Two identical spaceships are traveling in deep space, far from any planet or stars. The ships travel in the same direction, with the slower one directly behind the faster one. The ships are connected by a cable attached to a spool, so that part of the cable outside the ships can be made longer or shorter as needed. The cable is used to bring the ships to the same speed for a transfer of cargo. The graph above shows the speed of the two ships during a 10 second interval. Does at least one of the ships have its engine turned on during the time interval shown, and what evidence indicates so? The horizontal axis shows time from 0 to 10 seconds, and the vertical axis shows velocity from about 7990 to 8010 meters per second. Two sets of data points are plotted: solid dots for Ship 1 and open circles for Ship 2. Ship 1 starts near (0,8100) and trends to (10,8005). Ship 2 starts near (0,7990) and trends to (10,8005).

A line graph has time in seconds on the horizontal axis from 0 to 5 seconds and position x in meters on the vertical axis from 0 to 14. Straight line segments connect the points (0,8), (1,10), (2, 12), (3, 11), (4, 10), and (5, 9).

The inclined plane in the figure above has two sections of equal length and different roughness. The dashed line shows where section 1 ends and section 2 begins. A block of mass M is placed at different locations on the incline. The coefficients of kinetic and static friction between the block and each section are shown in the table below. Diagram of block M on inclined plane split into two sections, angle theta labeled at base. Coefficient of Friction Section 1 Section 2 Static Kinetic If the block is sliding up section 2, what is the magnitude of the force of friction that is exerted on the block by the incline?

A student conducts an experiment to determine the relationship between applied torque and changing angular velocity. The student uses the apparatus shown in the figure above, consisting of two discs that are glued together and mounted on a horizontal axle. Blocks of varying mass are hung from a string wound around the smaller disc. The blocks are released from rest, exerting different torques on the discs, and are allowed to fall a fixed distance. For each block, the time of fall t in the final angular velocity wf of the discs are measured. There is considerable friction between the disks and the axle. Which of the following best represents a plot that can be obtained from the student’s data?

A line graph has time t in seconds on the horizontal axis from 0 to 6 and velocity v in meters per second on the vertical axis from 0 to 5. Straight line segments connect the points (0,0), (2,4), (4,1), and (6,5). The three line segments are labeled 1 on the rising segment, 2 on the falling segment, and 3 on the final rising segment. For another identical object initially at rest, no frictional force is exerted during segment 2 (between t = 2 s and t = 4 s). A rope exerts the same constant force of magnitude FT as in the previous scenario. What is the change in the objects kinetic energy during segment 2?

A system consists of two spheres, of mass m and 2m, connected by a rod of negligible mass, as shown above. The system is held at its center of mass with the rod horizontal and released from rest near Earth’s surface at time t = 0. Which of the following best explains why the system does not rotate around its center of mass as it falls?

Describe the general immunological acute inflammatory response following tissue injury and exposure to foreign antigens. Include the following components within your description: acute phase reactants, phagocytosis, diapedesis, neutrophils, chemotaxis, macrophages, cytokines (chemical mediators), vascular permeability.

21. The Vietnam War was part of

35. Sovereignty refers to

20. Which of the following is most accurate about the study of climate change in the field of international relations?