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pav-90 [236]
2 years ago
12

A man uses oars to paddle a boat across a lake, as shown below. The subsequent motion of the boat is best explained by Newton's

law of action-reaction. Why? *
A) As each oar pushes the water, the water pushes back, making the boat move forward.
B) The mass of the oars is more than the mass of the man, which makes the boat move forward.
C) The gravitational pull on the oars makes the boat move foward.
D) The water is in motion and will remain in motion until the oars make it stop, pushing the boat forward.
Chemistry
2 answers:
Alex787 [66]2 years ago
7 0

Answer:

A

Explanation:

Over [174]2 years ago
4 0

Answer:

B) The mass of the oars is more than the mass of the man, which makes the boat move forward.

Explanation:

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Drupady [299]

Answer:

The significance of "Er" in the diagram is :

B.) Threshold energy for reaction

Explanation:

Threshold energy : It is total amount of energy required by the reactant molecule to reach the transition state .

Activation energy : It is the excess energy absorbed by the molecules to reach the transition state.

<u>Activation Energy = Threshold Energy - Average Kinetic Energy</u>

<u>This means Activation energy decreases on increasing kinetic energy</u>

On increasing Temperature average kinetic energy of the molecule increases which reduces the activation energy and the reaction occur faster in that case.

Catalyst also reduces the Activation energy.

<u>Er = Threshshold energy for reaction at 30 degree</u>

<u>Ea = Activation Energy</u>

<u>The given figure shows that the threshold energy decreases on increasing the temperature</u>

<u>Only the molecule having energy greater than Er can react to form product</u>

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3 years ago
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Which two parts of the atom are found in nucleus?
faust18 [17]

Answer:

protons and neutrons are found in nucleus

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3 years ago
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Prform the following operation and express the answer in scientific notation 6.0 x 10^3-2.310^3
Marrrta [24]

The value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

<h3> What is scientific notation?</h3>

Scientific notation is a way to write very large or very small numbers so that they are easier to read and work with.

You express a number as the product of a number greater than or equal to 1 but less than 10 and an integral power of 10 .

<h3>Why it is used? </h3>

There are two reasons to use scientific notation.

  • The first is to reveal honest uncertainty in experimental measurements.
  • The second is to express very large or very small numbers so they are easier to read.

Given,

= 6.0 x 10^3- 2.3 × 10^3

= (6.0 - 2.3) × 10^3

= 3.7 × 10^3

Thus, we find that the value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

learn more about scientific notation :

brainly.com/question/18073768

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3 0
2 years ago
The isotope 106 46Pd (106 on top and 46 on bottom)
vazorg [7]

Answer:

4. 60 neutrons.

Explanation:

The given isotopes;

         ¹⁰⁶₄₆Pd

In this isotope, we can deduce that the mass number is the superscript and the atomic number is the subscript;

     Mass number  = 106

     Atomic number  = 46

Mass number is the number of protons and neutrons in an atom;

       Mass number = Protons + neutrons

Atomic number is the number of protons

   

So,  Number of protons  = 46

Number of neutrons  = Mass number  - Atomic number

                                    = 106  - 46

                                     = 60

Number of neutrons  = 60

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Analytical chemistry has two branches, _____, that are important to forensic chemistry. qualitative and quantitative qualitative
tatuchka [14]

Answer:

qualitative and quantitative

Explanation:

8 0
1 year ago
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