Three charges with q = +6.3

A piston-cylinder device contains 0.56 kg of steam at 300 degrees C and 1.4 MPa. Steam is cooled at constant pressure until one-half of the mass condenses.

(a) Find the final temperature. T₁= _______ degrees celcius

(b) Determine the volume change in m³

A small plastic sphere with a charge of -5nC is near another plastic sphere with a charge of -12nC. (a) If the spheres repel one another with a force of magnitude 8.2 x 10^-4, what is the distance between the spheres? (b) What is the new value of the force if the distance doubles its original value?

A ball with a mass of 0.615 kg is initially at rest. It is struck by a second ball having a mass of 0.380 kg , initially moving with a velocity of 0.260 m/s toward the right along the x axis. After the collision, the 0.380 kg ball has a velocity of 0.230 m/s at an angle of 37.4 ∘ above the x axis in the first quadrant. Both balls move on a frictionless, horizontal surface.

What is the magnitude of the velocity of the 0.615 kg ball after the collision?

What is the direction of the velocity of the 0.615 kg ball after the collision?

What is the change in the total kinetic energy of the two balls as a result of the collision?

What is true when it comes to the concept of FLOATING FREE in SPECIAL RELATIVITY, choose one of the three alternatives each for a) - d)

a) AN OBSEVER NEEDS ACCESS TO (1. His own watch (wrist-watch time) - 2. All synchronised watches in ALL Free-Float Frames - 3. All synchronised watches in ONE Free-Float Frame)

b) A TEST-PARTICLE (1. Has zero mass - 2. Generates neglectable gravitational field - 3. Is a standardised particle (SI-standard)

c) FREE-FLOAT FRAME IS USED BECAUSE (1. It makes gravity stronger - 2. It makes gravity weaker - 3. It makes gravity ”disappear”)

d) A FREE-FLOAT FRAME NEEDS TO BE LOCAL BECAUSE (1. Gravitational field can be different in different places - 2. To prevent zero effect on tide (high/low water) 3. To prevent the test particles mass to become zero)

A 44.0 kg body is moving in the direction of the positive x-axis with a speed of 373 m/s when owing to an internal explosion, it breaks into three pieces. One part, whose mass is 6.5kg, moves away from the point of explosion with a speed of 438 m/s along the positive y-axis. A second fragment, whose mass is 5.0 kg, moves away from the point of explosion with a speed of 378 m/s along the negative x-axis.

What is the speed of the third fragment? Ignore effects due to gravity.  

How much energy was released in the explosion?

Two point charges, Q1 = 3.0 μC and Q2 = -1.7 μC , are placed on the x axis. Suppose that Q2 is placed at the origin, and Q1 is placed at the coordinate x1 = − 3.0 cm. At what point(s) along the x axis is the electric field zero? Determine the x-coordinate(s) of the point(s). Express your answer using two significant figures. If there is more than one answer, enter your answers in ascending order separated by commas.

A. At what point(s) along the xx axis is the electric field zero? Determine the xx-coordinate(s) of the point(s).

B.At what point(s) along the xx axis is the potential zero? Determine the xx-coordinate(s) of the point(s).

1. Relative to horizon stars rise in east and set in west everyday. a) True b) False

2. Relative to horizon the planets rise from west and set in east t every day. a) True b) False

3. During absorption of light electrons move from lower orbits to higher orbits a) True b) False

4. Apparent path of the sun among stars is called zodiac. a) True b) False

5. Galileo is the first astronomer to suggest the sun is at the center of universe. a) True b) False

6. According to Kepler’s second law planets move faster when they are closer to the sun. a) True b) False

7. The objects that exhibit retrograde motion are planets and nearby stars. a) True b) False

8. Babylonians used deferent and epicycles to explain the retrograde motion of planets. a) True b) False

9. Planets closer to the sun take less time to go around the sun once compare to the planets farther away from sun. a) True b) False

10. Refraction telescopes use mirrors as objective. a) True b) False

11. Color of light depends on a) amplitude of the wave b) wavelength of light wave c) medium it travels d) its speed

12. Which of the following did the model of Copernicus and the model of Kepler have in common? a) planets move in elliptical orbits b) planets move around the sun c)the motion of planets are uniform d) both a & b.

13. Circumpolar stars are a) brightest stars b) stars in Zodiac c) stars never set d) none of these

14. Light year is defined as a) distance from earth to sun b) distance to nearest star c) distance that light travels in one year d) distance that earth travels around sun in one year

15. Which of following is not a telescopic discovery of Galileo. a) moons of Jupiter b) mountains of moon c) new planet Pluto d) sunspots

16. Resolution of a telescope depends on its a) length b) diameter c) weight d) location on the earth

17. Who used the telescope to observe the sky first? a) Copernicus b) Aristotle c) Galileo d) Kepler

18. An astronomical unit (a.u) is defined as a) a reference unit of time between stars b) distance that light travels in 1 day c) the average distance between the sun and the earth. d) The average distance between the earth and the moon.

19. Phase of the moon during solar eclipse is a. new moon b. first quarter c. third quarter d. full moon E N S W

20. According to the diagram, what is the approximate time a. 9 AM b. noon c. 3 PM d. 3 AM Sun

21. According to the diagram, what is the phase of the moon? 22. What types of electromagnetic radiation has more energy?

23. What is common to all types of electromagnetic waves? 24. As viewed from the earth, What is the angle from the sun to third quarter moon?

25. Why do we different phases (shapes) of the moon?

A research Van de Graaff generator has a 1.98-m-diameter metal sphere with a charge of 4.75 mC

on it.

a) What is the potential near its surface?

MV

b) At what distance from its center is the potential 1.02

MV

?

m

c) An oxygen atom with 3

missing electrons is released near the Van de Graaff generator. What is its energy in MeV

at this distance?

MeV

A 100 cm3 box contains helium at a pressure of 2.20 atm and a temperature of 100 ∘C. It is placed in thermal contact with a 220 cm3 box containing argon at a pressure of 3.70 atm and a temperature of 410 ∘C.

a) What is the initial thermal energy of each gas?

b) What is the final thermal energy of each gas?

c) How much heat energy is transferred, and in which direction?

d) What is the final temperature?

e) What is the final pressure in each box?

A 0.30-kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20-kg puck that is initially moving along the x-axis with a velocity of 9.0 m/s. After the collision, the 0.20-kg puck has a speed of 5.4 m/s at an angle of θ = 53° to the positive x-axis.

a)Determine the velocity of the 0.30-kg puck after the collision.

magnitude-?

direction-? (from the positive X-axis)

(b) Find the fraction of kinetic energy lost in the collision.

In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. Suppose the building had been constructed. Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 757 N, to the top of the building.

Which of the collisions below should definitely be treated as inelastic collisions?

A cream pie (TM) hitting a clown at 5 MPHTwo cars hitting each other head on at 15 MPHA bowling ball hitting a pin at 20 MPHTwo pool balls hitting each other head on at 10 MPHA superball hitting a concrete wall at 10 MPHA piece of clay going 10 m/s hitting a stationary bowling ball

Please explain the reasoning you used to answer the question above.

A cylindrical capacitor consists of a cylinder (of length L and radius a) with a total charge Q nested inside a thin conducting cylindrical shell (of length L and radius b) with total charge