In the united states, deserts may be found on the east side of mountain ranges because:
(multiple choice, multiple answers)
winds from the east are dry
moist winds prevail from the west
the water vapor in the westerlies condenses as it rises over mountain ranges
winds originating from the west are usually dry

The answer is; the water vapor in the westerlies condenses as it rises over mountain ranges

When the westerlies pass over the warm pacific ocean, the winds carry with them the vapor from evaporation of the oceans. As the winds blow and encounter large mountain ranges, the winds are forced upwards where it's cooler and begin to cool. The moisture in the winds condenses and precipitates as rain. On the leeward side of the mountain the winds that dry is therefore low on moisture content hence bring little rain.

the higher the current the higher the mag field around it the higher the influence on the compass

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.