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The final speed of the  green ball : 8.5 m/s

Given

mass of Croquet ball = 0.5 kg

v₁= 10 m/s

v₁'= 1.5 m/s

Required

the final speed

Solution

The law of conservation of momentum

m₁v₁ + m₂v₂ = m₁v₁ '+ m₂v₂' (1=red croquet ball, 2=green croquet ball)

v₂=0 (at rest)

Input the value :

[tex]\tt 0.5\times 10+0.5\times 0=0.5\times 1.5+0.5\times v_2'\\\\5=0.75+0.5v_2\\\\4.25=0.5v_2\rightarrow v_2=8.5~m/s[/tex]

Answer:

is there a picture.....????

Answer:

Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.

Explanation:

Conduction is the transfer of thermal energy through direct contact.  Radiation is the transfer of thermal energy through thermal emission.

Answer:

= 1.615 moles

Explanation:

I did it on a test and got it right

Answer:

Different

Explanation:

Surely, the longitude lines and latitude lines where you are different from the longitude lines and latitude lines where your friend is. This is evident from the fact that sun's position in the sky is different at same time of the date. Your are the equator, then your friend must be above equator in northern hemisphere or below in southern hemisphere.

1.37 × 10⁻²¹ mol C

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

825 atoms C

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

[tex]\displaystyle 825 \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C} )[/tex] = 1.36998 × 10⁻²¹ mol C

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.36998 × 10⁻²¹ mol C ≈ 1.37 × 10⁻²¹ mol C

Answer:

The state of matter is solid

Explanation:

Answer:There is colder and drier air coming

Explanation:

Answer:

Cold fronts generally move from northwest to southeast. The air behind a cold front is noticeably colder and drier than the air ahead of it. When a cold front passes through, temperatures can drop more than 15 degrees within the first hour.

Explanation:

Answer:

A. The smallest unit of matter.

Explanation:

Atoms make up everything and are the smallest unit of all units.

Answer:

Upward delivery or downward displacement of air

Explanation:

The method of collection of a gas is dependent on it's density.

Gases that are less dense than air are collected by upward delivery or downward displacement of air while gases that are denser than air are collected by downward delivery or upward displacement of air.

Hydrogen is less dense than air hence it is collected by upward delivery or downward displacement of air.

Answer:

true hope that helps

Explanation:

Answer:

A

Explanation:

a is the right answer abi

Answer:

Al(No3)3

Explanation:

hope this is correct....

Answer:

CaCO3: 1 calcium 1 carbon 3 oxygen

CaO: 1 calcium 1 oxygen

CO2: 1 carbon 2 oxygen

To see the number of atoms of any element in a particular molecule or compound, we need to multiply the stoichiometry that is written in front of the molecule to the number that is written on the foot of that element.  The number of atoms of calcium, carbon and oxygen are 1, 1, 3.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.

The balanced reaction is

[tex]CaCO_{3}\rightarrow CaO + CO_{2}[/tex]

There are three types of element present in this reaction: calcium, oxygen and carbon

Number of atoms of calcium on reactant and product side is 1

Number of atoms of carbon on reactant and product side is 1

Number of atoms of oxygen on reactant and product side is 3

Therefore, the number of atoms of calcium, carbon and oxygen are 1, 1, 3.

To know more about atom, here:

https://brainly.com/question/13518322

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Answer:

The Answer is option D

Explanation:

The nucleus of a radioactive element is unstable. The nucleus will break down over time, reducing the amount of the element remaining.

Answer:

B 2

Explanation:

I checked it and it’s right hope this helps!!

Answer:

kilograms

Explanation:

hope this helps, pls mark brainliest :D

Answer:kilogram

Explanation:

I got the smarts

Answer:

Amount of ice

Explanation:

When we talk about independent variable, we mean that variable in an experiment that is manipulated and its effect on the dependent variable is measured.

In this case, the amount of ice in each water sample determines the temperature of each sample. Hence the amount of ice is the independent variable.

Answer:

ice cubes added

Explanation:

Answer:

I think they both need water and sun light to stay alive

Explanation: Animals need water so they can have energy and they have extra energy when they are in the sun they have more energy

Answer:

1)Carbonated water is saturated with carbon, hence it gives off carbon through bubbles.

2)Adding sugar to water until it no longer dissolves creates a saturated solution.

3)Continuing to dissolve salt in water until it will no longer dissolve creates a saturated solution.

An unsaturated tea and sugar solution would be one into which you could add more sugar and have the sugar still dissolve

Answer:

Explanation:

Kinetic energy is the energy in motion. Cooling if liquid would cause decreased temperature and hence slow down the oscillation of the particles.

Likewise, increased heat reduces the force of attraction between said particles, which allowed for their free movement. So the cooling would have opposite effect.

Finally, the space between the particles would remain the same as it was originally, as their force of attraction is increased in the cooling process, they would take the form they are held in.

I hope this was helpful and concise?

Answer:

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position). A moving car possesses mechanical energy due to its motion (kinetic energy).

Explanation:

Answer:

mass = 37.8 g

Explanation:

mass = mol × molar mass

mol = 0.2

molar mass = Zn(NO3)2

Zn = 65

N = 14

O = 16

substitute the values into Zn(NO3)2

Zn(NO3)2

= 65+2[ 14+3(16) ]

= 65 + 2(62)

= 65 + 124

= 189 g/mol

mass

= mol × molar mass

= 0.2 mol × 189 g/mol

= 37.8 g

Answer:

I DONT GET IT IETHER

Explanation:

DONT GET IT

Answer:

3. CO + 3H₂ ⇒ H₂O + CH₄

Explanation:

match reactants and products on both sides of the equation.

Answer:

8 valence electrons

Explanation:

Neon is a noble gas, and all noble gases have 8 valence electrons. The same goes for its group; all elements in the last group of the periodic table have a full valence shell--8 electrons.

Answer: Metal atoms lose the electron/ electrons in their highest energy level and become positively charged ions.

Answer:

Cations

Explanation:

Cations (positively-charged ions) and anions (negatively-charged ions) are formed when a metal loses electrons, and a nonmetal gains those electrons. The electrostatic attraction between the positives and negatives brings the particles together and creates an ionic compound, such as sodium chloride.

Key Terms:

➡An anion can be defined as an atom or molecule that is negatively charged. ➡A cation can be defined as an atom or molecule that is positively charged. ➡They have an opposite electrical charge, therefore they get attracted to each other.

Answer:

they change the object hehehehe

Answer:

D. Perform repeated trials.

Explanation:

I did the exam and got it correct :D!

Answer: 0.0009 moles of octane were used up.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]

Given mass of octane = 0.1 g

Molar mass of octane = 11.23 g/mol  

Putting in the values we get:

[tex]\text{Moles of octane}=\frac{0.1g}{114.23g/mol}=0.0009moles[/tex]

Thus 0.0009 moles of octane were used up.