A gas occupies a volume of 20 cubic meters at 9,000 pascals. If the pressure is lowered to 5,000 pascals, what volume will the gas occupy?

Answer: The answer is 3000 K and Centauri A.

Explanation:

Just did it and got it right ♡´･ᴗ･`♡

Answer:

What is the approximate temperature of the supergiant Betelgeuse?  

3000 K

Which star on this diagram is the most similar to the Sun in luminosity and temperature?

Centauri A

The correct answer to the question is D). Gravity.

EXPLANATION:

Before coming into any conclusion, first we have to understand centripetal force.

Centripetal force is the force which is required to keep a body moving in a circular path. This force always acts along the radius and towards the centre.

As per the question, the object is moving around the earth. As it is moving in a orbit, it needs a centripetal force which will help the object stick to the orbit.

The centripetal force required is provided to the object by the gravitational force of earth .

Air resistance and friction play no role in imparting centripetal force to the object.

Hence, the correct option of this question is gravity, which is the only force that acts on an object orbiting earth.

Answer:

Cobalt has one less proton.

Explanation:

Nickel and Cobalt both has almost same atomic mass number approximately 59 but has different atomic number.

Number of proton and electrons in an atom is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Case 1: Cobalt

Atomic mass number = 59

Atomic number = 27

Number of proton and electrons in Nickel is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of proton = 27

Number of proton = 27

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Number of neutrons = 59 - 27

Number of neutrons = 32

Case 2: Nickel

Atomic mass number = 59

Atomic number = 28

Number of proton and electrons in Nickel is given by,

Number of proton = Number of electron = atomic number of an atom.

Number of proton = 28

Number of neutron in an atom is given by,

Number of neutrons = Atomic mass number - atomic number

Number of neutrons = 59 - 28

Number of neutrons = 31

Cobalt has one less proton.

Thus, Option D is correct.

Answer: The correct answer is option D.

Explanation:

Cobalt and Nickel both are transition metals which means that their last electron enter d-orbitals.

These two elements have similar atomic masses but differ in the atomic number.

Atomic number is equal to the number of protons or electrons present in that element.

Atomic number = number of protons =  number of electrons

Atomic Mass is the sum of protons and neutrons in an element

Atomic mass = Number of protons + Number of neutrons

• For Cobalt:

Atomic Number = 27

Number of protons = 27

Atomic mass = 59

Number of neutrons = 59 - 27 = 32

Hence, Number of protons in this element is 27 and number of neutrons are 32.

• For Nickel:

Atomic Number = 28

Number of protons = 28

Atomic mass = 59

Number of neutrons = 59 - 28 = 31

Hence, Number of protons in this element is 28 and number of neutrons are 31.

• From the above information, it is visible that cobalt has one less proton that the nickel.

Hence, the correct answer is option D.

Final answer:

A 12-volt car battery produces more current than a 1.5-volt TV remote battery because it has a greater difference in electric potential energy, resulting in a larger 'push' of electrons and therefore a larger current.

Explanation:

A 12-volt car battery produces more current than a 1.5 volt battery for a TV remote because the car battery has a greater difference in electric potential energy. The electric potential energy is related to the voltage of the battery, or the 'push' it provides to move electrons through a circuit. A higher voltage means a greater 'push' and thus, more current. This is evidenced by the fact that car batteries are designed to start cars, which requires a larger current than operating a TV remote.

Learn more about Electric Potential Energy here:

brainly.com/question/12645463

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