The nearest star to the earth is the red dwarf star proxima centauri, at a distance of 4.218 light-years. convert this distance to barleycorns. (1barleycorn=1/3 inch.)

Explanation:

The nearest star to the Earth is the red dwarf star Proxima Centauri, at a distance of 4.218 light-years.  

Light year is the unit of distance covered by the heavenly bodies. 1 light year is equal to :

So,

We need to convert 4.218 light-years barley corns.  

Since, 1 barleycorn = 1/3 inch  

So, the nearest star to the Earth is at a distance of . Hence, this is the required solution.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.