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Montano1993 [528]
3 years ago
9

Four of your friends are in new relationships, but only two of these relationships are healthy. Which of your friends are in unh

ealthy relationships that have escalated to a safety risk? Take a look at the chart below to determine the answer: Jessica's partner says/does Kristen's partner says/does Shane's partner says/does Jack's partner says/does Jokes about Jessica's taste in music Prefers to make decisions and plans Asks, "What do you want to do tonight?" Wants Jack to cancel family time to go on a date Does not like Jessica gong out on the weekend Likes to discuss feelings and concerns together Laughs often at mutual jokes Yells to get Jack's attention Says, "Why do you make me so angry sometimes?" Wants to socialize with Kristen's brother and friends Shares new ideas and likes to be right all the time Pushes Jack jokingly Who is in an unhealthy relationship?
Physics
2 answers:
Ne4ueva [31]3 years ago
7 0
Jack and Jessica are in unhealthy relationships
svet-max [94.6K]3 years ago
5 0
Jack and Jessica are unhealthy 

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A merry-go-round with a rotational inertia of 600 kg m2 and a radius of 3.0 m is initially at rest. A 20 kg boy approaches the m
nekit [7.7K]

Answer:

The velocity of the merry-go-round after the boy hops on the merry-go-round is 1.5 m/s

Explanation:

The rotational inertia of the merry-go-round = 600 kg·m²

The radius of the merry-go-round = 3.0 m

The mass of the boy = 20 kg

The speed with which the boy approaches the merry-go-round = 5.0 m/s

F_T \cdot r = I \cdot \alpha  = m \cdot r^2  \cdot \alpha

Where;

F_T = The tangential force

I =  The rotational inertia

m = The mass

α = The angular acceleration

r = The radius of the merry-go-round

For the merry go round, we have;

I_m \cdot \alpha_m  = I_m \cdot \dfrac{v_m}{r \cdot t}

I_m = The rotational inertia of the merry-go-round

\alpha _m = The angular acceleration of the merry-go-round

v _m = The linear velocity of the merry-go-round

t = The time of motion

For the boy, we have;

I_b \cdot \alpha_b  = m_b \cdot r^2  \cdot \dfrac{v_b}{r \cdot t}

Where;

I_b = The rotational inertia of the boy

\alpha _b = The angular acceleration of the boy

v _b = The linear velocity of the boy

t = The time of motion

When the boy jumps on the merry-go-round, we have;

I_m \cdot \dfrac{v_m}{r \cdot t} = m_b \cdot r^2  \cdot \dfrac{v_b}{r \cdot t}

Which gives;

v_m = \dfrac{m_b \cdot r^2  \cdot \dfrac{v_b}{r \cdot t} \cdot r \cdot t}{I_m} = \dfrac{m_b \cdot r^2  \cdot v_b}{I_m}

From which we have;

v_m =  \dfrac{20 \times 3^2  \times 5}{600} =  1.5

The velocity of the merry-go-round, v_m, after the boy hops on the merry-go-round = 1.5 m/s.

5 0
2 years ago
A 380-N girl walks down a flight of stairs so that she is 2.5 m below her starting level. What is the change in the girl's gravi
Svetach [21]
PEg = Mass x Height x Gravity. So it doesn't matter how much PEg she started with, since you're finding how much it changed when she walked down 2.5 meters of stairs. So by plugging into the equation, you'll find how much potential energy was lost by walking down. (I'll leave it up to you since idk if you use 10 or 9.8 as gravity)
8 0
3 years ago
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A body is projected upward making angle theta with horizontal .with the velocity of 300m/s .find its range and time of flight.​
uysha [10]

Answer:

Answer is in the picture

8 0
2 years ago
who developed the quantum theory? who is remembered as the father of nuclear science? who developed the theories of relativity?
DerKrebs [107]

Answer:

1.Albert Einstein is considered as the one who developed the quantum theory. Although Planck gives the idea of quantized energy but Einstein gives the theory that not only the energy the wave or radiation itself is quantized.

2. Earnest Rutherford is considered as the father of nuclear science as he gives the concept of half life and  perform tests of alpha and beta radiations in various elements.

3. Again Albert Einstein was the one who gave the theory of relativity in 1905.

Explanation:

7 0
3 years ago
explain to the guest and learners the procedure and guidelines that are used in making an instrument used to monitor the tempera
Aloiza [94]

In  making a thermometer used to monitor the temperature of the water, a glass tube, a scale, and a thermometric liquid such as alcohol is required.

<h3>What is a thermometer?</h3>

A thermometer is an instrument that is used to measure or read the temperature of a body or a substance.

There are different types of thermometers such as:

  • Liquid-in-glass thermometers
  • Gas thermometers
  • Resistance thermometers

A simple liquid-in-glass thermometer consists of the following parts:

  • A glass tube
  • A scale
  • A thermometric liquid such as alcohol

Therefor, in making a thermometer used to monitor the temperature of the water, a glass tube, a scale, and a thermometric liquid such as alcohol is required.

In conclusion, a thermometer is the instrument used in measuring temperature.

Learn more about thermometers at: brainly.com/question/25034625

#SPJ1

3 0
2 years ago
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