The statement that best describes an external circuit is "<span>D. The flow of an alternating current switches direction when a generator's terminals change its charge." The main difference between direct and alternating current is the direction of flow. Direct current follows only one direction from negatve to positive, while alternating current changes direction periodically.</span>
The answer is A, transporting nutrients
<u>We are given:</u>
Weight on Earth = 300 N
Value of g on the planet = 4 ft/s²
<u>Converting to m/s: </u>
4 ft/s² * (1 m / 3.3 ft) = 13.2 m/s²
<u>Mass of the object:</u>
We know that:
Weight = Mass * g
<em>replacing the given values</em>
300 = Mass * 9.8 [g = 9.8 m/s²]
Mass = 300/9.8
Mass = 30.6 kg <em>(approx</em>
<u>Weight on the other Planet:</u>
Weight = Mass * g(on that planet)
Weight = 30.6 kg * 13.2 m/s²
Weight = 403.92 N
- At pole the gravitation is more than that of equator .
And according to newtons second law
Force=Mass×Acceleration
And
- Hence force varies directly with acceleration hence weight will be more .
Let us first calculate the average speed of David,
Av speed = Distance traveled/ Time taken
We have, distance = 70 miles
Time = hours = 1.75 hours
Av speed =
= 40 miles/hour
Another 120 miles will be traveled in time, t = 120/40 = 3 hours