PHYSICS HIGH SCHOOL

What happens to water when it changes to ice?Its density increases.

Its density decreases.

Its mass increases.

Its mass decreases.

Its volume increases.

Its volume decreases.

Answers

Answer 1
Answer:

There are two answers to this:

  • Its density decreases
  • Its volume increases

You notice that ice floats on water, this means that its density is less. The mass remains the same because you did not add or remove anything. But what causes the density to decrease then? For density to change, there needs to be a change in either the volume or the mass of the object. Density is calculate by mass/volume. Since the mass did not change, the volume must have. So in this case, the volume increases. Hence, this is what causes it to be less dense.

Answer 2
Answer:

Answer

B and E

Explanation:

water molecules are connected with each other through hydrogen bonding

 

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You decide to go on a walk around the school. Starting from the student parking lot you move 25 m North and then 50 m West to reach a road. What is the total distance and displacement traveled on your brief trek?Distance:
Displacement:

Answers

Distance: The total distance traveled is the sum of the individual distances traveled in each direction. In this case, you moved 25 meters North and then 50 meters West. So, the total distance is:

Distance = 25 m (North) + 50 m (West) = 75 meters

Displacement: Displacement is the straight-line distance from the starting point to the final point, taking into account both the distance and direction. To calculate the displacement, you can use the Pythagorean theorem because the motion is in perpendicular directions (North and West).

Displacement = √((25 m)² + (50 m)²)

Displacement = √(625 m² + 2500 m²)

Displacement = √(3125 m²)

Displacement = 55.9 meters (rounded to one decimal place)

-the total displacement is approximately 55.9 meters in a direction that is between North and West.

If the road becomes wet or crowded, you should ____. slow down and increase your following distance All choices are incorrect. maintain your speed and following distance speed up and decrease your following distance Submit answer

Answers

Answer:

The first one.

Final answer:

If the road becomes wet or crowded, you should slow down and increase your following distance.

Explanation:

If the road becomes wet or crowded, you should slow down and increase your following distance. This is important because wet roads reduce tire traction and increase the risk of sliding and losing control. By slowing down and increasing your following distance, you give yourself more time to react and stop if necessary.

Learn more about Driving here:

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The length of some fish are modeled by a von Bertalanffy growth function. For Pacific halibut, this function has the form L(t) = 200(1 – 0.956e–0.18t ) where L(t) is the length (in centimeters) of a fish t years old.(a) Find the rate of change of the length as a function of time

Answers

Answer:

Rate of change of length as a function of time is given by (dL(t))/(dt)=34.416e^(-0.18t)

Explanation:

The length as function of time is given byL(t)=200(1-0.956e^(-0.18t))

Differentiating with respect to time we get

(dL(t))/(dt)=(d(200(1-0.956e^(-0.18t))))/(dt)\n\n(dL(t))/(dt)=200(d(1-0.956e^(-0.18t)))/(dt)\n\n=200* 0.18* 0.956e^(-0.18t)\n\n(dL(t))/(dt)=34.416e^(-0.18t)

Two identical capacitors are arranged in a circuit. What is the ratio of the equivalent capacitance of the circuit when the capacitors are in series to that when they are in parallel?

Answers

Ceq in series is calculated by 1/C1 + 1/C2 + ....
While, in parallel, Ceq= C1 + C2 + ...

So the ratio is 1/Ceq = Ceq

Which statement about transuranium elements is NOT true?A.) They have an atomic number above 92
B.) They are radioactive
C.) They can be synthesized
D.) They are common in nature

Answers

Transuranium elements are the elements with atomic numbers greater than 92. All of these elements are unstable and decay radioactively into other elements. The statement about transuranium element that is not true is that they are common in nature. The answer is letter D.

The statement about transuranium element that is not true is that they are common in nature. The

answer is letter D.

Waves = 24, Time
6 seconds, Frequency=

Answers

Answer:

4 times/second

Explanation:

24/6 = 4

THE END
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