Answer:
moment of inertia of sphere 2 is 32 times the moment of inertia of sphere 1
Explanation:
The moment of inertia of a solid sphere about its axis is
where
M is the mass of the sphere
R is the radius of the sphere
The mass of the sphere can be rewritten as
where
is the density
is the volume of the sphere
So the moment of inertia becomes
Calling R the radius of sphere 1, the moment of inertia of sphere 1 is
where is the density of steel, since the sphere is made of steel
Sphere 2 has twice the radius of sphere 1, so
R' = 2R
and so its moment of inertia is
So, the moment of inertia of sphere 2 is 4 times the moment of inertia of sphere 1.
The scientific question can be supported by evidence that must be true of the possible answers to a scientific question. Option D is correct,
<h3>What is a Scientific hypothesis?</h3>
A scientific hypothesis must meet two criteria, A scientific hypothesis must be testable, and a scientific hypothesis must be falsifiable The basic idea of a hypothesis is that there is no predetermined outcome.
For a solution to be termed a scientific hypothesis, it has to be an idea that can be supported or refuted through carefully crafted experimentation or observation.
Only scientific questions may be answered by scientific activity. The design of the research is also influenced by scientific issues.
The scientific question can be supported by evidence that must be true of the possible answers to a scientific question.
They are accurate regarding the scientific question and can be substantiated by proof.
Hence option D is correct.
To learn more about the hypotheses refer to the link ;
https://brainly.in/question/1769011
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Answer:
B
Large mountains ranges will form
Explanation:
Answer:
t=20s
Explanation:
To solve this problem we must apply the first law of thermodynamics, which indicates that the energy that enters a system is the same that must come out, resulting in the following equation
For this problem we will assume that the water is in a liquid state, since it is a domestic refrigerator
q=m.cp.(T2-T1)
q=heat
m=mass of water =600g=0.6Kg
cp=
specific heat of water=4186J/kgK
T2=temperature in state 2=20°C
T1=temperature in state 1=0°C
solving:
q=(0.6)(4186)(20-0)=50232J
A refrigerator is a device that allows heat to be removed to an enclosure (Qin), by means of the input of an electrical energy (W) and the heat output (Qout), the coefficient of performance COP, allows to know the ratio between the heat removed ( Qin) and the added electrical power (W), the equation for the COP is
To solve this exercise we must know the value of the heat removed to the water (Qin)
solving for Qin
Qin=(COP)(Win)
Qin=(5)(500W)=2500W
finally we remember that the definition of power is the ratio of work over time
w=work
p=power=500w
