You found that the final temperature of the iced tea is between 0 ∘c and 75.0 ∘c, as the strategy indicated it should be. evaluate the work you did to find the final temperature by considering how it would change if the initial conditions were varied.
you decide to make several more batches of iced tea. the conditions under which you make these batches are identical except that for each batch one initial condition is varied. determine the impact that each of these changes will have on the final temperature of the iced tea.
decrease the volume of the tea.
decrease the mass of ice.
increase the initial temperature of the tea.
decrease the initial temperature of the ice.
sort these changes to the initial conditions of the system based on whether they would cause the final temperature to be smaller than or greater than the temperature of the system found in part c

decrease the volume of the tea.
decrease the mass of ice.
increase the initial temperature of the tea.
decrease the initial temperature of

If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves

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?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional