What did Galileo discover about Jupiter that supported Copernicus?
What will be an ideal response?
Its four moons were a model solar system, orbiting a larger central body just as the smaller planets orbit the Sun.
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A 92.5 kg stunt man stands on a piston that will launch him out of a vertical tube. The piston applies a constant force F to the man’s feet. Starting from rest, the force is applied as the man moves vertically 3.25 m, and while the piston is pushing, the man attains a velocity of 25.5 m/s. What was the man’s apparent weight during this time interval?
A. 9.3 kN B. 18.5 kN C. 19.4 kN D. 10.2 kN
A pendulum swings through a total of 28 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration?
a. 28 b. 14 c. 56
Non-conservative forces convert mechanical energy into other forms of energy, or convert other forms of energy into mechanical energy
Indicate whether the statement is true or false
Addition by 1. Components: Vector 
has a magnitude of 4.0 m and points 30° south of east. Vector 
has a magnitude of 2.0 m and points 30° north of west. The resultant vector 
+ 
is given by
A. 10.0 m at an angle 30° south of east. B. 10.0 m at an angle 60° east of south. C. 2.0 m at an angle 60° south of east. D. 2.0 m at an angle 30° south of east. E. 1.0 m at an angle 30° east of south.