Three of the special ideal-gas processes involve a changing volume: isobaric, isothermal, and adiabatic. Consider three different compressions, all starting at the same initial state (with initial pressure of Pị, initial temperature Ti, and initial volume Vi). All three processes involve compressing the gas by half, so the final volume in each case is V? = { vi. A. a. Determine whether the change in temperature AT for each process is positive, negative or zero. B.
b. Based on your answer above, rank the final pressure of the gas in each process (Pf isobaric, Pf, isothermal, and Pf, adiabatic) from largest to smallest. P C.
c. Sketch the three processes on the PV diagram . All of them should start at the same state on the diagram, but end at different states. Label each process on your diagram
D. Use the area under each curve to rank the work done on the gas in each process, from largest to smallest.
E. Determine whether the heat flow to the gas is positive, negative, or zero for each process

Follow these directions and answer the questions. 1. shine a pencil-thin beam of light on a mirror perpendicular to its surface. (if you don't have a laser light as suggested in the video, you can make a narrow beam from a flashlight by making a cone from black construction paper and taping it over the face of the flashlight.) how does the light reflect? how does the relationship of incident to reflected ray relate to the reflection of water waves moving perpendicular to a barrier? 2. shine a pencil-thin beam of light on a mirror standing on a sheet of paper on the table (or floor) so that you can mark the incident ray and reflected ray. (you can support the mirror from the back by taping it to a wooden block.) 3. mark a line on the paper representing the reflective surface. (the reflective surface of a mirror is usually the back edge.) 4. draw a dashed line perpendicular to the mirror surface at a point where the incident and reflected ray meet. this perpendicular is called a normal to the surface. 5. measure the angles between the rays and the normal. the angle of incidence is the angle formed by the incident ray and the normal to the surface. the angle formed by the reflected ray and normal is called the angle of reflection (r). what is the angle of incidence? what is the angle of reflection? 6. repeat for several different angles. (see report sheet for details.) what appears to be the relationship between the angle of incidence and angle of reflection? in science 1204, what was the relationship for these two angles made by the reflection of waves in a ripple tank? 7. roll a ball bearing so that it hits a fixed, hard surface (a metal plate) at several angles (including head-on). observe the way in which the ball bearing reflects. what generalization can you make about how a ball bearing reflects from a wall? have you proved that light can only behave like a wave?

What is the momentum of a 2 kg object moving at 15 meters per second

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )