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Brut [27]
3 years ago
7

In the diagram, what is happening to the temperature at Point B? Question 6 options: A. The temperature is rising as the molecul

es 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

Physics
2 answers:
raketka [301]3 years ago
6 0
<span> B. The temperature is not rising because the heat is being used to break the connections between the molecules </span>
Lesechka [4]3 years ago
3 0

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.

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A space station of diameter 20.0 meters is turning about its axis to simulate gravity at its center rim. How fast must it rotate
bezimeni [28]

Answer:

9.89 m/s

Explanation:

d = diameter of the space station = 20.0 m

r = radius of the space station

radius of the space station is given as

r = (0.5) d

r = (0.5) (20.0)

r = 10 m

a = acceleration produced at outer rim = 9.80 m/s²

v = speed at which it rotates

acceleration is given as

a = \frac{v^{2}}{r}

9.80 = \frac{v^{2}}{10}

v = 9.89 m/s

4 0
4 years ago
A child jumps on a trampoline, which of the following causes the child to rise in the air?
weeeeeb [17]

Answer:

Force pull the child up. With the springs and the weight when you jump.

4 0
2 years ago
A cyclist rode an average speed of 10 miles per hour for 15 miles how long was the ride
Ainat [17]
I think it's an hour and a half
7 0
3 years ago
A baseball pitcher loosens up his pitching arm. He tosses a 0.20-kg ball using only the rotation of his forearm, 0.28 m in lengt
aev [14]

Answer:

Moment of Inertia, I = 0.016 kgm²

Explanation:

Mass of the ball, m = 0.20 kg

Length of the pitcher's arm, l = 0.28

Radius of the circular arc, r = 0.28 m

Moment of Inertia is given by the formula:

I = mr²

I = 0.20 * 0.28²

I = 0.20 * 0.0784

I = 0.01568

I = 0.016 kgm²

7 0
3 years ago
What is the definition of the half-life of a radioactive isotope?
Illusion [34]

Answer:Half-life is the amount of time it takes for the initial mass of the isotope to decompose, by half, into other lighter atoms.

Explanation:Different radioactive isotopes have different half-lives. For example, the element technetium-99m has a half life of 6 hours. This means that is 100 kg of the element is left to decay, in 6 hours, 50kg of the mass will have changed into other elements/atoms. The half-life of uranium-238 is 4.5 billion years while that of polonium-216 is only 0.145 seconds.

5 0
3 years ago
Read 2 more answers
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