Ulangan Fisika X DHSC

1. Dari hasil pengukuran di dapatkan angka 0,0009 (gram). Banyaknya angka penting adalah ….

Satu

Lima

Dua

Enam

Tiga

The given measurement result is 0.0009 grams. The number of significant figures in this measurement is one. This is because leading zeros before a decimal point are not significant. Therefore, the only significant digit in the measurement is 9.

Explanation

The given measurement result is 0.0009 grams. The number of significant figures in this measurement is one. This is because leading zeros before a decimal point are not significant. Therefore, the only significant digit in the measurement is 9.

2. Hasil pengukuran panjang di bawah ini yang mempunyai 3 angka penting yaitu ….

0,0231

2,7001

2,900

12,50

2500,0

The measurement 0.0231 has three significant figures because all non-zero digits are considered significant. The zeros at the beginning and end of the number are not significant as they only serve as placeholders.

Explanation

The measurement 0.0231 has three significant figures because all non-zero digits are considered significant. The zeros at the beginning and end of the number are not significant as they only serve as placeholders.

3. Hasil pengukuran suatu benda 0,020 (m), maka jumlah angka pentingnya adalah ….

Satu

Dua

Tiga

Empat

Lima

The measurement of the object is given as 0.020 (m), which has two significant figures. The zeros before the 2 are not significant because they are leading zeros. The significant figures in a measurement include all the digits that are known with certainty plus one estimated digit. Therefore, the correct answer is "Dua" which means "Two" in English.

Explanation

The measurement of the object is given as 0.020 (m), which has two significant figures. The zeros before the 2 are not significant because they are leading zeros. The significant figures in a measurement include all the digits that are known with certainty plus one estimated digit. Therefore, the correct answer is "Dua" which means "Two" in English.

4. 0,000000105 juka ditulis dalam notasi ilmiah adalah ….

1,05 x 10 pangkat -10

1,05 x 10 pangkat -9

1,05 x 10 pangkat -8

1,05 x 10 pangkat -7

1,05 x 10 pangkat -6

The given number, 0,000000105, can be written in scientific notation as 1,05 x 10^-7. This is because in scientific notation, we write a number between 1 and 10 (in this case 1,05) multiplied by a power of 10 (in this case -7). This represents the value of the number in a more compact and standardized form.

Explanation

The given number, 0,000000105, can be written in scientific notation as 1,05 x 10^-7. This is because in scientific notation, we write a number between 1 and 10 (in this case 1,05) multiplied by a power of 10 (in this case -7). This represents the value of the number in a more compact and standardized form.

5. Dari hasil suatau pengukuran didapatkan angka 25,0960 (gram) banyaknya angka penting adalah ….

Dua

Tiga

Empat

Lima

Enam

The given measurement result is 25,0960 grams. To determine the number of significant figures, we count all the digits from the leftmost non-zero digit to the rightmost non-zero digit. In this case, there are six digits, which are all non-zero. Therefore, the correct answer is "Enam" (Six).

Explanation

The given measurement result is 25,0960 grams. To determine the number of significant figures, we count all the digits from the leftmost non-zero digit to the rightmost non-zero digit. In this case, there are six digits, which are all non-zero. Therefore, the correct answer is "Enam" (Six).

6. Notasi ilmiah dari 357 adalah ….

35,7 x 10 pangkat -3

3,57 x 10 pangkat -3

3,57 x 10 pangkat -4

3,57 x 10 pangkat -2

3,57 x 10 pangkat 2

The scientific notation of 357 is 3.57 x 10^2.

Explanation

The scientific notation of 357 is 3.57 x 10^2.

7. Tanah Pak Yudi bebrbentuk persegi panjang, setelah diukur ternyata panjangnya 11,62 (m) dan lebarnya 8,1 (m). Maka luas tanah Pak Yudi menurut aturan penulisan angka penting dan sudah dibulatkan adalah ….

94,1 (m2)

94 (m2)

94,12 (m2)

94,122 (m2)

9,4122 (m2)

The length and width of the land are given as 11.62 m and 8.1 m respectively. To find the area, we multiply the length and width. However, according to the rule of significant figures, we should round the final answer to the least number of decimal places given in the measurements, which is 1 decimal place. Therefore, the area of Pak Yudi's land, rounded to 1 decimal place, is 94.0 m². Since the trailing zero after the decimal point is not significant, it can be dropped, resulting in 94 m².

Explanation

The length and width of the land are given as 11.62 m and 8.1 m respectively. To find the area, we multiply the length and width. However, according to the rule of significant figures, we should round the final answer to the least number of decimal places given in the measurements, which is 1 decimal place. Therefore, the area of Pak Yudi's land, rounded to 1 decimal place, is 94.0 m². Since the trailing zero after the decimal point is not significant, it can be dropped, resulting in 94 m².

8. Suatu persegi diukur ternyata, panjangnya 12,56 (m) dan lebar 12,2 (m). Maka luas pita menurut aturan angka penting, mempunyai angka penting sebanyak ….

2 angka penting

3 angka penting

4 angka penting

5 angka penting

6 angka penting

The length of the square is given as 12,56 (m) and the width is given as 12,2 (m). According to the rules of significant figures, the number of significant figures in the area of the square can be determined by the measurement with the fewest significant figures. In this case, the width measurement has only 3 significant figures. Therefore, the area of the square will also have 3 significant figures.

Explanation

The length of the square is given as 12,56 (m) and the width is given as 12,2 (m). According to the rules of significant figures, the number of significant figures in the area of the square can be determined by the measurement with the fewest significant figures. In this case, the width measurement has only 3 significant figures. Therefore, the area of the square will also have 3 significant figures.

9. Pada bilangan 3,2145 yang merupakan angka taksiran adalah ….

3

2

1

4

5

The given numbers represent the digits of the number 3,2145. Among these digits, the last digit is 5. Therefore, the correct answer is 5.

Explanation

The given numbers represent the digits of the number 3,2145. Among these digits, the last digit is 5. Therefore, the correct answer is 5.

10. Nenden memiliki pita dengan panjang 12,64 (m). Kemudian dia membeli pita dengan panjang 8,1 (m). Maka total panjang pita yang dimiliki Nenden sekarang dengan aturan angka penting dan sudah dibulatkan adalah ….

20, 74 (m)

21 (m)

20,7 (m)

20,8 (m)

22 (m)

Nenden initially had a ribbon with a length of 12.64 m. She then bought another ribbon with a length of 8.1 m. To find the total length of the ribbons, we add the two lengths together. When we add 12.64 m and 8.1 m, we get 20.74 m. Since the question asks for the answer with significant figures and rounded, the correct answer is 20.7 m.

Explanation

Nenden initially had a ribbon with a length of 12.64 m. She then bought another ribbon with a length of 8.1 m. To find the total length of the ribbons, we add the two lengths together. When we add 12.64 m and 8.1 m, we get 20.74 m. Since the question asks for the answer with significant figures and rounded, the correct answer is 20.7 m.

Ulangan Fisika X Dhsc