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Matematika Kelas 5

salam,,,

 

sy punya ponakan sd klas 5 dia sedang bingung dengan soal soal matematika pecahan penjumlahan dan pengurangan, sementara sy tidak bisa membantunya karena sy jg tidak tahu. mohon bantuannya bagaimana mengerjakannya, soal2nya adl:

5 1/4- 1 2/3- 2 1/5=

Untuk menjawab sosal Adik, pecahan-pecahan tsb diubah menjadi pecahan biasa kemudian disamakan penyebutnya.

5 1/4- 1 2/3- 2 1/5 = 21/4 - 5/3 - 11/5

                            = 315/60 - 100/60 - 132/60

                            = 83/60

vina

IPA Kelas 9

Minta tolong dijelaskan materi tentang zat adiktif dan psikotropika beserta efek-efeknya. Terimakasih banyak.

ZAT ADIKTIF

Zat adiktif adalah bahan makanan atau yang apabila dikonsumsi oleh manusia dapat menyebabkan ketagihan.

Yang termasuk benda-benda adiktif antara lain rokok dan minuman beralkohol.

ROKOK

Mengandung lebih dari 4.000 macam zat, antara lain:

• Tar, berupa cairan berwarna cokelat. Dapat merusak paru-paru, menghambat sirkulasi oksigen dalam darah,menyebabkan kanker, dan gangguan pernapasan seperti bronkitis.
• Nikotin, bersifat racun. Pada rokok, inilah bahan yang bersifat adiktif. Dampak dari penggunaan nikotin antara lain kerusakan jaringan otak dan hati,membuat bagian tubuh yang terpapar menjadi kuning, menaikkan tekanan darah, dan memacu kerja jantung.
• Karbon monoksida, bersifat racun, tidak berwarna maupun berbau. Mengikat hemoglobin lebih kuat daripada oksigen, sehingga tubuh berpotensi kekurangan oksigen.

Dampak negatif dari rokok antara lain:

• Kanker paru-paru
• Penyakit jantung
• Bronkitis
• dll.

MINUMAN KERAS

Minuman keras adalah cairan jernih, tidak berwarna, berasa pahit, dan bersifat memabukkan. Setiap minuman keras mengandung alkohol. Minuman keras digolongkan berdasarkan kandungan alkoholnya. Contohnya:

• Bir, mengandung alkohol sebesar 3-7%.
• Anggur, mengandung alkohol sebesar 12-14%.
• Gin, rum, wiski, dan brandi, mengandung alkohol sebesar 35%.

Dampak negatif minuman keras antara lain:

• Sirosis hati
• Gastritis
• Kanker mulut, tenggorokan, dan esofagus
• Hilangnya sejumlah jaringan otot dalam lengan dan kaki, bahkan dapat menyebabkan pelunakan pada otot jantung
• Rusaknya pankreas
• Besarnya resiko terkena infeksi, pneumonia, dan memar
• Karena sifatnya depresan, dapat menidurkan berbagai bagian otak dan sistem saraf.
• Kematian tak terduga jika alkohol diminum bersama dengan obat lain

Karena dapat menyebabkan tidurnya berbagai bagian otak dan sistem saraf, maka dapat terjadi gejala antara lain:

• Kelainan psikologis-alkoholik
• gejala hilang akal secara total
• paranoia alkoholik (mudah curiga, cemburu, suka menuduh, dan sering terganggu dalam mengekspresikan kejadian-kejadian di sekitarnya dan mungkin mengalami keadaan jiwa yang tidak stabil.
• sindrom Vernicke (penyakit kurang gizi pada pecandu alkohol, terutama kelompok vitamin B. Ditandai dengan meningkatnya frekuensi mengigau, bingung, takut, sulit berjalan, dan hilang ingatan.)
• sindrom Karsakoff (kelainan yang menyebabkan otak rusak sehingga penderita tidak dapat berorientasi terhadap waktu dan tempat serta merasa lemah dan geli pada lengan dan kaki karena saraf yang menuju daerah ini dipengaruhi.)
• Delirium tremens (perubahan kejiwaan yang sangat serius akibat konsumsi minuman keras dalam jangka waktu yang terlalu lama dan penarikan diri akibat ketagihan alkohol secara psikologis.)

ZAT PSIKOTROPIKA

Zat psikotropika adalah zat atau bahan baik alami maupun sintetis yang dapat mempengaruhi pikiran atau sistem saraf.

Ada 5 golongan zat psikotropika, yaitu:

Obat Psikoaktif

Adalah obat yang digunakan dalam ilmu kedokteran jiwa untuk mengobati penyakit mental dan saraf. Jika ada orang yang ketagihan obat jenis ini, maka dia akan menginginkan dosis yang semakin lama semakin besar. Konsumsi terus-menerus dapat menyebabkan kerusakan permanen pada otak dan dapat menyebabkan kematian.

Depresan

Adalah obat yang berfungsi untuk menenangkan orang yang sedang depresi. Obat-obat yang termasuk depresan adalah opiat (yang termasuk alami), sementara itu yang sintetis antara lain:

• Heroin, memberikan sensasi, seperti menghilangkan rasa sakit, yang menyebabkan pengguna mengalami rasa senang yang luar biasa. Penggunaannya dengan cara disuntikkan. Pada pecandu, jika tidak menggunakan heroin setiap 4-6 jam maka akan merasakan mual, muntah-muntah, nyeri di lambung, keringat dingin, dan demam. Jika overdosis dapat menyebabkan kematian.
• Morfin, menyebabkan rasa lesu, ngantuk, kebingungan, perasaan bahagia yang berlebihan, dan gangguan sistem pernapasan.
• Metadon, merupakan obat kedua yang paling banyak menyebabkan kecanduan setelah heroin. Diberikan kepada pengguna heroin yang sedng diobati untuk mengurangi kerasnya gejala-gejala pecandu heroin yang sedang diobati.
• Barbiturat (pil tidur), memberikan efek menenangkan dan tidur lelap. Orang yang ketagihan akan mengalami gejala seperti demam dan kejang-kejang. Konsumsi terus-menerus dapat menyebabkan kematian.

Stimulan

Adalah zat yang dapat meningkatkan fungsi berbagai organ tubuh melalui efeknya terhadap sistem saraf pusat. Dapat membuat orang lebih aktif, maksudnya mempercepat reaksi badan dan memberikan perasaan tersedianya tenaga yang tidak terbatas, serta dapat juga meningkatkan denyut jantung dan tekanan darah. Contohnya adalah amfetamin, dapat menghilangkan rasa kantuk, jika dipakai berlebihan menimbulkan efek psikotik. Jika dipakai saat kelelahan yang berlebihan dapat menimbulkan halusinasi dan paranoia.

Halusinogen

Adalah zat yang dapat menimbulkan halusinasi bagi si pemakai. Contohnya LSD (Lisergic Acid Diethylamide), dapat menyebabkan paranoia yang mengarah pada perilaku agresif. Contoh lain adalah STP, DMT, meskalin, dan psilosibin.

Euforia

Adalah obat yang dapat menyebabkan perasaan nyaman atau gembira. Contohnya adalah mariyuana dan ganja, menyebabkan orang mabuk dan kacau. Jika dikonsumsi saat tenang, terasa nikmat, namun jika dalam kondisi gelisah, dapat menyebabkan panik yang berlebihan.

CIRI-CIRI PECANDU NAPZA

(narkotika, psikotropika, dan zat adiktif)

Ciri-ciri fisik:

1. mata merah
2. mulut kering
3. bibir berwarna kecoklatan
4. perilakunya tidak wajar
5. bicaranya kacau
6. daya ingatnya menurun

Ciri-ciri dini pada anak yang kecanduan:

1. anak menjadi pemurung dan penyendiri
2. wajah anak pucat dan kuyu
3. terdapat bau aneh yang tidak biasa di dalam kamar
4. matanya berair dan tangannya gemetar
5. napasnya tersengal dan susah tidur
6. badannya lesu dan selalu gelisah
7. mudah tersinggung, marah, dan suka menentang orang tua
8. suka membolos dengan alasan tidak jelas

Sumber:

Tim IPA SMP/MTs. 2007. Ilmu Pengetahuan Alam 2. Jakarta : PT. Galaxy Puspa Mega.

TOP URGENT

Bahasa Inggris Kelas 12

Pak/Bu, saya sudah melihat website yang Bapak/Ibu anjurkan mengenai perbedaan Hortatory & Analytical Exposition. Tetapi tidak ada penjelasan mengenai tujuan dari teks Hortatory & Analytical nya. Mohon Bapak/Ibu bersedia memberitahu saya mana jawaban untuk bacaan ini yg benar. Yg A / B? Terima kasih banyak ya, Pak/Bu.

What is the communicative purpose of the above text?

a.   to persuade the readers that a certain things is the case

b.   to state the points of view of the case

c.   to explain the process of certain formation

d.   to describe the way things are

e.   to share experiences about the case

Smoking is a bad habit that is very hard to break. Smokers are everywhere. Many people smoke just to socialize, but many others are too addicted to quit.

           A cigarette is like a toxin hypermarket. You can find many kinds of toxin in it: acetone, carbon monoxide, tar, arsenic, ammonia, hydrogen cyanide, and toluene. The tar itself contains more than 43 substances that can cause cancer. Scientists say that when we are smoking, we put more than 4,000 kinds of toxic materials into our body.

            However, many smokers believed that a cigarette with low tar is less dangerous. And so is a filtered cigarette. But the problem is one cigarette is never enough for addicted smokers.       

            Another myth about smoking is that it cannot only make them awake but also raise their inspiration. This is contrary to the findings of a research in California which show that smokers’ ability to think is lower than of non-smokers.

            Smoking is indeed a serious social problem in our country. The government keeps reminding that smoking is dangerous, not only for smokers themselves, but also for other people in the surroundings (passive smokers). But the warnings do not seem to get any response.

A.

silakan lihat juga www.understatext.blogspot.com

TOP URGENT

Bahasa Inggris Kelas 12

It’s stated that there were many Malaysians whose ancestors came from Ponorogo join in woodcarving class in Jepara in the mid 1970s. It means ………

a.   the ancestors of people from Ponorogo were from Malay.

b.   many people from Ponorogo have ability to carve up to now.

c.   many people from Jepara lived in Ponorogo in 1970s.

d.   At the end of June, 1970s, many Malaysians studied woodcarving.

e.   Ponorogo’s ancestors took part in woodcarving class in Jepara.

Jawaban yg benar itu yg A ya, Pak/Bu? Mohon penjelasannya. 

D.At the end of June, 1970s, many Malaysians studied woodcarving

Bahasa Inggris Kelas 10

 generic structure of text descriptive and the part of each structure

siakan klik www.understandingtext.blogspot.com

selamat belajar

Bahasa Inggris Kelas 9

Wayang is an Indonesian and Malay word for puppet. The term refers to kinds of puppet theater, but sometimes it refers to the puppet itself. “Bayang”, the Javanese word for shadow or imagination, also connotes “spirit”. Performances of shadow puppet theater are accompanied by gamelan in Java and by gender wayang in Bali.

            Wayang is a generic term denoting traditional theater in Indonesia. There is no evidence that wayang existed before Hinduism came to Southeast Asia. The first record of a wayang performance is from an inscription dated 930 CE which says “si Galigi mawayang” or “Sir Galigi played wayang”. Since that time, it seems certain features of traditional puppet theater remained. Hinduism arrived in Indonesia from India even before the Christian era and was slowly adopted as the local belief system. Sanskrit became the literary and court language of Java and later of Bali. The Hindus changed the Wayang (as did the Muslims, later) to spread their religion, mostly by stories from the Mahabharata or the Ramayana.

Pertanyaan2nya adalah:

1.   Where is Wayang Kulit from?

      a.   Southeast Asia

      b.   India

      c.   Java

      d.   Bali

      Yg betul yg B / C ya, Pak/Bu? Mohon dijelaskan.2.   After reading this story, we can learn that ………

      a.   wayang kulit is the spirit of life

      b.   wayang kulit is a media of educating people

      c.   wayang kulit is traditional puppet theater

      d.   wayang kulit is a generic term denoting traditional theater

      Yg betul yg D ya, Pak/Bu?  

Wayang is an Indonesian and Malay word for puppet. The term refers to kinds of puppet theater, but sometimes it refers to the puppet itself. “Bayang”, the Javanese word for shadow or imagination, also connotes “spirit”. Performances of shadow puppet theater are accompanied by gamelan in Java and by gender wayang in Bali.             Wayang is a generic term denoting traditional theater in Indonesia. There is no evidence that wayang existed before Hinduism came to Southeast Asia. The first record of a wayang performance is from an inscription dated 930 CE which says “si Galigi mawayang” or “Sir Galigi played wayang”. Since that time, it seems certain features of traditional puppet theater remained. Hinduism arrived in Indonesia from India even before the Christian era and was slowly adopted as the local belief system. Sanskrit became the literary and court language of Java and later of Bali. The Hindus changed the Wayang (as did the Muslims, later) to spread their religion, mostly by stories from the Mahabharata or the Ramayana.Pertanyaan2nya adalah:1.   Where is Wayang Kulit from?      a.   Southeast Asia      b.   India      c.   Java      d.   Bali      Yg betul yg B / C ya, Pak/Bu? Mohon dijelaskan. Jawaban yang benar adalah B.Kalimat ‘There is no evidence that wayang existed before Hinduism came to Southeast Asia.’ menunjukkan bahwa wayang belum ada sebelum Hindu masuk. 2.   After reading this story, we can conclude that ………       a.   wayang kulit is the spirit of life      b.   wayang kulit is a media of educating people      c.   wayang kulit is traditional puppet theater      d.   wayang kulit is a generic term denoting traditional theater      Yg betul D ya, Pak/Bu?    Jawab:

Sebenarnya kami tidak yakin dengan apa maksud pertanyaan dengan pilihan jawaban yang ada. Bila yang dimaksud adalah gambaran umum tentang teks tersebut, maka jawaban yang benar adalah C.

Bahasa Inggris Kelas 9

Enjoy this exclusive offer.

What does the word “exclusive” mean?

a.   extremely good

b.   very fashionable

c.   private and expensive

d.   limited and not shared

Yg betul A, B / D ya, Pak/Bu? Mohon dijelaskan.

      It must have been about 10 p.m. when I returned home. I tried to wake up my mother by ringing the door-bell, but she was fast asleep, so I got a ladder from the shed, ……… it against the wall, and began climbing towards the bedroom window.

a.   hit

b.   put

c.   laid

d.   took

Yg betul B / C ya, Pak/Bu? Mohon dijelaskan. 

 

Enjoy this exclusive offer.What does the word “exclusive” mean?a.   extremely goodb.   very fashionablec.   private and expensived.   limited and not shared Yg betul A, B / D ya, Pak/Bu? Mohon dijelaskan.Maaf teks anda kurang memberikan konteks yang jelas karena kata ‘exclusive’ bisa berarti yang berbeda-beda tergantung konteksnya.      It must have been about 10 p.m. when I returned home. I tried to wake up my mother by ringing the door-bell, but she was fast asleep, so I got a ladder from the shed, ……… it against the wall, and began climbing towards the bedroom window.a.   hitb.   putc.   laidd.   tookYg betul B / C ya, Pak/Bu? Mohon dijelaskan.   

Jawaban yang benar adalah B.

TOP URGENT

Bahasa Inggris Kelas 11

The term globalization is now the objective reality of this world. Within the revolutionary developments of Information Technology (IT), such as DVDs, PDAs, cell phones and other electronic devices, the world turn to be a “huge” village. We can get connected to anybody across the world with less money.

            However, it is important to realize that the available facilities in our life are in fact a double-edged sword. On the one hand, if we make use of them wisely, we can take fully advantage of them. On the other hand, we can easily misuse them well.

            One good example is the use of Microsoft Encarta Encyclopedia for our learning. This encyclopedia is commonly written in a single DVD, which consists of a huge amount of information, can be a wonderful source of learning. Simply by typing the keyboard on “search”, we are provided with various readings, recordings and a series of pictures.

            However some students might be tempted to misuse the encyclopedia. Instead of reading and taking advantage of much information available, some students plagiarized from the encyclopedia. They did not read by critically thinking, analyzing and synthesizing the ideas. The just copies and pasted the phrases and sentences from the encyclopedia without knowledge the source. They claimed that they writing pieces were theirs. As we know that taking others work without acknowledging the source is crime.

            In summary, it is important to have long lasting effect of learning, and the genuine passion for learning is needed.

Pertanyaan2nya adalah:

2.   What is the text about?

      a.   How the encyclopedia can easily be found

      b.   The advantages and disadvantages of the use of IT for learning

      c.   Students who like to copy and paste the Microsoft Encarta Encyclopedia.

      d.   The reason why the information technology is necessary for                   students to learn

      e.   The benefits of IT, especially Microsoft Encarta Encyclopedia               for learning.

      Jawaban yg benar itu yg B, D / E ya, Pak/Bu? Mohon             penjelasannya.

3.   According to the last paragraph, the writer wants ………

      a.   To retell the term of globalization

      b.   To describe the objective reality of the world

      c.   To explain the development of IT

      d.   To inform the readers the history of electronic devices

      e.   To propose the necessity to have genuine passion for learning

      Apakah jawaban yg benar itu yg E ya, Pak/Bu?

4.   “In summary, it is important to have long lasting effect of learning,     and the genuine passion for learning is needed.”

      The statement shows that ……….

      a.   real learning can neglected

      b.   it is necessary to learn from encyclopedia

      c.   the interest for learning needs to be improved

      d.   the strong feeling of learning must be real or true

      e.   real learning doesn’t mean having long lasting

      Jawaban yg benar itu yg C / D ya, Pak/Bu? Apa yg dimaksud             dng “genuince passion for learning?” 

Sudah terjawab. terimakasih
Tri Raharjo, S.Pd 20 Januari 2010 0:0

TOP URGENT

Bahasa Inggris Kelas 12

HOW RICE IS SERVED ON YOUR DINING-TABLE

            Do you have rice as your staple food? But have you ever thought how rice is served on your dining-table. Let’s see the process, shall we?

            First of all, grains are grown on rice fields. When the grains are ripe enough, they are harvested and stored in silos. Later, they are sent into the mills to remove their husks. When the husks have been removed from the grains, they are called rice.

            The rice is then kept in sacks. After that, the sacks are sent to the stores. The prices vary among the rice according to its quality. The rice is bought by the consumers and carried home.

            At home, the rice is washed and cooked in a rice cooker or a simmer. Finally, when it is done, the rice becomes resilient. Now the rice is ready to serve on our dining-table.

            Rice is the most important staple food in most parts of Asia. Asians grow and eat 95% of the world’s rice.

Pertanyaan2nya adalah:

1.   What does the text tell us about?

      a.   The process from grains to rice

      b.   How to cook rice properly

      c.   How to harvest ripe grains

      d.   Rice is the staple food of Asians

      e.   The process of harvesting rice

      Jawaban yg benar itu yg A / E ya, Pak/Bu?

2.   We call the grains rice ……… we have removed the husks.

      a.   when

      b.   before

      c.   after

      d.   although

      e.   because      Jawaban yg benar itu yg A / C ya, Pak/Bu? ABORTION: PRO AND CONTRA

            There has been a great deal of discussion on the problem of abortion in this country and abroad. The discussion includes: is abortion legal or illegal?, is abortion morally justified or not?

            On the one hand, abortion is one of the method of birth control. When a country faces the problems of population explosion, the government should find methods to solve it. But since no methods of contraception is one hundred percent effective and successful, abortion becomes the only way out when prevention fails.

            On the other hand, abortion may cause many negative effects for women’s health. Women risk their health and lives in bearing the weight of the operation and its consequences. The most common complications are inflammation, interruption of menstrual patterns, infertility, endometriosis, myoma of the uterus and many other kind of ovary illnesses. Besides, the humanists say that abortion is a crime and against the law.

            So far, Abortion becomes a dilemma for countries with a large number of citizens. On the one hand, it can control the birthrate but on the other hand, it brings terrible consequences, especially for the women’s health.

Pertanyaan2nya adalah:

3.   Why is abortion chosen as one of the birth control method?             Because ………                     

      a.   no contraception method is one hundred percent effective and               successful.

      b.   a country has to overcome the problems of population explosion.

      c.   women risk their health and lives in bearing the weight of the                  operation.

      d.   abortion becomes a dilemma for countries with a large number               of citizens.

      e.   the government should find methods to solve the overpopulation problem.

      Apakah jawaban yg benar itu yg A ya, Pak/Bu?

4.   Which of the following statement is not true?

      a.   Abortion may lead to many kinds of ovary illnesses.

      b.   The operation on abortion is very risky and suffering.

      c.   There are lots of people who disagree with the abortion.

      d.   The government has not found a successful method of birth                    control.

      e.   The government should find a successful method of abortion.

      Apakah jawaban yg benar itu yg E ya, Pak/Bu?

1 A

2 B

3 A

E

TOP URGENT

Bahasa Inggris Kelas 12

Since the olden days, people have always been changing information. Man is not determined to live solitary except certain people or those who do this for certain purposes. People live among others and they need to increase, too. Increasing in many ways, in the way to get their food more easily, to find new things important for them, or in short to make life easier, information is one way to reach it.

            When the world is not as developed as now, information was still very limited. People did change information, but in much simpler ways compared to those that are used nowadays in places where writing had not been used, they changed information by speaking directly or through codes. Then people used letters in the form of writings on pieces of paper or perhaps when paper had not been found yet, they wrote letters or messages on leaves or tree-barks. Very important things were carved on stones.

            What about today? Do people change information? Of course they do. Among those who met face to face they change information by asking and telling one another. Not only do they need information from around their homes or offices but also from farther places from outside their homes, even from outside their countries. It is said that nowadays we live in the globalization era, meaning that countries in the world will be able to increase themselves if they organize with other countries. They depend on one another.

            Among others, information is the one thing that everyone or every country needs. Since several years ago sophisticated instruments have been being used. People have been making use of electronics and other devices. They change information through extremely sophisticated tools. Printed materials come into and out of countries in the world. Telex and facsimile have been broadly applied. By installing a parabolic antenna on out TV set we can watch programs from abroad clearly. The use of internet computers is now developing everywhere.

            In conclusion, globalization information are essential to reach everything easier and faster.

Pertanyaan2nya adalah:

1.   What is the text about?

      a.   Spreading information

      b.   Globalization of information

      c.   Forms of information

      d.   Increasing information

      e.   Important information

      Jawaban yg benar itu yg A, B / E ya, Pak/Bu? Mohon penjelasannya.

2.   According to the last paragraph, the writer wants ………

      a.   to retell the story of information in global era

      b.   to describe the forms of information in globalization

      c.   to explain the process of sending information in global era

      d.   to inform the readers the history of information globally

      e.   to emphasize the importance of information in globalization

      Apakah jawaban yg benar itu yg E ya, Pak/Bu?

3.   According to paragraph one, information is not only to make life      easier, but also to help people to …………… 

      a.   study globalization

      b.   send information

      c.   change information

      d.   increase knowledge

      e.   reach life

      Jawaban yg benar itu yg D / E ya, Pak/Bu? Mohon      penjelasannya.

4.   Since several years ago sophisticated instruments have been being             used. The word ‘sophisticated’ has almost the same meaning          as ………

      a.   good

      b.   complex

      c.   complicated

      d.   difficult

      e.   modern

      Jawaban yg benar itu yg B, C / E ya, Pak/Bu? Mohon penjelasannya.

5.   By installing a parabolic antenna on our TV set we can watch          programs from abroad clearly. The use of internet computers is     now developing everywhere.

      These statements show that ………

      a.   The use of a parabolic antenna is developing now

      b.   Installing a parabolic is a must to access information

      c.   To watch programs on TV, use computer clearly

      d.   It is very easy to access information nowadays

      e.   Programs from abroad must be clearly installed

      Jawaban yg benar itu yg B / D ya, Pak/Bu?

1.B

2.E

3.D

4 E

5 D