During a 20 hour test for a 12-V battery with a mass of 15 kg, the current delivered by the battery was 2 A. What is its energy density? a.
640 Watt. hr/kg

b.
18 Watt. hr/kg

c.
32 Watt. hr/kg

d.
480 Watt. hr/kg

4

explanation:

4

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

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.