While walking home on a dark night, joanna saw a bright light in the sky and concluded that it must have been a spaceship
from another planet. which of these questions could joanna answer using scientific methods of investigation?
can aliens read our minds?
does loanna actually believe in aliens?
eueve in aliene
what is the aliens spacecraft made from?
what percent of people in the area saw a bright light that night?
-55

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.

54 degrees incident angle = reflected angle

angle is from normal turned to line of ray