4- how far above the earth's surface, will the acceleration of gravity be half the value on earth's surface?

Gravity (Accel const) rises linearly from the center of a planet to its surface where all of its mass is acting on your mass.

After lift off from the surface, gravity then drops by the inverse square of the distance from the planet’s center.

The mass of the earth is about 6E24 kg and the earth radius (Re) is 6371 km which gives G= 9.8m/s/s as the acceleration constant at earth’s surface.

Above the earth by its radius again (2Re), gravity acceleration is a fourth of that at the surface g= Me*G/4 = (1/4) * 9.8m/s/s = 2.45m/s/s

Half the gravity (g= Me*R/2) happens at an altitude of sqrt(2) * Re above the surface: 1.414 * 6371km = 8919.4 km altitude above the surface.

Here is a graph of the gravity curve in metric units: at Re the gravity is G (just under 10m/s/s) and at an altitude of 2Re, the earth’s radius (6371 km) above its surface, the gravity is a fourth of its acceleration at the surface (Re) and at an altitude of 8919.4 km above the surface the gravity is half of the surface value.

Explanation:

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

starchy vegetables are high in carbohydrates.

starchy vegetables contain more carbohydrates than non-starchy vegetables.

explanation:

there are two primary categories of carbohydrates, essentially differentiated on the basis of their carbohydrate content (which is in the form of starch - a complex carbohydrate):

those vegetables which contain little amounts of starch are termed as non-starchy vegetables, and some examples include: artichokes, broccoli and bean sprouts.

vegetables high in their starch content are distinguished as starchy vegetables, and some examples include: potatoes, chickpeas and corn.