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.
- __ 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
- __ 1. Refer to figure A . What is the amount of force applied to rope "A" to lift the weight shown?(You must show your calculations) a. 12 pounds b. 15 pounds c. 20 pounds d. 30 pounds
- Describe the arrangement of subatomic particles in our current model of the atom. (2 marks) square
- A student starts at the origin and ends up at a position 500 meters north of the origin. She knows she walked 250 meters straight west, but then she was blindfolded and led to the final position . Assume she walked a straight path for the hidden leg of the trip. What displacement vector did she move? North square South square East square West square
- (e) The initial temperature of the mixture was +20^circ C The mixture froze at -1.5^circ C A total of 165 kJ of internal energy was transferred from the mixture to cool and freeze it. spectic heat capacity of the mixture=3500J/gg^circ C specific latent heat of fusion of the mixture=255000J/gg Calculate the mass of the mixture. Give your answer to 2 significant figures.