Physics Homework Aid

Physics holds significant importance among the natural sciences, elucidating life's wonders and ranking among the most challenging subjects to master.

QuestionAI is a rich and user-friendly physics problem solver for novice physicists, enabling exploration of atomic properties and interactions, alongside molecular trajectories under various forces. Furthermore, you can delve into the mysteries concealed amidst galaxies with fellow physics enthusiasts. Boldly pose your conjectures and queries to the AI, and authoritative answers will readily emerge.

. 9. Before a star is born, the matter that will become the star exists as a __ black hole bright, explosive supernova red giant cool, dark nebula

Scientists know the universe is expanding because of the blue shift of distant galaxies. red shift of the brightest galaxies. blue shift of the brightest galaxies. red shift of distant galaxies.

9. If "B"=50 pounds, what would box "A" have to weigh for this lever to be in balance? a. MomentofB= b Moment of A= A= c. Weight of A= A=

3. Mechanical advantage may be calculated by dividing the __ by the __ MA=R/E __ Solve for the unknown variable in the following problems 4. Weight=400pounds Effort=100pounds MA= 5. Effort=500pounds Weight=250pounds MA= 6. Mechanical advantage of 10. Weight=1000pounds Effort = Effort= 7. Mechanical advantage of 2, Effort of 50 pounds Weight= 8 Dotormine the amount of force required at "B" to balance this lever when 'A' is

__ 2. What force must be applied to roll a 120-pound barrel up an inclined plane 9 feetlong to a height of 3 feet (disregard friction)? (You must show all your work). LIRRE L=length of ramp, measured along the slope I=height of the ramp R=weight of the object to be raised or lowere E-force required to raise or lower the object a. 40 pounds b. 120 pounds c. 360 pounds d. 393 pounds