• Daftar Pertanyaan yang telah dijawab

10505 Data founds

mohon dijawab pertanyaan saya :

1. sebuah roda melakukan gerak melingkar sebanyak 50 putaran terhadap porosnya dalam 1 sekon. tentukan kelajuan linear sebuah titik pada roda yg berjarak 2 cm dan 4 cm dari pusatnya

2. sepertiga keliling lingkaran ditempuh oleh badu dalam waktu 15 sekon dengan berlari. berapakah periode dan frekuensi lari badu ?

3. sebuah piringan hitam yg sedang memainkan lagu, berputar dab menempuh sudut pusat 13,2 rad dalam 6 sekon. hitung :

a. kecepatan sudut                                                                                                  b. periode dan frekuensi piringan hitam tersebut                                                         (ambil phi = 3,14 )

4. sebuah ban sepeda (garis tengah 80 cm) melaju dengan kelajuan 47,1 km/jam. jika phi = 3,14 tentukan :                                                                                     a. frekuensi putar ban (dalam hertz)                                                                      b. kecepatan sudut                                                                               

No. 1

v = ωR = 2πfR = 2x3,14x50x0,02 = ...

v = ωR = 2πfR = 2x3,14x50x0,04 = ... 


No. 2

sepertiga keliling lingkaran butuh waktu 15 sekon, berarti satu keliling lingkaran butuh waktu 3 x 15 sekon = 45 sekon.

Jadi T = 45 sekon, f = 1/45 Hz


No. 3

a. ω  = 13,2/6 rad/s

b. f =  ω/2π = ...           dan T = 1/f = .............


No. 4

Gunakan persamaan

v = ωR     dan ω = 2πf = 2π/T


Silahkan coba!

Pelajaran Fisika (SMA) Kelas 10
07-12-2010 ranti
25-02-2011 Winarso, S.Pd


Saya mau nanya cara mengerjakan soal ini bagaimana?

1. Jika f(x) dibagi dengan (x2-1) sisanya (2x+4). Tentukan sisanya jika f(x) dibagi dengan x+1

2. Sukubanyak f(x)= x4-ax2+bx-8 habis dibagi dengan x2-2x+1. Hitunglah nilai a dan b, serta hasil baginya.

Mohon bimbingannya...

1. kamu dapat gunakan sifat begini; suatu fungsi dibagi  (x2-1) ada hasil dan sisa yang dapat ditulis sebagai berikut

f(x) = H(x) (x2-1)  +  sisa

f(x) = H(x) (x - 1) ( x + 1 ) +( 2x+4) 

f(1) =   H(x)  0 ( x + 1 ) + ( 2. 1 + 4 )--> f(1) = 6

f(-1) =  H(x)  0 ( x - 1 ) + ( 2. (-1 )+ 4 )--> f(-1) =2

Jadi sisanya = 2, yang nomer 2 coba sendiri 

Pelajaran Matematika Kelas 11
23-02-2011 Yanti
24-02-2011 Drs. Jumadi

Tirta dapat memindahkan tumpukan pasir dalam waktu 3 jam, sedangkan Arman dapat memindahkan pasir yang sama dalam waktu 6 jam. jika Tirta dan Arman  bekerja bersama-sama memindahkan pasir tersebut berapa waktu yang diperlukan ?

Selamat jumpa...

Dalam 3 jam Tirta dapat menyelesaikan pekerjaannya, berarti dalam 1 jam Tirta dapat menyelesaikan = 1/3 bagian dari pekerjaannya.

Dalam 6 jam Arman dapat menyelesaikan pekerjaannya, berarti dalam 1 jam Arman dapat menyelesaikan = 1/6 bagian dari pekerjaannya.

Kalau Tirta dan Arman bekerja bersama dalam waktu 1 jam dapat menyelesaikan = (1/3 + 1/6 ) bagian = 3/6 bagian = 1/2 bagian.

Jadi pekerjaan tersebut bila dikerjakan bersama sama dapat selesai dalam waktu = 2/1 x 1 jam = 2 jam.

Selamat belajar.

Pelajaran Matematika Kelas 9
23-02-2011 Yuda
23-02-2011 B. Bremaniwati , S.Pd

Sebuah mobil baru harganya Rp100.000.000,00 setiap akhir tahun harga mobil tersebut turun 10%. Berapa harga mobil tersebut pada akhir tahun kelima ?

Selamat jumpa.

Soal anda dapat diselesaikan dengan rumus suku ke-n dari barisan geometri.

Diketahui Suku ke-1 = a = 100.000.000 

Sehingga barisannya menjadi : 100.000.000 , 90.000.000 , 81.000.000, ... 

Sehingga rasionya = r = U2 : U1 = 90.000.000 : 100.000.000 = 0,9

Suku yang di cari berarti suku ke 6 = U6 = a x rn-1 = 100.000.000 x (0,9)(6-1) = 59.049.000. 

Jadi harga mobil pada akhir tahun ke-5 adalah Rp 59.049.000,00 

Selamat belajar.

Pelajaran Matematika Kelas 9
23-02-2011 ARYA
23-02-2011 B. Bremaniwati , S.Pd

bapak/ibu guru saya minta contoh teks descriptive yang menggambarkan kota jogja dan yang menggambarkan binatang yaitu anjing. panjang teksnya 1 halaman kertas A4. masing-masing teks di beri 5 pertanyaan.balas secepatnya ya.. terima kasih..


Paris is the capital of a European nation, France. It is also on of the most beautiful and famous cities in the world.

         Paris is called the City of Light. It is also an international fashion center. What stylish women are wearing in Paris will be worn by women all over the world. Paris is also famous for its world center of education. For instance, it is the headquarters of UNESCO, the United Nations Educational, Scientific and Cultural Organization.

         The Seine River divides the city into two parts. Thirty-two bridges cross this scenic river. The oldest and perhaps the most well known in Pont Neuf was built in the sixteenth century. Sorbonne, a famous university, is located on the left bank (south side) of the river. The beautiful white church Sacre Coeur lies on the top of a hill called Montmartre on the right bank (north side) of the Seine.

         There are many other famous places in Paris, such as the famous museum the Louvre as well the cathedral of Notre Dame. However, the most famous landmark in this city must be the Eiffel Tower.

         Paris is named after a group of people called Parisii. They built a small village on an island in the middle of the Seine River about two thousand years ago. This island is called Ile de la Cite. It is where Notre Dame located. Today around eight million people live in the Paris area.


1. The fifth paragraph tells …….

  a.       about Paris

  b.       the origin of the word Paris

  c.       the location of Notre Dame

  d.       a village built thousand years ago

  e.       an island in the middle of the seine River


2.  What is the oldest and most well known part of the city?

  a.       The seine river

  b.       The Pont Neuf

  c.       The Sorbonne

  d.       The right bank

  e.       The left bank


3.  From the text, we know that Notre Dame is located …..

  a.       on the left bank

  b.       near the Louvre

  c.       on the right bank

  d.       outside the city of Paris

  e.       in the middle of the seine River

My Cat Gregory
Gregory is my beautiful gray Persian cat. He walks with pride and grace, performing a dance of disdain as he slowly lifts and lowers each paw with the delicacy of a ballet dancer. His pride, however, does not extend to his appearance, for he spends most of his time indoors watching television and growing fat.
He enjoys TV commercials, especially those for Meow Mix and 9 Lives. His familiarity with cat food commercials has led him to reject generic brands of cat food in favor of only the most expensive brands.
Gregory is as finicky about visitors as he is about what he eats, befriending some and repelling others. He may snuggle up against your ankle, begging to be petted, or he may imitate a skunk and stain your favorite trousers. Gregory does not do this to establish his territory, as many cat experts think, but to humiliate me because he is jealous of my friends.
After my guests have fled, I look at the old fleabag snoozing and smiling to himself in front of the television set, and I have to forgive him for his obnoxious, but endearing, habits.

Pelajaran Bahasa Inggris Kelas 12
20-02-2011 christina
22-02-2011 Tri Raharjo, S.Pd

saya mau minta contoh text description bahasa inggris donk yang menggambarkan suatu tempat seperti jogja dan menggambarkan binatang seperti anjing,isinya 1 hlaman kertas A4 saja. bisa kan di krim secepatnya, tolong dikirim ke email saya saja.saya benar2 membtuhkanya. terima kasih,,..



Is there any city in Europe, or else, like Prague? There has been a city here for over a thousand years, and now 2.250.000 people live here. It is most famous for its Gothic and Baroque building styles. Old Town Square, with its wonderful clock, the Charles Bridge, and Prague Castle on the hill above the river are just a few of Prague’s famous attractions.

       Getting around Prague is easy by tram or underground train but it’s also a pedestrian’s dream because much of the old quarter and many of the streets and lanes have little or no traffic. The medieval center is Prague castle and St Vitus Cathedral. An evening view of these illuminated landmarks is one of the most memorable sights in Europe. Wenceslas Square is in the heart of modern Prague.

       Visiting Prague today, you immediately notice the lively atmosphere. The city can be crowded during the hot summer months, but it is delight to visit any time of the year, even in the snowy cold of winter. In fact, tourism makes the largest contribution to Prague’s economy. Classical concerts take place all through the year, though the biggest event is the Prague Spring International Music Festival in May and early June. Theatre also has a special place in the life of the city.

         The suburbs are like many in Eastern Europe with tall sky crappers and some light industry, but you are very quickly in the sleepy villages and gentle hills of Bohemia. Many people say Prague reminds them of Vienna or Budapest. But in fact, Prague is unique. There’s nowhere quite like it.


1.      The purpose of the text is …….

a.       to inform people about Prague’s beauty

b.       to tell people about the history of Prague

c.       to present people about the events in Prague

d.       to describe the city of Prague and its uniqueness

e.       to persuade


2.      An evening view of these illuminated landmarks ………..

The underlined word means ……..

a.       full of colors

b.       full of buildings

c.       full of memories

d.       full of illusion

e.       full of lights


3.      The text organization/generic structure for this text consists of ……..

a.       general classification – description

b.       identification – explanation

c.       orientation – events – reorientation

d.       identification – description

e.       general classification – events


4.      The text above belongs to ……..

a.       Recount

b.       Narrative

c.       Explanation

d.       Discussion

e.       Description


5.      The text tells us about ………

a.       Europe

b.       Gothic building

c.       Charles Bridge

d.       Prague Castle

e.       Prague


Pelajaran Bahasa Inggris Kelas 12
20-02-2011 christina
22-02-2011 Tri Raharjo, S.Pd

Pak/Ibu, tolong beri saya contoh surat niaga tentang penawaran barang


Pelajaran Bahasa Indonesia Kelas 11
22-02-2011 Operator TIT

maz, tolongin bwatin teks mc dunk!! tolong cptan ya, be2rpa hri lge mau ku bwad prktek.... thax


Pelajaran Bahasa Indonesia Kelas 9
22-02-2011 Operator TIT