η = 13.8 lm/W. The luminous efficacy of a incandescent lightbulb that produces 830 lumens and consumed a power of 60 W is 13.8 lm/W.
The luminous efficacy of a light source is the relationship between the luminous flux (in lumens) emitted by a light source and the power (in watts). The luminous efficacy of a light source or luminous efficiency measures the part of electrical energy that is used to illuminate and is obtained by dividing the luminous flux emitted by the electrical power consumed. Luminous efficiency is expressed in lumens per watt (lm / W). It is given by the relation:
η = F / P. Where F is the luminous flux, and P is the power consumed by the light source.
The efficacy of a 60.0 W incandescent lightbulb that produces 830 lm is:
η = 830 lm / 60 W
η = 13.8 lm/W
She presents symptoms of <u>disorganized schizophrenia</u> since her behavior is chaotic and is not organized around themes that are maintained over time.
<h2>What is disorganized schizophrenia?</h2>
Disorganized schizophrenia is the disease expressed through hallucinations and delusions, among the negative symptoms we find cognitive, behavioral and emotional deficits of different types.
<h3>Symptoms of disorganized schizophrenia</h3>
- The person shows disorganization in his emotional states, in what he says and / or in his way of moving.
- The person presents language disorganization that affects thinking and cognitive processes.
Therefore, we can conclude that the presence of inappropriate emotional expressions, disorganized language, and motivational deficits are symptoms of disorganized schizophrenia.
Learn more about schizophrenia here: brainly.com/question/15401779
Black holes.
Although black holes don't have surface they are the only known object that has gravity that not even light can escape it.
c. Energy and work
Explanation:
Energy and work done have the same unit of measurement. The unit of energy and work done is taken as the Joules(J).
- Energy is defined as the ability to do work. Energy is of two main forms.
- Potential energy is the energy at rest while kinetic energy is due to the motion of a body.
- All forms of quantitative energy calculations are expressed as the joules.
- Work done is the force applied to move a body through a particular distance.
Learn more:
Work done brainly.com/question/9100769
Energy brainly.com/question/4997571
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The distance covered in one orbit is equal to the circumference of earth.
Given that radius of earth is 3959 miles.
Circumference of earth= 2πr = 2*3.14*3959 = 24875.13 miles
Speed is 26,000 miles per hour.
Since, Velocity= Distance/Time
Time= Distance/Velocity = 24875.13/26000
Time = 0.9567 hours
Therefore,
Average hour per orbit is 0.957 approximately.