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Sever21 [200]
2 years ago
9

Based on what you've learned about heat energy, explain the factors that would determine how quickly a piece of meat cooked on a

barbecue grill. Why would the amount of water in the meat affect the speed of cooking?
Physics
2 answers:
Law Incorporation [45]2 years ago
5 0

Answer and Explanation:

Heat is a form of energy. It is the total energy of a system associated to the the movement of its molecules or molecular motion.

It depends on various factors like enthalpy of the system, its pressure, temperature, etc.

In the case mentioned, the pace at which meat is cooked on a barbecue grill depends on the water content of the meat and the barbecue grill temperature.

The reason for the cooking speed being affected by amount of water in the is that meat heat energy required to remove the excess water for the proper cooking depends on the water content which if removed completely will result in uncooked meat.

The more the water content the more is the energy requirement to remove it.

bixtya [17]2 years ago
3 0

Answer:

Explanation:

Water has a very high specific heat capacity of about 4.186 J/C. This means that the more water that a piece of meat holds, the longer is takes to cook since the water requires more energy to remove from the meat.

The speed of cooking also depends on factors such as the thickness of the meat and the temperature of the grill. The thicker a piece of meat is, the longer it takes for the entire piece of meat to heat completely through. The higher the temperature of the grill, the quicker the heat energy spread throughout the meat.

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Can light cause the rubber to become solid? Why or why not? Does it matter what type of light she shines on the rubber?
ELEN [110]

Answer:

Yes, ultraviolet light can turn a rubber into solid due to prolong exposure.

Explanation:

A rubber is a material with an elastic property, causing it to be deform by an external force but takes its shape when the force is removed. Light is an electromagnetic wave which causes the sensation of vision. It transfers energy to a medium during propagation through the medium.

Generally, most light do not cause hardness of a rubber. But an ultraviolet light can cause rubber to become solid over a period of time. This is possible if there is a prolong exposure of the rubber, and because of the evaporation of volatiles in the polymer material. Ultraviolet light are known to cause a rubber to become solid.

8 0
2 years ago
The lowest point in Death Valley is 85.0 m below sea level. The summit of nearby Mt. Whitney has an elevation of 4420 m. What is
mestny [16]

Answer:

The change in gravitational potential energy of the hiker = 2869685 J

Explanation:

Potential Energy: This is the energy possessed by a body, due to its change in position in the gravitational field. The unit of potential energy is Joules (J)

From the question,

Change in gravitational potential energy = Energy of the hiker at the top of  Mt. Whitney - Energy of the hiker at the floor of Death valley.

ΔEp = mgh₂ - mgh₁

ΔEp = mg(h₂-h₁)........................... Equation 1

Where ΔEp =  change in Potential Energy of the hiker, m = mass of the hiker, g = acceleration due to gravity, h₁ = lowest point in Death valley, h₂ = Elevation of Mt. Whitney.

Given: m = 65.0 kg, h₁ = -85 m ( because is a valley), h₂ = 4420 m,

Constant: g = 9.8 m/s²

Note: The h₁ is negative because is below sea level.

Substituting into equation 1

ΔEp = 65×9.8×[4420-(-85)]

ΔEp = 637(4420+85)

ΔEp = 637(4505)

ΔEp = 2869685

ΔEp = 2869685 J.

Thus the change in gravitational potential energy of the hiker = 2869685 J

6 0
2 years ago
Hicham El Guerrouj of Morocco holds the world record in the 1500 m running race. He ran the final 400 m in a time of 51.9 s.
konstantin123 [22]

Answer: His average speed in mph over the last 400 m is 7.7 m/s.

Explanation:

Given: Hicham El Guerrouj of Morocco holds the world record in the 1500 m running race. He ran the final 400 m in a time of 51.9 s.

We know that , speed = \dfrac{distance}{time}

Here , distance = 400m and time = 51.9 s

Then, speed =  \dfrac{400}{51.9}\approx7.7\ m/s

Hence, his average speed in mph over the last 400 m is 7.7 m/s.

5 0
2 years ago
Ebo throws a ball into the air its velocity at the start is 18m/s at an angle of 37° to the ground. What is the range of the bal
NeTakaya
PLS help ASAP I DONT have time to answer this, it also detects if it’s right or wrong.
6 0
2 years ago
"As the Voyager spacecraft penetrated into the outer solar system, the illumination from the Sun declined. Relative to the situa
____ [38]

Answer:

\frac{I_{2}}{I_{1}} = 0.04

Explanation:

The intensity of a star noticed at a certain distance is inversely proportional to the square of distance. Then:

I_{1}\cdot r_{1}^{2} = I_{2}\cdot r_{2}^{2}

The intensity of the Sun in Jupiter relative to Earth is:

\frac{I_{2}}{I_{1}} = \frac{r_{1}^{2}}{r_{2}^{2}}

\frac{I_{2}}{I_{1}} = \left(\frac{1\,AU}{5.2\,AU} \right) ^{2}

\frac{I_{2}}{I_{1}} = 0.04

3 0
2 years ago
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