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Dovator [93]
3 years ago
7

A new object, Object Z, was discovered outside our solar system. Object Z is made of frozen gases that surround a rocky core and

it travels in a highly elliptical orbit around the sun. The characteristics of Object Z most closely resemble those of other
A. asteroids.
B. dwarf planets.
C. comets.
D. moons.
Physics
2 answers:
FinnZ [79.3K]3 years ago
8 0

That's the familiar description of a comet.

If I were the amateur astronomer who discovered the new comet, then
according to the tradition of the astronomical community, I would have
the privilege of naming it.  I would call it  Comet AL2006/2016. 
Masja [62]3 years ago
8 0

Answer:  C. comets.

Explanation:

  • Asteroids are rocky objects majority of which are found in belt between orbits of Mars and Jupiter. Example: Ceres
  • Dwarf planets are similar in composition to planets and are found in Kuiper belt. Pluto is a dwarf planet.
  • A comet has a solid rocky core surrounded by atmosphere of frozen gases. Comets are present in the outskirts of the solar system and orbit the Sun in an elliptical orbit.
  • Moons are are natural satellites revolving about planets. Example: Titan, Phobos and Deimos etc.

Object Z is made of frozen gases that surround a rocky core and it travels in a highly elliptical orbit around the sun.  The characteristics are similar to ones of comets. Thus, object Z closely resembles a comet.

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The Assignment: A fixed quantity of an ideal gas (R 0.28 kJ/kgK; Cv-0.71kJ/kgK) is expanded from an initial condition of 35 bar,
Nikolay [14]

Answer:

Index of expansion: 4.93

Δu = -340.8 kJ/kg

q = 232.2 kJ/kg

Explanation:

The index of expansion is the relationship of pressures:

pi/pf

The ideal gas equation:

p1*v1/T1 = p2*v2/T2

p2 = p1*v1*T2/(T2*v2)

500 C = 773 K

20 C = 293 K

p2 = 35*0.1*773/(293*1.3) = 7.1 bar

The index of expansion then is 35/7.1 = 4.93

The variation of specific internal energy is:

Δu = Cv * Δt

Δu = 0.71 * (20 - 500) = -340.8 kJ/kg

The first law of thermodynamics

q = l + Δu

The work will be the expansion work

l = p2*v2 - p1*v1

35 bar = 3500000 Pa

7.1 bar = 710000 Pa

q = p2*v2 - p1*v1 + Δu

q = 710000*1.3 - 3500000*0.1 - 340800 = 232200 J/kg = 232.2 kJ/kg

7 0
3 years ago
A mass m = 14 kg is pulled along a horizontal floor with NO friction for a distance d =5.7 m. Then the mass is pulled up an incl
frosja888 [35]

Answer:

W ≅ 292.97 J

Explanation:

1)What is the work done by tension before the block goes up the incline? (On the horizontal surface.)

Workdone by the tension before the block goes up the incline on the horizontal surface can be calculated using the expression;

W = (Fcosθ)d

Given that:

Tension of the force = 62 N

angle of incline θ =  34°

distance d =5.7 m.

Then;

W = 62 × cos(34) × 5.7

W = 353.4 cos(34)

W = 353.4 × 0.8290

W = 292.9686 J

W ≅ 292.97 J

Hence,  the work done by tension before the block goes up the incline = 292.97 J

8 0
3 years ago
Which are characteristics of mammals? Check all that apply.
Neporo4naja [7]

Answer:

one of the characteristics of a mammal is their several hollow bones another is their three chambered heart and the last is highly developed nervous system

Explanation:

the reason i picked those three is because not all mammals live their life on land and also mammals font have internal fertillization when they are done they take care of their babies and when they grow up they live their own life

6 0
3 years ago
Which amusement park ride utilizes periodic motion?
tatyana61 [14]
Any ride that oscillates back and forth or moves only in a complete circle utilizes periodic motion.
8 0
3 years ago
Which of the following terms is given to a pair of stars that appear to change position in the sky, indicating that they are orb
Ad libitum [116K]

Answer:

option A

Explanation:

The correct answer is option A

The binary star system is the system in which two stars are continuously orbiting each other,

In the eclipsing binary system, two stars revolve about there center of mass and in this system one one-star eclipse another star.

Spectroscopic binary stars are found from the observation of radial velocity and the brighter member of such binary can be seen to have continuously changed the wavelength and periodic velocity.

When the pairs of stars appear to change position in the sky then it is known as visual binary.

5 0
3 years ago
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