I need help on this, please tell me what it is.

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Answer 1

Answer:

Answer:

maria is right.

Explanation:

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What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )

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The answer is 6 Joules. The kinetic energy (KE) of an object is the product of half of the mass (m) of the object and the square of its velocity (v²): KE = 1/2m*v². We know that m = 0.75 kg and that v = 4 m/s. Therefore, KE = 1/2 * 0.75 kg * (4 m/s)² = 1/2 * 0.75 kg * 16 m²/s² = 6 kg*m²/s² = 6 J.

Answer:

Explanation:

jus took the test :)

Match the letters to the numbers for 30 points!1.Ca
2.H2O
3. nuclear decay
4. nuclear synthesis
5. η
6. positive charge
7. e
8. number of protons in nucleus

A.element
B.proton
C. fusion
D. compound
E.fission
F.atomic number
G. neutron
H.electron

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-- 'Ca' (Calcium) is an element.
-- The proton has a positive charge.
-- Nuclear fusion results in the synthesis of atoms of new elements.
-- H₂O (water) is a chemical compound.
-- Nuclear fission is a decay of the nucleus.
-- The atomic number of an element is the number of protons
in each atom of it.
-- I suppose you're using the Greek letter η ('eta', not 'nu')
to represent the neutron.
-- I suppose you're using ' e ' to represent the electron.

1-a
2-d
3-e
4-c
5-g
6-b
7-h
8-f

The _____ theory is the most accepted theory regarding the origin of the solar system. It suggests that our star, the Sun, was first created by a cloud of dust and gas.

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The Nebular Hypothesis is the most accepted explanation of the origin of our solar system. It states that the Sun was formed by a massive cloud of dust and gas light-years across, and it was bigger than the actual sun itself. Most of the mass in the center formed the sun, and the rest expanded outward.

A. Nebular is the answer

A 2.75 kg sample of a substance occupies a volume of 250 cm³ . Find the density in g/cm³ and kg/m³