The peak wavelength of Betelgeuse is 828 nm
Explanation:
The relationship between surface temperature and peak wavelength of a star is given by Wien's displacement law:
where
is the peak wavelength
T is the surface temperature
is Wien's constant
For Betelgeuse, the surface temperature is approximately
T = 3500 K
Therefore, its peak wavelength is:
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Answer:
his is an example of the transformation of gravitational potential energy into kinetic energy
Explanation:
The game of juggling bowling is a clear example of the conservation of mechanical energy,
when the bolus is in the upper part of the path mechanical energy is potential energy; As this energy descends, it becomes kinetic energy where the lowest part of the trajectory, just before touching the hand, is totally kinetic.
At the moment of touching the hand, a relationship is applied that reverses the value of the speed, that is, now it is ascending and the cycle repeats.
Therefore this is an example of the transformation of gravitational potential energy into kinetic energy
Answer:
1. Tienes 1 kg de fruta.
2. Queda por recorrer 1/4 km.
3. Ambos pesan lo mismo.
Explanation:
1. Tienes 1/2 kg y cuando te doy 1/4 te queda:
Ahora cuando te doy 3/4 kg te queda en total:
Por lo tanto, tienes 1 kg de fruta al final.
2. Si falta por recorrer la mitad de la mitad, tenemos:
Entonces, queda por recorrer 1/4 km.
3. El peso (P) del hierro es:
Y el peso de la paja es:
Por lo tanto, ambos pesan lo mismo.
Espero que te sea de utilidad!
Answer:
Option A is correct.
Inheritance, superclass, subclass
A new class of objects can be created conveniently by **inheritance**; the new class (called the **superclass**) starts with the characteristics of an existing class (called the **subclass**), possibly customizing them and adding unique characteristics of its own.
Explanation:
A class is a term in object oriented programming that is extensible program code used to create, name and implement what you want the objects to do.
Inheritance is used to describe the making of new classes from already existing classes. The general properties of the old classes remain in the new classes created from them.
Hence, the new classes (because they're usually an improvement on the old classes as they hold on to the wanted properties of the old classes and additional great ones are added or modified) are called superclasses and the old, already existing ones are called subclasses.
Answer:
The efficiency of each cycle of a heat engine is 30 %.
Explanation:
Given that,
Heat absorbed by a heat engine, Q = 64 kcal
Heat exhaust by a heat engine, Q' = 42 kcal
We need to find the efficiency of each cycle. The efficiency of heat engine is defined as the ratio of work output to the energy supplied. It is given by :
or
So, the efficiency of each cycle of a heat engine is 30 %. Hence, this is the required solution.
