Answer: object B is negatively charged, object C is positively charged and object D is also positively charged
Explanation: since unlike charges attract and like charges repel, for object A which is positively charged and B to attract B must be negatively charged and then for B which is negatively charged and C to attract C must be positively charged and for C and D to repel they have to be of thesame charge which means D is positive as well.
It will take 21s for yhe alligator to crawl that distance. Reported answer contains 2 Significant Figures.
Answer:
C
Explanation:
There are two forces on the table: weight and normal force. Newton's second law:
∑F = ma
N - mg = 0
N = mg
N = (23.5 kg) (9.81 m/s²)
N = 230 N
The are called alakali earth metals.
The energy found in one photon of visible light if the wavelength is 589 nm is, 3.37*10^-19J.
To find the answer, we have to know more about the energy of photon.
<h3>What is the energy of photon?</h3>
- We have the expression of energy of photon as,
where, c is the speed of light and h is the plank's constant.
- It is given in question that, the wavelength is 589 nm.
- Thus, the energy will be,
Thus, we can conclude that, the energy found in one photon of visible light if the wavelength is 589 nm is 3.37*10^-19J.
Learn more about the energy of photon here:
brainly.com/question/3584036
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