n ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the temperature of 0.180 mol of the gas is raised from 30.0°C to 325°C?

A 1300 kg aircraft going 35 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 16.3 m/s after the collision. If they skid for 14.3 seconds before stopping, how far did they skid? Hint: Are the aircraft moving at a constant velocity after the collision or do they experience an acceleration?

During a relay race, you run the first leg of the race, a distance of 1.8 ✕ 102 m to the north, in 22.34 s. You then run the same distance back to the south in 24.20 s in the second leg of the race. Suppose the positive y axis points to the north. (Express your answers in vector form). (a) What is your average velocity for the first leg of the relay race? vav, y = Incorrect: Your answer is incorrect. m/s (b) What is your average velocity for the entire race? vav, y = Correct: Your answer is correct. m/s

A flywheel turns through 30 rev as it slows from an angular speed of 5.5 rad/s to a stop. (a) Assuming a constant angular acceleration, find the time for it to come to rest. (b) What is its angular acceleration? (c) How much time is required for it to complete the first 15 of the 30 revolutions?

You stand on a straight desert road at night and observe a vehicle approaching. This vehicle is equipped with two small headlights that are 0.621m apart. At what distance, in kilometers, are you marginally able to discern that there are two headlights rather than a single light source? Take the wavelength of the light to be 559nm and your pupil diameter to be 4.69mm. Answer in km!

1. Look at your data in Table 1. What was the last measured temperature before the all ice melted (so it was still mixture of ice and water)?
2. Look at your data in Table 1. Describe what happened to the temperature of the water as during melting process
3. What happened to the temperature of the water after it melted?
4. Based on your observation of temperature during melting process hypothesize how the temperature of the water changed during freezing process.

5. What happened to the temperature of the water, which was placed on the oven top, during the heating process?

6. Look at your data in Table 2. What happened to the temperature of the water after it started boiling?

7. What was the temperature of your boiling water? The standard boiling temperature for water is 100 °C. Does your measurement agree with this? Explain why or why not.

8. Explain why temperature does not change during a phase change. Where does the heat energy go if not into increasing or decreasing temperature?

In what ways does a tightrope walker’s pole increase stability?

Please Type Out Answer

In the figure, a thin horizontal bar AB of negligible weight and length L = 3.2 m is hinged to a vertical wall at A and supported at B by a thin wire BC that makes an angle θ = 40° with the horizontal. A block of weight W = 140 N can be moved anywhere along the bar; its position is defined by the distance x = 2.07 m from the wall to its center of mass. Find (a) the tension in the wire, and the (b) horizontal and (c) vertical components of the force on the bar from the hinge at A.

A long wire carrying a 4.5A current perpendicular to the xy-plane intersects the x-axis atx=?2.0cm.

Part A

At what point on the x-axis is the magnetic field zero if the two currents are in the same direction?

Express your answer using two significant figures.

Part B

At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions?

Express your answer using two significant figures.

A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To do this, she measures the blood pressure just before the region of blockage and finds that it is 1.20×10⁴ Pa , while in the region of blockage it is 1.15×10⁴ Pa . Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at 27.5 cm/s , and the specific gravity of this patient's blood is 1.06.

Part A: What percentage of the cross-sectional area of the patient's artery is blocked by the plaque?

A turntable rotating 33 rev/m slows to a stop in 10s. If the acceleration is constant, the number of revolutions through which the turntable rotates in the 10 is?

A. 7.8

B. 1.4

C. 12.2

D. 2.7

E 6.1

Describe what parallax is.

the position a the rocket sled on a straight track is given as x= at^3+ bt^2+c, where a= 1.04m/s^2, b=1.94 m/s^2, and c= 8.29m. what is the sled's average speed between t= 3.72 and t=6.79

Water flowing along a horizontal pipe has a speed of 2.31 m/s and a pressure of 4.25 atm. Further along, the pipe narrows so that the cross-sectional area decreases by a factor of 6.17. What is the pressure in the narrow section?