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

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

When someone slams her books on a table the kinect energy is transferred into vibrations that travel to your ears as sound waves which statement describes the movement of those waves

In a system, when potential energy decreases, then entropy also decreases. true false