The mass of a particular eagle is twice that of a hunted pigeon. Suppose the pigeon is flying north at ??,2=18.1vi,2=18.1 m/s when the eagle swoops down, grabs the pigeon and flies off. At the instant right before the attack, the eagle is flying toward the pigeon at an angle ?=40.3θ=40.3° below the horizontal and a speed of ??,1=37.9vi,1=37.9 m/s.

What is the speed of the eagle immediately after it catches its prey?

What is the magnitude of the angle, measured from horizontal, at which the eagle is flying immediately after the strike?

A heat engine takes 0.350 mol of a diatomic ideal gas around the cycle shown in the pV-diagram of the figure (Figure 1) . Process 1?2 is at constant volume, process 2?3 is adiabatic, and process 3?1 is at a constant pressure of 1.00 atm. The value of ? for this gas is 1.40.

Part B

Find the volume at points 1, 2, and 3.

Enter your answers numerically separated by commas.

Part C

Calculate Q, W , and ?U for the process 1?2.

Enter your answers numerically separated by commas.

Part D

Calculate Q, W , and ?U for the process 2?3.

Enter your answers numerically separated by commas.

Part E

Calculate Q, W , and ?U for the process 3?1.

Enter your answers numerically separated by commas.

A cube with mass M slides down a frictionless curved incline as shown in the
figure below. It has a completely inelastic collision with another cube m at the bottom that is

A diver springs upward from a board that is 3.02 meters above the water. At the instant she contacts the water her speed is 9.15 m/s and her body makes an angle of 77.2° with respect to the horizontal surface of the water. Determine her initial velocity.

A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without slowing down. At the end of the horizontal track, the block slides smoothly onto a second frictionless ramp. How far along the second ramp does the block travel before coming to a momentary stop, as measured along the incline of the ramp? After the block comes to a complete stop on the second ramp, it will then begin moving back down the second ramp. What is the speed of the block when it is 8.75 m, vertically, above the ground?

A film of soapy water (n = 1.33) on top of a sheet of crystalline quartz has a thickness of 168 nm. What wavelength is most strongly reflected if it is illuminated perpendicular to its surface? (This is the apparent color of the soapy film.)

1. Give several examples of cogeneration and heat pumps. Describe how they work and why they save energy.
2. Can the waste heat from nuclear plants do useful work? What happens to the wasteheat from power plants? How do the First and Second Laws of Thermodynamics apply to these processes?
3. Find numerical examples of energy usage and thermodynamic computations of efficiency. Use the web to compare the efficiencies of several power production processes. Which are in use and which are planned?

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 3.6 m/s² for 4.4 seconds. It then continues at a constant speed for 8.1 seconds, before applying the brakes such that the car

A pen contains a spring with a spring constant of 208 N/m. When the tip of the pen is in its retracted position, the spring is compressed 5.60 mm from its unstrained length. In order to push the tip out and lock it into its writing position, the spring must be compressed an additional 6.90 mm. How much work is done by the spring force to ready the pen for writing? Be sure to include the proper algebraic sign with your answer.

1. What is the weight of a 87.4 kg object? w=?

2.What was the average speed in km/h of a car that travels 798 km in 6.1h?

3. What net force is needed to give a 22 kg grocery cart an acceleration of 2.3 m/s² ?

4.Suppose a radio signal travels from Earth and through space at a speed of 3.0 × 10⁸ m/s. How far into space did the signal travel during the first 38.7 minutes?

5. How far away was a lightning strike if thunder is heard 5.23 seconds after seeing the flash? Assume that sound traveled at 350.0 m/s during the storm.

6.What is the acceleration of a car that moves from rest to 19.1 m/s in 10.0 s?

7. How long will be required for a car to go from a speed of 15.6 m/s to a speed of 26.7 m/s if the acceleration is 3.0 m/s²?

Ref: Yang

A box with mass m is dragged across a level floor having a coefficient of kinetic friction ?k by a rope that is pulled upward at an angle ? above the horizontal with a force of magnitude F.

Part A

In terms of m, ?k, ?, and g, obtain an expression for the magnitude of force required to move the box with constant speed.

Part B

Knowing that you are studying physics, a CPR instructor asks you how much force it would take to slide a 90-kg patient across a floor at constant speed by pulling on him at an angle of 25? above the horizontal. By dragging some weights wrapped in an old pair of pants down the hall with a spring balance, you find that ?k=0.35. Use the result of part A to answer the instructor's question.

Explain the relationship Fb = PVg

A block of mass m1 = 2.00kg and a block of mass m2 = 6.00kg are connected by a mass less string over a pulley in a shape of a solid disk having radius radius R=0.250m and mass M = 10.0kg. The fixed wedgede shaped ramp makes a angle of theta = 30.0 degrees. The coefficient of kinetic friction is 0.360 for both blocks. (a) draw diagram(b) acceleration of the two blocks(c) tension of both sides.

1.  A rectangular loop of wire (0.2 m wide and 0.3 m tall) carrying a current of 0.6 A is in the xy plane, with its right edge along the +y axis. A magnetic field (uniform, B = 1.2 T) exists along a direction that is 74° from the +z axis in the xz plane. What magnitude of torque will act on the loop of wire at that moment ? a) 0.42 Nm b)0.15 Nm c) 0.04 Nm d) 0.09 Nm

2. If the B-field in the previous problem was oriented at 50° from +x in the xz plane determine the magnitude and direction of the torque on a 150 turn loop of the same size as the coil in question#1. a) 4.2 Nm, along +y b) 2.8 Nm, along +y c) 1.1 Nm, along +z d) 0.5 Nm, along +z

3. Will the plane of the coil of wire in question #2 initially swing toward the +z or the -z axis? a) +z b) -z c) Neither +z nor -z

4. For the torque on a current carrying loop to be maximized, the angle between the normal to the plane of the loop and the B-field must be: a) zero. b)45°. c) 90° d) 180°