A car traveled at an average speed of 60 mph for two hours. How far did it travel? A.
30 miles

B.
60 miles

C.
120 miles

D.
150 miles
i need help and please answer

Answers

Answer 1

Answer: C-120 hope this helps

Answer 2

Answer: C.) Average speed = total distance/total time. Total time= avg speed x time = 60x2 = 120miles.

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PLEASE HELPWhich conducts heat more efficiently- a solid, liquid or gas? Why is that (explain on molecular level)?

Answers

Answer

solids conduct heat more efficiently ! basically their particles are more tightly packed and stay in that position, so the heat transfer by collision allows for the best conduction

Explanation:

hope this helps ! :)

Which of the following is NOT a true statement about liquids?1. Liquids have no definite shape.
2. The boiling point of a liquid will increase with increasing atmospheric pressure.
3. The boiling point of a liquid will decrease with decreasing atmospheric pressure.
4. Liquids have no definite volume.

Answers

Answer:

Explanation:

1 is correct

Liquids have no definite shape as they take up the shape of the container. Thus, we can say a liquid has no shape of its own but rather has the shape of the container in which it is filled.

2 is correct

When the atmospheric temperature is increased, it also will increase the boiling point of the liquid

3 is correct

This is an extension of the statement 2. While we decrease the atmospheric pressure, we are also decreasing the boiling point

4 is incorrect

A liquid have a definite volume. When we say a volume is definite, it means the volume is fixed and does not change. The volume of liquids is definite for a particular mass of the liquid and does not change

Final answer:

The statement 'Liquids have no definite volume' is not true. Liquids do have a definite volume, but no definite shape. The boiling point of a liquid changes with atmospheric pressure.

Explanation:

The statement ' Liquids have no definite volume' is NOT a true statement about liquids. In fact, while they do not have a definite shape and take on the shape of their container, liquids do have a definite volume under given conditions.

Statements 2 and 3 accurately describe that the boiling point of a liquid varies with changes in atmospheric pressure. Specifically, the boiling point increases with increasing atmospheric pressure, and conversely decreases with decreasing atmospheric pressure.

Learn more about Properties of Liquids

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A force of 1 700 N is applied to a 1 300 kg car. what is the magnitude of acceleration of the car?

Answers

Hello!

Answer:

$\Large \boxed{\sf 1.30 m/s^2}$

Explanation:

→ The force applied to an object is equal to:

$\sf a = F / m$

Where:

- a is the acceleration

- F is the force

- m is the mass

→ So, the acceleration of the car is equal to:

$\sf a = F / m \n\n= 1700 N / 1300 kg\n\n \approx 1.30 m/s^2$

Conclusion:

The acceleration of the car is 1.30m/s².

Explanation:

acceleration is directly proportional to the force and inversely proportional to the mass of the object

a=f/m

=1700/1300

Which statement correctly describes a sample of gas confined in a sealed container? (1) It always has a definite volume, and it takes the shape of the container. (2) It takes the shape and the volume of any container in which it is confined. (3) It has a crystalline structure. (4) It consists of particles arranged in a regular geometric pattern.

Answers

A gas does not have a specific shape or volume (so we reject option A), instead it adjusts itself to the container (which is further influenced by other forces such as gravity and temperature) and it with time, willl fill the whole container evenly, so the correct answer is:
(2) It takes the shape and the volume of any container in which it is confined

A catalyst is added to a system at equilibrium. If the temperature remains constant, the activation energy of the forward reaction(1) decreases(2) increases(3) remains the same

Answers

When a catalyst is added to a system the equilibrium concentration remains unchanged. A catalyst increases the activation energy of the forward reaction. The correct option is 2.

What is a catalyst?

A substance which increases the rate of a reaction without itself undergoing any permanent change chemically or quantitatively is defined as the catalyst and the phenomenon is known as the catalysis. It is believed that a catalyst usually participates in the chemical reaction and it speeds up.

In short, the catalyst lowers the energy barrier and thereby provides a different path of lower activation energy for the reaction so that the rate of the reaction increases.

A catalyst speeds up both the forward and backward reactions to the same extent and does not alter equilibrium constant. Thus it speeds up the attainment of equilibrium faster.

Thus the correct option is 2.

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The catalyst would increase the rate of the forward reaction...

And increase the rate of the backward to the same extent thus not affecting equilibrium.

If 2.0 moles of a substance are dissolved in 2.0 liters of solution, then the molarity of this solution is:0.5 M

1.0 M

1.5 M

2.0 M

Answers

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. The concentration of the solution is calculated as follows:

Molarity = 2.0 moles / 2.0 L

Molarity = 1.0 M

Answer:

1.0 M

Explanation:

Hello,

Molarity is a unit of concentration accounting for the amount of the moles of a solute per liter of solution as shown below:

$M=(n_(solute))/(V_(solution))$