Answer:
Explanation:
The internal energy of any material is calculated as the sum of kinetic and potential energy of randomly distributed molecules.
This energy depends on temperature as well, if the temperature will increase the randomness will also increase hence will be the internal energy.
If any work is done on the system, then also the internal energy of the system is increased.
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3.europa
4.ganymede
5.triton
6.titan
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c. gets warmer.
b. gets colder.
d. turns to ice. Please select the best answer from the choices provided A B C D
Answer: Option (b) is the correct answer.
Explanation:
Density means the degree of compactness, that is, when particles of an object or substance are closer to each other then it is said that density of object is high.
Therefore, when ocean water gets colder then particles of water will gain potential energy and thus they will come closer to each other. Hence, there will be increase in density of ocean water when it gets colder.
gravity dwn, your hand up and equal to grav
When you hold a book at rest, two forces act upon it: the downward gravitational force exerted by the Earth represented as -14ĵ N and the upward force exerted by your hand that equals 14 N, balancing out the weight of the book. These forces cancel each other out, keeping the book at rest as per Newton's Second Law.
When you hold a book at rest in your hand, two primary forces are acting upon it. These are the gravitational force, which is the book's weight pulling it downwards, and the force exerted by your hand, pushing upwards against the book. The downward gravitational force is caused by the earth's mass attracting the book's mass. This force is represented as -14ĵ N in physics. The force exerted by your hand counters this gravitational pull, allowing the book to remain at rest in your hand.
By Newton's second law, since the book is at rest, the net force acting on the book is zero. Meaning, the gravitational force and the force exerted by your hand cancel each other out. This is represented as: FPH + FEH = 0, where FPH is the force exerted by your hand and FEH is the force exerted by the Earth. With proper calculation, the force exerted by your hand on the book equals 14 N in the upward direction, counteracting the book's weight.
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b) Both heat capacity and specific heat account for mass.
c) Neither specific heat nor heat capacity accounts for mass.
d) Only specific heat accounts for mass.
2. Which of the following factors is not used in calculating the specific heat of a substance?
a) mass
b) temperature change
c) heat required for a temperature change
d) melting point
3. The amount of heat needed to raise 250 g of a substance by 15 K is 2,930 J. What is the specific heat of the substance ?
a) 0.78
b) 11,000
c) 780
d) 1.1 × 10^7
4. If 50 g of liquid water [C = 4,180 J/(kgK)] changes temperature in a calorimeter from 298 K to 348 K, then how much heat is transferred?
a) 10.5 J
b) 10.5 kJ
c) 72.7 J
d) 100 kJ