Answer:absorbs and emits electromagnetic radiation at all wavelengths
Explanation:
A blackbody is a believed to be a perfect absorber and reflector of radiation. Blackbody, in physics, refers to a surface that absorbs all radiant energy that falls on it. It is supposed that because incident visible light will be absorbed rather than reflected, the surface will appear black.
The correct answer is C. Honesty regulated by a person’s sense of right and wrong.
Explanation:
Integrity is a personal quality that encompasses moral and ethical correctness that allows an individual to be honest and behave appropriately in different situations and make decisions. This quality is closely related to morals and ethics because these two factors define what is right or wrong, and therefore determine the correct behaviors. Moreover, these factors might vary with the cultural context; for example, if culture emphasizes the importance of respecting the elderly any form of attack to this population would be considered as opposite to integrity. According to this, integrity is "Honesty regulated by a person’s sense of right and wrong."
<h2>Right answer: a number and a unit</h2>
The measurement consists in <em>comparing a selected pattern with the object or phenomenon whose physical magnitude is going to be measured, to find out how many times the pattern is contained in that magnitude.</em> That is, it is about identifying or quantifying a particular characteristic or aspect of a particular object or construct.
Now, a well done measurement has two parts:
-The number gives us information about the quantity of the measurement, or in other words, the magnitude of the measurement and its precision.
-The units gives us information about the property that is being measured. This is quite important, because a measurement or result with no units is useless.
Note the units may be expressed with letter or symbols, depending on what we are measuring.
Answer:
The ball took 0.4 seconds
Explanation:
» From the second newton's equation of motion.
- s is displacement, s = 80cm, s = 0.8 meters
- u is initial velocity, u = 0 [ from rest ]
- g is 10 m/s²
Answer:
17.27m/s
Explanation:
M1U1 + M2U2 = (M1+M2)V
(900x15) + (750 x 20) = (900+750)V
13500+15000 = (1650)V
28500 = 1650v
V = 28500/1650 = 17.27m/s
V = 17.27m/s
