A car starts from rest and reaches a top speed of 80 m/s. If the car did this is 20 seconds . What is the acceleration ?

Answers

Answer 1

Answer: 80 m/s divided by 20 seconds is 4 m/s so the acceleration is 4 m/s

Answer 2

Answer:

somethingExplanation:

Related Questions

What is the difference between an atom in the ground state and an atom in an excited state? A. The atom in the ground state has less energy and is less stable than the atom in an excited state. B. The atom in an excited state has one fewer electron than the atom in the ground state. C. The atom in an excited state has more energy and is less stable than the atom in the ground state. D. The atom in an excited state has one more electron than the atom in the ground state.
Write a story about Bacteria using asexual reproduction it must include a reason why it is engaging in asexual reproduction. It must also include one benefit and one disadvantage to asexual reproduction. It must be 6 sentences long and use appropriate spelling and conventions.
Under which condition will air behave as conductor?
Particles are arranged in a crystal structure in a sample of:a) H2 (g)b) Br2 (L)c) Ar (g)d) Ag (s)
The measurement of moles of solute per kilogram of solvent is known asa. molarity. b. molality. c. parts per million.

Why are some elements more reactive than others?

Answers

All other atoms have less stable electron numbers, so they react with each other and share electrons to be more stable. The most reactive elements tend to be short one or two electron or have one or two extra electrons.

because of extra electrons

Iron has a density of 7.86 g/cm3 (1 cm3=1 mL). Calculate the volume (in dL) of a piece of iron having a mass of 4.01 kg . Note that the density is provided in different units of volume and mass than the desired units of volume (dL) and the given units of mass (kg). You will need to express the density in kg/dL (1 cm3 = 1 mL) before calculating the volume for the piece of iron.

Answers

510.17 cm³ is the volume of Iron has a density of 7.86 g/cm3 (1 cm3=1 mL) and has a mass of 4.01 kg.

What is density?

Density is the amount of mass of a substance present per volume of the cubic centimeter and it is the ratio of the mass of a substance to the volume of the substance with a unit centimeter cube.

The Iron has a density of 7.86 g/cm³ and mass of 4.01 kg so,

mass in gram = 4.10 / 1000 = 0.041

Density = mass/volume

Substituting the value in the equation,

volume = 0.041 /7.86 g/cm³

volume = 510.17 cm³

Therefore, the volume of Iron has a density of 7.86 g/cm3 (1 cm3=1 mL) and has a mass of 4.01 kg is 510.17 cm³.

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4.01 kg in grams :

4.01 x 1000 = 4010 g

Density = mass / volume

7.86 = 4010 / volume

Volume = 4010 / 7.86

Volume = 510.17 cm³

hope this helps!

The density of aluminum is 2.70 g/cm3. What is the mass of 235 cm3 of aluminum? 634.5 g
635 g
635 g/cm3
634.5 ml

Answers

Answer:

JUST B

Explanation:

Final answer:

The mass of 235 cm³ of aluminum, which has a density of 2.70 g/cm³, is calculated to be 634.5 g using the formula Mass = Density × Volume.

Explanation:

To find the mass of a given volume of a substance, you can use the formula: Mass = Density × Volume. In this case, the density of aluminum is given as 2.70 g/cm³ and you need to find the mass of 235 cm³ of aluminum.

Substitute the given values into the formula:

Mass = 2.70 g/cm³ × 235 cm³ = 634.5 g

Therefore, the mass of 235 cm³ of aluminum is 634.5 g.

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The study of metals and the process for refining and making things from them is called _____. philosophy
18
metallurgy
inductive reasoning

Answers

The study of metals and the process for refining and making things from them is called metallurgy.Metallurgy is said to be the scientific study both of the extraction and refining process of metals from their ores.This process includes steps such as grinding of the ore also called ore pulverization.Ore is crushed to increase its surface area for purpose of increasing the level of its reactivity.Sometimes, the ore is heated in the presence of oxygen to turn the ore into and oxide. This process is known as roasting.

the answer would be:

C. metallurgy

Given the balanced equation: 3fe3+(aq) + al(s) → 3fe2+(aq) + al3+(aq)what is the total number of moles of electrons lost by 2 moles of al(s)?

Answers

Answer is: the total number of moles of electrons lost by two moles of aluminium are six moles (6 mol).
Oxidation half reaction: Al° → Al³⁺ + 3e⁻, lost of electrons.
Reduction half reaction: Fe³⁺ + e⁻→ Fe²⁺ /·3; 3Fe³⁺ + 3e⁻→ 3Fe²⁺; gain of electrons.
One mole of aluminium lost 3 moles of electrons, so 2 moles of alumiunim:
2 · 3 mol = 6 mol.

What mass of ammonium sulfate ((NH4)2SO4 132.15 g/mol) is required to produce 282 mL of a 2.50M solution of ammonium sulfate?