Find the resistance of a portable lantern that uses a 20V power supply and draws a current of 0.5A.

well, the required resistance will be = 40 ohms

Explanation:

let the resistance be R

according to OHM's law :

potential difference ( v ) =

resistance ( R ) × current ( I )

so, 20v = 0.5 A × R

=》20v / 0.5 A = R

=》R = 40 ohms

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.