Physics, 17.03.2020 05:11 missfuture2020p5umxt

A horse whose mass is M gallops at constant speed v up a long hill whose vertical height is h, taking an amount of time t to reach the top. The horse's hooves do not slip on the rocky ground, so the work done by the force of the ground on the hooves is zero (no displacement of the force). When the horse started running, its temperature rose quickly to a point at which from then on, heat transferred from the horse to the air keeps the horse's temperature constant.(a) First consider the horse as the system of interest. In the initial state the horse is already moving at speed v. In the final state the horse is at the top of the hill, still moving at speed v. Write out the energy principle?Esys = W + Qfor the system of the horse alone. The terms on the left hand side should include only energy changes for the system, while the terms on the right hand side should relate to the surroundings (everything else).Which of the following terms are equal to 0?1W?Echemical, horse?(mhorsec2)?Khorse?Ethermal, horseQ

Answers: 3

Show answers

Answers

A horse whose mass is M gallops at constant speed v up a long hill whose vertical height is h, taking an amount of time t to reach the top. The horse's hooves do not slip on the rocky ground, so the work done by the force of the ground on the hooves is zero. Thus, the energy principle for the system can is: $\mathbf{\Delta E_{horse} = \Delta E_{chemical} + \Delta E_{thermal}+ \Delta K}$ and the following terms that are equal to 0 are $\mathbf{\Delta E_{thermal \ horse } =0 }$ and $\mathbf{\Delta K_{horse}=0}$

From the given information, we are to consider the horse to be the system. Since the horse is regarded as the system, then the energies flowing in the system are:

chemical energy (provided that the horse happens to be a living organism)thermal energy (as a result of variations in the horse's temperature)kinetic energy (due to variation of the horse's speed)

In the system, we cannot assert that the horse possesses gravitational potential energy. This is because, for a system to have gravitational potential energy, there needs to be the existence of two objects for the gravitational attraction to coexist within the system.

Hence, the energy principle for the system can be computed as:

$\mathbf{\Delta H_{horse} = \Delta E_{chemical}+ \Delta E_{thermal}+\Delta \ K}$

Recall from the question that, the horse possesses the ability to keep and maintain its temperature constant through heat transfer with the surrounding air.

Thus, the $\mathbf{\Delta E_{thermal }=0}$

However, since the speed is also said to be constant;

$\mathbf{\Delta K = 0 }$

Now, from the given options.

$\mathbf{\Delta E_{thermal.horse} = 0 \ and \ \Delta K_{horse} = 0}}$

Therefore, we can conclude that the total change in the horse energy is brought about by the changes in its chemical energy.

Learn more about the energy principle here:

link

Answer from: fluffypuppies24

The answer to the question is;

the following terms on the left hand side of the energy equation which are changes in the energy for the system are equal to 0;

Δ $E_{Thermal}$ = 0Δ $m_{horse}c^{2}$ = 0ΔK $_{horse}$ = 0.

Explanation:

To solve the question we note that the final form is

E $_{sys}$ = W +Q

Since we are required to write out the system for only the hose, we have

Δ $E_{System}$ = Δ $m_{horse}c^{2}$ + ΔK $_{horse}$ + Δ $E_{Chemical}$ + Δ $E_{Thermal}$ = W + Q = -M·g·h - Q Abs

Since we have that the horses temperature is constant, we have

Δ $E_{Thermal}$ = 0

Again the speed v of the horse remain constant ∴ Δ $m_{horse}c^{2}$ =0

Also ΔK $_{horse}$ = 0 as the horse is moving at constant speed =0

That is the following terms are equal to 0

Δ $E_{Thermal}$ , Δ $m_{horse}c^{2}$ , ΔK $_{horse}$ .

Answer from: Quest

in physics zero. in muscle fatigue could be high

Answer from: Quest

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

Another question on Physics

Physics, 22.06.2019 05:50

Give your knowledge of these things in your paper, you will compare and contrast analog and digital signals to determine which is more reliable for encoding and transmitting information. you’ll compare these features: signal shape numerical values for signal measurements amount of data that can be transmitted energy requirements privacy and security (ability of the signal to be encoded in a secret code) clarity of signal in the space provided, write down what you already know about any of these features. if you’re not sure, write down questions you might have about the features.

Answers: 3

Answer

Physics, 22.06.2019 07:00

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Answers: 3

Answer

Physics, 22.06.2019 10:00

Which subatomic particle has a negative charge

Answers: 2

Answer

Physics, 22.06.2019 12:00

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Answers: 2

Answer

You know the right answer?

A horse whose mass is M gallops at constant speed v up a long hill whose vertical height is h, takin...