Physics College

The social model was created by​

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Answer 1
Mike Oliver was the social media creator

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At the top of a flight of stairs, a woman is 16m above the ground and has 9094J of potential energy. What is the mass of the woman?

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Answer:

Mass = 56.83 Kg

Explanation:

[tex]PE = mgh\\9094 J = 16m*10 m/s^2*mass\\mass = \frac{PE}{g*h} \\mass = \frac{9094 J}{16*10} = 56.83 kg[/tex]

A scuba tank, when fully submerged, displaces 14.4 L
of seawater. The tank itself has a mass of 12.6 kg
and, when "full," contains 4.21 kg
of air. Assuming only a weight and buoyant force act, determine the net force (magnitude) on the fully submerged tank at the beginning of a dive (when it is full of air).

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The net force on the fully submerged scuba tank at the beginning of a dive is 18.484 N upward.

What is the net force on a fully submerged scuba tank at the beginning of a dive?

The net force acting on the fully submerged tank is equal to the difference between its weight and the buoyant force acting on it.

The weight of the tank can be calculated as the product of its mass and the acceleration due to gravity (9.81 m/s²):

weight = mass x gravity

weight = 12.6 kg x 9.81 m/s²

weight = 123.606 N

The buoyant force on the tank is equal to the weight of the seawater displaced by the tank. The displacement volume of the tank is given as 14.4 L. We can convert this to cubic meters, as follows:

1 L = 0.001 m³

14.4 L = 14.4 x 0.001 m³ = 0.0144 m³

The density of seawater is approximately 1025 kg/m³, so the weight of the displaced seawater can be calculated as follows:

weight of displaced seawater =

density x volume x gravity

weight of displaced seawater = 1025 kg/m³ x 0.0144 m³ x 9.81 m/s²

weight of displaced seawater = 142.09 N

Therefore, the buoyant force on the tank is equal to 142.09 N.

The net force on the fully submerged tank can now be calculated as follows:

net force = weight - buoyant force

net force = 123.606 N - 142.09 N

net force = -18.484 N

The negative sign indicates that the buoyant force is greater than the weight of the tank, so there is a net upward force on the tank.

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chapter 7 psychology

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The correct answer for the first question is b. compliance. Milgram's research found that people were more likely to comply with authority figures, even if it meant delivering potentially lethal shocks to another person.

How is compliance used

However, follow-up studies have suggested that a teacher's willingness to deliver shocks may be more a product of compliance than obedience because people often comply with social norms and expectations without necessarily believing in them or being obedient to authority figures.

The public service messages that encourage parents to talk to their children about drugs are promoting b. direct instruction as a method of attitude formation. Direct instruction involves providing explicit information or guidance to shape a person's attitudes or beliefs. In this case, the messages are encouraging parents to directly instruct their children about the dangers of drugs and how to avoid them. Direct contact, on the other hand, involves personal experiences or interactions that shape attitudes, such as meeting someone who has struggled with drug addiction.

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