A student conducts an experiment to determine the speed of a toy car at the bottom of a ramp after it is released from different heights on the ramp. The student makes one measurement for each height.

What is one way that the student could improve the experiment?


use a different ramp for each height

perform multiple trials for each release height instead of just one

use a different timer for height

perform one trial for each measurement but use a different car for each height

Answer:

Liquor

Explanation:

Answer:

  1. place the bunsen burner away from any overhead shelving, equipment or lights by at least 1 foot.

2.  remove all un-needed supplies and excess chemicals from the area.

3. tie-back any long hair, take off loose jewlery, or change out of loose clothing.

Answer:

Claim: It is an answer to your question

Explanation:

Answer:

Explanation:

I don't know how you want the conversion done. I use dimensional analysis.

Jane

12 miles / hour [1.6 km/1 mile][1000 m/1 km][1 hour / 3600 sec]

12 * [1.6 * 3600 / 1000  m/s] = 69.12 m/s

5.33 m/s      This answer is a bit shorter than using 5280 feet.

Using 5280 feet

12 miles / hour [5280 ft/1 mile] [1 m/3.281 feet] * [1 hr/3600 sec]

12 * 5280 / (3.281 * 3600)

12 *. 4470

5.36

Jack

330 feet / minute [ 1 meter / 3.281 feet] [1 minute / 60 seconds]

330 * 1/(3.281 * 60)

330 * 1/(196.86)

1.676 m/s

She's going faster than he is, no matter which method is used to do the calculation

Answer:

264.7

Explanation:

26470 cm = 264.7 m

just move the decimal over two spaces.

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Condensation happens when molecules in a gas cool down. As the molecules lose heat, they lose energy and slow down. They move closer to other gas molecules. Finally these molecules collect together to form a liquid.

Hope it helps!

Brainliest pls!

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Aluminum is too high in the electrochemical series (reactivity series) to extract it from its ore using carbon reduction. The temperatures needed are too high to be economic. ... The aluminum oxide has too high a melting point to electrolyse on its own. The usual aluminum ore is bauxite.

ANSWER:

I calculated it in g/cm^3, It equals 0.9982 g/cm^3

The density of water at 20°C is found to be 0.9982 g/mL.  

Density may be defined as the classical measurement of quantity or mass per unit of volume in a particular substance. According to mathematics, density is simply characterized as mass divided by volume. That is:

[tex]Density = \frac{Mass }{Volume }[/tex]

Density typically describes how much space an object or substance takes up in relation to the amount of matter in that object or substance.

Density only significantly depends on the mass of the body as well as the volume occupied by it. The SI unit of density is kg/[tex]m^3[/tex]. The density remarkably does not vary much with respect to the temperature.

Therefore, the density of water at 20°C is found to be 0.9982 g/mL.  

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Answer:

i think it's B.

Explanation:

Answer:

Large-scale nuclear is fission a rare phenomenon on Earth because

atoms that undergo fission aren't concentrated enough to sustain a chain reaction.

Answer:

Atoms that undergo fission aren't concentrated enough to sustain a chain reaction. For example, the decay chain of U-238 is called the uranium series. ... Uranium is find in ores on Earth with very law mass percentage in it, so fission is not possible

The average speed of a body is the ratio of distance covered to time taken.

From the question, we have the following parameters;

Distance covered = 4.4 * 10^9 miles or 7081.1136 meters

Time taken = 2.0 years or 6.307 * 10^7 seconds

Average speed = Distance covered/ Time taken

Average speed = 7081.1136 meters/6.307 * 10^7 seconds

Average speed = 1.12 * 10^-4 m/s

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Answer:

A. The product formed have more energy than the reactants.

This is because it is an endothermic reaction.

[tex].[/tex]

Non scientific careers are the careers that do not involve a person studying science courses or pursuing fields related to sciences.

Some of the nonscientific careers that use chemistry include:

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Answer: B

Explanation: The engine cycle begins with the intake stroke as the piston is pulled towards the crankshaft (to the left in the figure). The intake valve is open, and fuel and air are drawn past the valve and into the combustion chamber and cylinder from the intake manifold located on top of the combustion chamber.

Answer:

molecular formula = molar mass ÷ empirical formula

n = 142 ÷ 142

n = 1

molecular formula (P2O5)1 = P2O5

Answer:

The cause of periodicity in properties is the repetition of similar outer electronic configuration after certain regular intervals. For example, all the elements of group 1 i.e. alkali metals have a similar outer electronic configuration, ns1.

Answer:

uvo 8hih8hjfiuwubosbwbhp0heg

Answer:

0.021 in scientific notation is 2.1 x 10^-2

Explanation:

Since there are two zeros before the non-zero digits, 10 should be raised to -2.

hope this helps

Using scientific notation, one can express extremely big or extremely small values. When a number between 1 and 10 is multiplied by a power of 10, the result is represented in scientific notation. 0.021 in scientific notation is 2.1 x 10⁻².

A way to express numbers that are either too large or too little to be conveniently stated in decimal form is through scientific notation. It is also known as "scientific form" in Britain, because scientists, mathematicians, and engineers frequently use it for intricate calculations involving large numbers.

A condensed manner of writing numbers is known as scientific notation (also known as standard form). A number is represented by a number from 1 to less than 10, multiplied by a power of 10, when it is written in scientific notation.

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Answer:

so here is the answer (What kind of a question my freind

Explanation:

Graham crackers are a whole wheat sweet cookie used in baking and making S'mores. Did you know that Graham crackers are called that because they're made from Graham Flour? It's a flour similar to conventional whole wheat flour in that both are made from the whole grain, but Graham flour is ground more coarsely.

Answer:

Both.

Explanation:

In decomposition, two processes occur. Firstly, because of chemical change the colour of the top layer is transformed. And secondly, due to first reaction it turns into bark and it's a physical change.

So both the changes are the part of decomposition reaction.

The decomposition of the bark of fungi is a chemical change. So the correct option is A.

The word decomposition literally means “to break down”. The process usually relates to the disintegration of the complex organic matter into a simpler inorganic matter. It is a very significant and essential process of the ecosystem.

Hence, decomposition is a metabolic process, performed by living organisms. They take up raw materials in the form of complex compounds, turn process and then convert it into simpler compounds.

Bacteria, fungi, and a few other microorganisms are known as decomposers and they can initiate the process of decomposition. They survive on dead organisms by feeding on them.

The dead and decaying animals and plants are able to serve as raw materials. Upon their breakdown, they produce nutrients, carbon dioxide, water, etc. Dead animals, plants, and their remains are called detritus. This detritus is used by plants and are collectively known as saprophytes.

Therefore, the correct option is A.

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Answer:

1. Evaporation

2. Filtration

3. Distillation

4. Chromatography

Explanation:

[tex].[/tex]

Answer:

El rendimiento de tubérculos de la papa es vulnerable a las altas temperaturas y se ve desafiado por el aumento asimétrico de las temperaturas diurnas y nocturnas. Este estudio tuvo como objetivo evaluar la fotosíntesis, el crecimiento de biomasa, la distribución de la masa de tubérculos y el rendimiento de tubérculo seco en papas cosechadas temprano que se cultivaron en el campo bajo condiciones de alta temperatura diurna y nocturna durante diferentes etapas de crecimiento.

Answer:

a

Explanation:

everything can be broken down to a smaller less useful compounds but never destroyed

Answer:

0.052

Explanation:

0.0702 / 1.35 = 0.052

Answer:

magnesium chloride: MgCl2

zinc sulphide: ZnS

sodium sulphate: Na2SO4

calcium bicarbonate: Ca(HCO3)2

Answer: The sum of an atom's protons, neutrons, and electrons, with protons equal to 1 AMU each, and electrons are 0 AMU each.

Explanation: By convention, atomic mass of an element is calculated by adding the masses of it's protons, neutons, and electrons. By definition, protons and neutrons are assigned values of 1 "atomic mass unit," or AMU, each, and electons are so small that they are assigned a value of 0 AMU each. Thus, a carbon 12 isotope atom (6 protons, 6 neutrons, and 6 electrons) would have a total of (6+6+0 =) 12 AMU. Carbon-13 has an additional neutron, so it's mass is (6+7+0)= 13 AMU. Molecules are the sum of each of it's individual atoms.

What is an AMU in actual mass? The definition states that 1 AMU is 1/12 the mass of a sinlge Carbon 12 isotope. By defining it in this manner, independent laboratories can calibrate their own instruments with a universal standard. Yes, even the Klingons can calibrate in their own galaxy, far, far away. For those physicists who know the value of even small amounts of mass, 1 AMU is equal to 1.66054x10^-24 grams. Before you scoff, just be reminded that E=mc^2, so while m, mass, may be small, c^2 (speed of light squared) is very large.

Answer:

carbon-14

Explanation:

becouse protons and neutrons are nagetivly charged

Answer:

b be a pure substance

Explanation:

Answer:

[tex]\boxed {\boxed {\sf 5 \ m/s^2 }}[/tex]

Explanation:

We are asked to find the acceleration of a shopping cart, given the force and mass. According to Newton's Second Law of Motion, force is the product of mass and acceleration.

[tex]F= m \times a[/tex]

The mass of the shopping cart is 12 kilograms and the force is 60 Newtons. Let's convert the units for force. 1 Newton is equal to 1 kilogram meter per second squared, so the force of 60 Newtons is also 60 kilogram meters per second squared.

Substitute the values into the formula.

[tex]60 \ kg *m/s^2 = 12 \ kg \times a[/tex]

We are solving for the acceleration, so we must isolate the variable a. It is being multiplied by 12 kilograms. The inverse operation of multiplication is division, so we divide both sides by 12 kg.

[tex]\frac {60 \ kg *m/s^2 } { 12 \ kg}= \frac{12 \ kg \times a }{12 \ kg}[/tex]

[tex]\frac {60 \ kg *m/s^2 } { 12 \ kg}=a[/tex]

The units of kilograms cancel.

[tex]\frac {60 \ m/s^2 } { 12 }=a[/tex]

[tex]5 \ m/s^2 =a[/tex]

The acceleration of the shopping cart is 5 meters per second squared.