Can someone help me with these questions? 1. used the Sun to measure Earth’s size

2. proposed model of the solar system with Earth revolving around Sun

3. discovered that planets moved in ellipses

4. discovered four moons of Jupiter

5. made predictions about comets

6. discovered that the universe is expanding

7. came up with the most accepted theory about how the Earth’s and Moon’s tilts were formed

8. educated the general public on the universe

9. proposed that laws of physics applied throughout the universe


A) Einstein
B) Hartmann
C)Hawking
D)Copernicus
E)Kepler
F)Hubble
G)Eratosthenes
H)Halley
I)Galilei

1. G)Eratothenes

2. D)Copernicus

3. E) Kelper

4. I) Galilei

5. H) Halley

6. F) Hubble

7. B) Hartmann

8 A) Einstein

9. C) Hawking

it doesn't. it was imagined up in the middle ages.

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.