Answer:
water's high heat of vaporization
Explanation:
Water is a substance with a high heat of vaporization (2257 J/g). This means that 1 g of water evaporates, a large amount of heat is absorbed.
The mechanism of evaporation is used by the dog to cool their temperature, by panting. In fact, sweat accumulates on their tongue, then the molecules of water with higher kinetic energies evaporates, turning from liquid into gas, While doing so, they absorb a large amount of heat from the dog's body (thanks to the high heat of vaporization of water), allowing the animal to lower its temperature much efficiently.
Answer:
mass
Explanation:
As this is directly related to inertia. Inertia is the property of unit which resists the change of state of rest or motion
Answer:
placing it in the refrigerator
Answer:
1) Joule
2) kgm²/s²
3) 10%
Explanation:
Question 1)
Luminosity is defined as the total amount of energy released from an object in a unit amount of time.
This means Luminosity is the ratio of energy and time.
Unit of Energy is Joules and Unit of Time is seconds, so unit of Luminosity would be Joule per second or Watts.
So, from the given options, the unit which would be used in Luminosity calculations is Joule.
Question 2)
Work = Force x Distance
SI unit of Work is Joule
SI unit of Force is Newton or kgm/s²
SI unit of Distance is meter(m)
Unit of Work = Unit of Force x Unit of Distance
Joule = kgm/s² x m
Joule = kgm²/s²
This means, the correct description of joule in terms of SI base units is kgm²/s²
Question 3)
Value of gravitational constant from the experiment = Nm²/kg²
The accepted or actual value of the gravitational constant = Nm²/kg²
We need to calculate the percentage error. Percentage error is defined as:
Here, original value is the accepted value. Using the values in this formula, we get:
Thus, this means the percentage error in the calculation of gravitational constant was 10%.
Measure the distance between an object and the lens after using the lens to focus on it. The focal length is at this range.
<h3>How simple is it to determine a lens's focal length?</h3>
Focus a far-off object on a wall by adjusting the convex lens up and down along the scale. The picture that forms on the wall is very close to the lens' focus, and the metre scale can be used to read how far away the lens is from the image. This approximates the lens's focal length.
<h3>How do you calculate a concave lens's focal length?</h3>
The formula f=uv/u-v is used to get the focal length of the concave lens using the values of u and v.
Learn more about focal length here:
brainly.com/question/16188698
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