Answer:
Explanation:
Physical development refers to the growth, physical and biological changes that happens in the humans body between birth and till they get to adolescence stage. There is development in brain, senses, they way they talk, physical appearance e.r.c.
Examples of these include, as humans grow, there is an increase in the way they interact with other people.
Babies tend to interact and learn new words even as their sense organs are been developed.
Cognitive development refers to how children develop in knowledge, skills, they way they think, their disposition and problem solving ability. These help children to think and understand their environment better.
Psychosocial development entails psychological and social development and it refers to how human personality is developed, acquiring social attitudes and skills from young age to adult. It entails how humans interact with their environment.
Moral development entails changes that occur in humans from childhood to adulthood by possesing the the skills and ability to know what is right and what is wrong i.e an understanding of morals behavior.
B. Ask a question - Hypothesize - Experiment - Analyze - Draw a conclusion
Explanation:
The scientific method is a systematic approach in which investigations are conducted in science.
It follows systematic manner;
- An observation in nature is made using the senses.
- Questions are then asked about such observations. This is the inquiry phase.
- A hypothesis is then formula to predict what might cause the observation.
- Experiments are then conducted
- The results are analyzed and a conclusion is drawn
learn more:
Experiments brainly.com/question/5096428
#learnwithBrainly
1 and 4 are tire.
2 and 3 are not.
Hi!
SI units are physical measurements which will be in the form of kilograms, second, kelvin, metres, etc.
Since kilograms measure the weight of an object, it is out. Miles and feet are not SI units, so they are also out. This only leaves one answer left!
Hopefully, this helps! =)
Answer:
Part a) ![\frac{5}{9}\ \frac{rev}{sec}](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B9%7D%5C%20%5Cfrac%7Brev%7D%7Bsec%7D)
Part b) ![\frac{9}{5}\ \frac{sec}{rev}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B5%7D%5C%20%5Cfrac%7Bsec%7D%7Brev%7D)
Explanation:
Part a) what is its frequency, in rev/s
we have that
An old-fashioned LP record rotates at 33 1/3 RPM
so
![33\frac{1}{3}\ \frac{rev}{min}](https://tex.z-dn.net/?f=33%5Cfrac%7B1%7D%7B3%7D%5C%20%5Cfrac%7Brev%7D%7Bmin%7D)
Convert mixed number to an improper fraction
![33\frac{1}{3}\ \frac{rev}{min}=\frac{33*3+1}{3}=\frac{100}{3}\ \frac{rev}{min}](https://tex.z-dn.net/?f=33%5Cfrac%7B1%7D%7B3%7D%5C%20%5Cfrac%7Brev%7D%7Bmin%7D%3D%5Cfrac%7B33%2A3%2B1%7D%7B3%7D%3D%5Cfrac%7B100%7D%7B3%7D%5C%20%5Cfrac%7Brev%7D%7Bmin%7D)
Remember that
![1\ min=60\ sec](https://tex.z-dn.net/?f=1%5C%20min%3D60%5C%20sec)
Convert rev/min to rev/sec
![\frac{100}{3}\ \frac{rev}{min}=\frac{100}{3}(\frac{1}{60})=\frac{100}{180}\ \frac{rev}{sec}](https://tex.z-dn.net/?f=%5Cfrac%7B100%7D%7B3%7D%5C%20%5Cfrac%7Brev%7D%7Bmin%7D%3D%5Cfrac%7B100%7D%7B3%7D%28%5Cfrac%7B1%7D%7B60%7D%29%3D%5Cfrac%7B100%7D%7B180%7D%5C%20%5Cfrac%7Brev%7D%7Bsec%7D)
Simplify
![\frac{5}{9}\ \frac{rev}{sec}](https://tex.z-dn.net/?f=%5Cfrac%7B5%7D%7B9%7D%5C%20%5Cfrac%7Brev%7D%7Bsec%7D)
Part b) what is it period, in seconds
we know that
The period is the reciprocal of the frequency
therefore
the frequency is
![\frac{9}{5}\ \frac{sec}{rev}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B5%7D%5C%20%5Cfrac%7Bsec%7D%7Brev%7D)