25% part (a) draw a system schema for considering the motion of the ball, and free-body diagrams for ball at these instants: when he is holding it and accelerating it upwards, when he has released it and the ball is moving up, at the top when the velocity is 0, and when it is coming down before he catches it. label the forces in your free-body diagrams to indicate the type of force, who is causing the force, and who is feeling the force. draw your diagrams so we can tell which forces are equal and which are larger. use our standard notation for forces, f typea→b

Ineed the answer to question 1 , i’m desperate

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block