Fariha Hasanah

 Berikut disajikan soal cerita yang merupakan penerapan materi persamaan garis singgung lingkaran. Soal cerita: Penerapan materi persamaan garis singgung yang melalui suatu titik di luar lingkaran Soal cerita: Penerapan kedudukan titik pada lingkaran

Penerapan Persamaan Garis Singgung Lingkaran yang Melewati Satu Titik di Luar Lingkaran dalam Kehidupan Sehari-hari Pak Rudi, pemilik taman bermain “Dolano” Surabaya, berencana mengembangkan “Dolano” dengan menambahkan wahana baru, yaitu komedi putar. Sebagai pemilik taman bermain yang bertanggung jawab, Pak Rudi telah membuat rencana dengan perhitungan yang matang. Pak Rudi menyiapkan lahan seluas 7x7  meter dan akan meletakkan komedi putar dengan titik porosnya berada tepat di tengah-tengah lahan yang telah disediakan. Sebagai hiasan, Pak Rudi menyiapkan lampu led warna-warni sepanjang 10 π   meter yang akan dipasang pada sekeliling komedi putar. Sebagai pengaman agar tidak ada pengunjung yang terjatuh, panitia akan memasang dua buah lampu sensor berupa infrared. Setiap sensor akan menyorot dan menyinggung salah satu titik tepi komedi putar. Ketika ada kerusakan yang terdeteksi sensor, komedi putar akan otomatis berhenti berputar sehingga diharapkan tidak ada kejadian yang...

The problem of garbage in the sea from day to day is increasingly unstoppable. This has a tremendous impact on marine life. In addition to polluting the oceans, rubbish is also consumed and poisoned by marine animals. For example, plastic waste. Plastics are synthetic organic polymers. The lightweight, strong and durable plastic character makes plastic widely used for manufacturing various kinds of products, especially packaging products. The University of Georgia study released in 2016 found that the oceans in Indonesia are the second in the world to store the most plastic waste. At the "One Day Seminar on Marine Tropical Diversity and Sustainability" seminar at the Winter School Program 2018, Thursday (1/25) at Ged B 101 FMIPA UI, Dr. rer. nat. Mufti Petala Patria, M.Sc., Department of Biology marine expert FMIPA UI in her presentation explained that more than 8 million tons of plastic waste is discharged into the sea each year, around 80% of which comes from acti...

In this era, humans cannot be separated from the name plastic. Plastics are always used in a variety of daily needs, for example for drinks and food, shopping and much more. Plastic is used because it is lightweight, not easily broken, cheap, and easy to get. But many people are not aware of the dangers caused by the use of plastic on the environment, because a lot of the recommended plastic is only for single use. This has a negative impact on the environment. Overuse of plastic will result in pollution of plastic waste. One factor that causes damage to the environment which until now is a factor in the disposal of plastic waste. Plastic bags have become dangerous and difficult to manage waste. It takes decades or even hundreds of years to make the plastic waste completely biodegradable. But the problem is the negative impact caused by plastic waste which has a huge impact on the environment. Disposal of careless plastic waste will cause siltation of the river and clogged river fl...

Plastic is abundant in business and everyday life. We can find it as product components, containers of products, and furniture. Plastic have many uses in the medical field as well, with the introduction of polymer implants and other medical decives derived at least partially from plastic. Almost everyone knows plastic and using it, but most of them don’t know how to manufacture it. Early plastics were bio-derived materials such as egg and blood proteins, which are organic polymers. The development of plastics has envolved from the use of natural plastic materials (e.g., shellac) to the of chemically modified, natural materials (e.g., natural rubber, nitrocellulose, collagen) and finally to completely synthetic molecules (e.g., bakelite, expoy, polivynil chloride). Parkesine (nitrocellulose) is considered the first man-made plastic. The plastic material was patented by Alexander Parkes, in Birmingham, England in1856. Parkesine was made from cellulose, the major component of...

In the modern era, mostly equipment is produced with plastic based, such as  table, chair, door, shower products, and dinnerware. But, not all of plastic products safe for the body. A lot of types of plastic that we’ve produced today and used. There are around 30 different types of plastic in regular use. Basically there are two types, that is good plastic and bad plastic. Here, the types plastics we’re discussing is good plastic or bad plastics for human use. In this essay, I would like to explain about three types of good plastic and three of bad plastic. For good plastic, probably the easiest to identify is Polyethylene Terephthalate (PET). It is used for the clear plastic bottles which we find in supermarkets, containing fizzy drinks such as lemonade and cola. PET soft drink bottles make up about 20 per cent of all moulded plastic containers. It was known as the safest and as a well known plastic and easy to be recycled. However, recently they found that traces of DEHP in...