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4 years ago

If a dancer's breathing is deep and rapid after performing a folk dance,what is the intensity of his activity?

Physics

1 answer:

andrezito [222]4 years ago

6 0

Answer:

Moderately Light

Explanation:

Dancer breathing deeply and rapid after performing a folk dance is moderately light kind of activity intensity.

Other examples of moderately intense exercise include brisk walking, hiking, playing tennis, pushing a lawn mover and water aerobics.

Moderately Intensity activities are those which allow you to move quickly or hard enough to consume three to six times more energy every minute than when you sit still.

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2) What are the directions of the velocity and acceleration of an object in

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Motion because the motion is the range

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4 years ago

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Which of the following most accurately represents John Dalton’s model of the atom? A. a tiny, solid sphere with an unpredictable

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A and c are the answersss

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4 years ago

1. 412.9 g of dry ice sublimes at room temperature. a. What’s changing? --- sublimation b. What constant will you use? ----- 25.

hoa [83]

1. 236 kJ

a. The phase (or state of matter) of the substance: from solid state to gas state (sublimation)

b. The enthalphy of sublimation, given by: $\lambda=571 J/g$

c. The equation to use will be $Q=m\lambda$ , where m is the mass of dry ice and $\lambda$ is the enthalpy of sublimation

d. The energy is being absorbed, because the heat is transferred from the environment to the dry ice: as a consequence, the bonds between the molecules of dry ice break and then move faster and faster, and so the substance turns from solid into gas directly.

e. The amount of energy being transferred is

$Q=m\lambda=(412.9 g)(571 J/g)=2.36\cdot 10^5 J=236 kJ$

2. 165 kJ

a. The phase (or state of matter) of the substance: from gas state to liquid state (condensation)

b. The latent heat of vaporisation of water, given by $\lambda=2260 J/g$

c. The equation to use will be $Q=m\lambda$ , where m is the mass of steam that condenses and $\lambda$ is the latent heat of vaporisation

d. The energy is being released, since the substance turns from a gas state (where molecules move faster) into liquid state (where molecules move slower), so the internal energy of the substance has decreased, therefore heat has been released

e. The amount of energy being transferred is

$Q=m\lambda=(72.9 g)(2260 J/g)=1.65\cdot 10^5 J=165 kJ$

3. 3.64 kJ

a. Only the temperature of the substance (which is increasing)

b. The specific heat capacity of silver, which is $C_s = 0.240 J/gC$

c. The equation to use will be $Q=m C_s \Delta T$ , where m is the mass of silver, Cs is the specific heat capacity and $\Delta T$ the increase in temperature

d. The energy is being absorbed by the silver, since its temperature increases, this means that its molecules move faster so energy should be provided to the silver by the surroundings

e. The amount of energy being transferred is

$Q=m C_s \Delta T=(39.2 g)(0.240 J/gC)(412.9^{\circ}C-25.9^{\circ}C)=3641=3.64 kJ$

4. 89 kJ

a. Both the phase of the substance (from solid to liquid) and then the temperature

b. The latent heat of fusion of ice: $\lambda=334 J/g$ and the specific heat capacity of water: $C_s=4.186 J/gC$

c. The equation to use will be $Q=m\lambda + m C_s \Delta T$ , where m is the mass of ice, $\lambda$ the latent heat of fusion of ice, Cs is the specific heat capacity of water and $\Delta T$ the increase in temperature

d. The energy is being absorbed by the ice, at first to break the bonds between the molecules of ice and to cause the melting of ice, and then to increase the temperature of the water

e. The amount of energy being transferred is

$Q=m\lambda +m C_s \Delta T=(156.3 g)(334 J/g)+(156.3 g)(4.186 J/gC)(56.232^{\circ}C-0^{\circ}C)=8.9\cdot 10^4 J=89 kJ$

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3 years ago

Select the correct answer.<br> Which type of energy is thermal energy a form of

elena-s [515]

Kinetic energy. thermal energy (a low form of energy ) is a form of kinetic energy as it is produced as a result of motion of particles either if they vibrate at their position or they move along longer paths. Motion produces friction or resistance which leads to excitation and thus the heat is produced. The higher the motion of the particles, the higher would be the thermal energy.

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3 years ago

Your cousin Freddy is about to start a new job as the manager of a convenience store. He knows you are taking a business course,

Marrrta [24]

The most important managerial skill Freddy needs to have is business acumen because it will improve his business instincts and allow him to guide him team to where they can have the most impact.

<h3>What is managerial skill?</h3>

Managerial skills are the knowledge and ability of the individuals in a managerial position to fulfil some specific management activities or tasks.

<h3>Managerial skills for convenience store</h3>

The most sought-after qualifications in a Convenience Store Manager are;

business acumen,
leadership,
organization,
good communication
networking skills, and
sales orientation

Thus, the most important managerial skill Freddy needs to have is business acumen because it will improve his business instincts and allow him to guide him team to where they can have the most impact.

Learn more about managerial skills here: brainly.com/question/28072629

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1 year ago