic information even though it wasn't an actual document from the historical time period.