# 1. Which of the following is NOT part of John Dalton's atomic theory? A. All elements are composed of atoms. B. All atoms of the same element have the same mass. C. Atoms contain subatomic particles. D. A compound contains atoms of more more than one element. 2. Who provided evidence for the existence of a nucleus in an atom? A. John Dalton B. J. J Thomson C. Democritus D. Ernest Rutherford

His theory did not incorporate the existence of subatomic particles.

2. D

## Related Questions

What mass (in mg) does 2.63 moles of nickel have?

2.63 moles ( 58.69 g/mol ) = 154.35 g Nickel

Hope this answers the question. Have a nice day.

Use Kepler's 3rd Law

T^2 = k R^3

where k = 4(pi)^2/ GM

G =gravitational constant = 6.67300 × 10-11 m3 kg-1 s-2

M = mass of this new planet

pi = 3.14159265

T =3.09 days = 266976 seconds

R = (579,000,000km)/9 = 64333333.3 km

a)

Solve Kepler's 3rd Law for M. Your answer will be in kg

b)

mass of the sun = 1.98892 × 10^30 kilograms

Form the ratio

M(planet)/M(sun)

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**Answer:**

Part a)

Part b)

**Explanation:**

Part a)

As we know that

here we know that

so we will have

Part b)

if finally the snowmobile comes to rest

So here we can say that

so now we have

Nuclear reactions result in tremendous amounts of a. uranium. b. energy. c. fission. d. mass.

Which tools would be use to find an irregularly shaped object’s mass and volume?

Any beaker to measure the volume of liquid displaced

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Shearing

The stress force that causes a mass of rock to pull or twist in opposite directions is called shearing.

Hope this helps! :)

Hence mass grows 3 times - g will grow 3 times as well

2. change the meters to kilometers;

120 m/km = .12 km/km = .12

or the kilometers to meters;

120 m/km = 120 m/1000m = .12

This sounds like its telling you how far you climb vertically (.12 km) for every 1 km that you walk along the slanted, winding trail.

The unitless number ".12" is usefull because now you can think of the rate of climb in any units you want. So you rise vertcally .12 miles for every mile you walk the trail, or you rise .12 ft for every foot you walk the trail, etc.

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The law of conservation of mass states that _______________________________.

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A net force of 125 N accelerates a 25.0 kg mass. What is the resulting acceleration?

Answer:

Explanation:

The acceleration of an object can be calculated by using Newton's second law:

where

F is the net force applied on the object

m is the mass of the object

a is its acceleration

In this problem, we have F=125 N and m=25.0 kg, so we can rearrange the equation to calculate the acceleration:

the answer is d i just took the test k 12 right

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The accepted standard measurement for mass is the A) liter. B) pound. C) Newton. D) kilogram.

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Force times Mass equals Acceleration.

**The answer is TRUE.**

If the mass increases the number on the left side of the equation increases, thus increasing the right side as well.

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**Answer: Option (b) is the correct answer.**

**Explanation:**

Plasma is a hot ionized gas that contains approximately equal number of both positive ions and negatively charged electrons.

Thus, we can conclude that **if a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a plasma.**

Rounded to the nearest whole number, what is the atomic mass of platinum? 78 117 195 273

**Answer: **The atomic mass of the platinum will be 195.

**Explanation:**

**We know that,**

Atomic mass is the sum of the electrons and protons.

Platinum is the chemical element and it is the symbol is Pt. The atomic number of the platinum is 78 and the atomic mass is the 195,084 u.

According to the question,

Rounded to the nearest whole number

**Hence, The atomic mass of the platinum will be 195.**

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Crystals can have _____ bonds between their atoms. ionic covalent metallic all types of

__Answer;__

All types of

Crystals can have **all types of** bonds between their atoms.

__Explanation__;

__Crystals are solid materials which contains atoms, molecules or ions that are arranged in a complex structure forming a crystal lattice.__, these includes;*Crystals may have all types of bonds*__ionic bonds, formed as a result of transfer between a metallic bond and a non-metal atom, Covalent bond, formed as a result of sharing electrons between non metal atoms, hydrogen bonds, metallic bonds Van der Waals bonds, etc.__

What is meant by the following statement? "Acceleration is inversely proportional to mass."

**Answer:**

he gave the correct answer its just we had options when we were doing this assignment so thanks for going in depth

**Explanation:**

Ps Odsseyware

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