PHYSICS HIGH SCHOOL

The scientific unit of force is the _________.a. watt
b. joule
c. newton
d. kilogram

Answers

Answer 1
Answer: The correct answer is C
Answer 2
Answer:

Answer:

The correct answer is c

Explanation:

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What is the final temperature when 50 g of water at 20°c is mixed with 75 g of water at 60°c

Answers

44C i think. Do you have options for the answer?

A racecar is equipped with a computer that records the reading on its speedometer every second during a race. If you graph this data, what will be the best choice for the dependent variable?

Answers

Since the device is a speedometer, the data it read is the speed of the racecar. Data recording involving time usually uses time as the independent variable. It was also said in the problem that it records the speed every second which shows that the time interval is constant. This means that only other data, the car's speed, is the dependent variable.

In the diagram, what is happening to the temperature at Point B? Question 6 options: A. The temperature is rising as the molecules break apart from each other B. The temperature is not rising because the heat is being used to break the connections between the molecules C. The temperature is dropping as the molecules break apart from each other D. The temperature is rising as the substance melts E. The temperature is not rising because the molecules are slowing down

Answers

Answer: The correct answer is option D.

Explanation:

At point B, the temperature becomes constant which means that energy given to the substance is getting used in to the breaking of forces which are present in between the molecules of the substance. These forces are known as inter-molecular forces. Or we can also say that ,at point B the state of the substance is changing.

Hence, the correct answer is option D.
B. The temperature is not rising because the heat is being used to break the connections between the molecules

What is a hypothesis

Answers

A hypothesis can be described as an intelligent guess 

What is water made up of?

Answers

Pure water is made up of a huge number of water molecules.

Each water molecule is made of two Hydrogen atoms and one
Oxygen atom, locked together by the electrons they share.
2 Hydrogen and 1 Oxygen otherwise known as H2O, if that's what your looking for

Sound waves are produced by the horn of a truckthat is approaching a stationary observer.
Compared to the sound waves detected by the
driver of the truck, the sound waves detected by
the observer have a greater
(1) wavelength (3) period
(2) frequency (4) speed

Answers

Compared to the sound waves detected by the driver of the truck, the sound waves detected by the observer have a greater "(2) frequency" and will be more high pitched. 

Answer: The correct option is (2).

Explanation:

Doppler effect is the phenomenon in which the frequency of the wave increase or decrease when there is relative motion between the source and the listener. There is an apparent change in the frequency.

When the source and the listener are approaching each other then there will be increase in the frequency.

When the source and the listener are moving away form each other then there will be decrease in the frequency.

In the given problem, Sound waves are produced by the horn of a truck

that is approaching a stationary observer. The sound waves detected by the observer have greater frequency.

Therefore, the correct option is (2).
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