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zhuklara [117]
2 years ago
14

A cow has eaten 1500KJ of stored chemical energy in the form of food. 945KJ is exerted as waste products. 495kJ is used for resp

iration. How much of the original 1500kJ is stored as chemical energy in the tissues of the cow?
Physics
2 answers:
n200080 [17]2 years ago
7 0

We need Net Energy

\\ \rm\Rrightarrow E_{net}=1500-(945+495)

\\ \rm\Rrightarrow E_{net}=1500-1440

\\ \rm\Rrightarrow E_{net}=60kJ

defon2 years ago
3 0

Answer:

60

Explanation:

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tia_tia [17]

Answer:

(i) by carrying an extra load may increase your weight.

(ii) the height of the stairs also which is the distance you climb through.

Explanation:

Since,

Power= work done/time

work done = force * distance.

*weight is a force.

*the height of the stairs is the distance.

the time depends inversely on the power which means that when the time spent is high the power is reduced. And in this case, we're trying to increase the power.

5 0
3 years ago
A closed container initially holds 50 monatomic Aparticles that have a combined energy of 480 units. After 100 monatomic B parti
Molodets [167]

Answer:

"8 units" is the appropriate answer.

Explanation:

According to the question,

Throughout equilibrium all particles are of equivalent intensity, and as such the integrated platform's total energy has been uniformly divided across all individuals.

Now,

The total energy will be:

= 480+720

= 1200 \ units

The total number of particles will be:

= 50+100

= 150

hence,

Energy of each A particle or each B particle will be:

= \frac{1200}{150}

= 8 \ units

5 0
3 years ago
True or False. Facts are based on observations. *<br><br> True<br> False
nikdorinn [45]

Answer:

TRUE

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5 0
3 years ago
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A 75-kilogram hockey player is skating across the ice at a speed of 6.0 meters per second. What is the magnitude of the average
saveliy_v [14]

Answer:

(3) 690 N

Explanation:

Force: This is the product of mass and acceleration of a body. The S.I unit of force is Newton(N).

The formula for force is given as,

F = ma..................... Equation 1

Where F = force, m = mass, a = acceleration.

Also,

a = (v-u)/t................... Equation 2

Where v = Final velocity, u = initial velocity, t = time.

Given: u = 6.0 m/s, v = 0 m/s (bring to stop), t = 0.65 s.

Substitute into equation 2

a = (0-6)/0.65

a = -6/0.65

a = -9.23 m/s²

Also given: m = 75 kg

Substitute again into equation 1

F = 75(-9.23)

F = -692.25 N

The negative sign tells that the force oppose the motion of the player

F ≈ 690 N

Hence the right option is (3) 690 N

3 0
3 years ago
a light object and a heavy object have the same kinetic energy. which has the greater momentum? explain.
vodomira [7]

The kinetic energies of a light and a heavy body are equivalent. The momentum is greater for the light body.

<h3>What is momentum?</h3>

Momentum is characterized as the intensity of a body's motion. As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity.

As a result of its higher mass, a heavy object will move with more momentum. Only when the average speed of the heavy particles is lower than that of the light particles will the average kinetic energy of the light particles equal the average kinetic energy of the heavy particles.

At the same temperature and pressure, lighter gases will move more quickly than heavier ones. 0K on the Kelvin scale denotes that the particles are not moving.

To learn more about momentum refer to:

brainly.com/question/1042017

#SPJ4

5 0
2 years ago
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