Tiwari Academy Discussion

Netra

Asked: November 22, 2020In: Class 8 Science

Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

NCERT Solutions for Class 8 Science Chapter 15 Important NCERT Questions 8th Chapter 15 Some Natural Phenomena NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 6

Netra

Asked: November 22, 2020In: Class 8 Science

Explain why a charged body loses its charge if we touch it with our hand.

NCERT Solutions for Class 8 Science Chapter 15 Important NCERT Questions 8th Chapter 15 Some Natural Phenomena NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 5

Netra

Asked: November 22, 2020In: Class 8 Science

Sometime, a crackling sound is heard while taking off sweater during winters. Explain.

NCERT Solutions for Class 8 Science Chapter 15 Important NCERT Questions 8th Chapter 15 Some Natural Phenomena NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 4

Poll

Netra

Asked: November 22, 2020In: Class 8 Science

When a glass rod is rubbed with a piece of silk cloth the rod

NCERT Solutions for Class 8 Science Chapter 15 Important NCERT Questions 8th Chapter 15 Some Natural Phenomena NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 2

Poll

Netra

Asked: November 22, 2020In: Class 8 Science

Which of the following cannot be charged easily by friction?

NCERT Solutions for Class 8 Science Chapter 15 Important NCERT Questions 8th Chapter 15 Some Natural Phenomena NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 1

Geeta Kapoor

Asked: November 4, 2020In: Class 9

Refer to Example 5, Section 14.4, Chapter 14. Find the probability that a student of the class was born in August.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:283 Questions No:3

Geeta Kapoor

Asked: November 4, 2020In: Class 9

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:283 Questions No:1

Geeta Kapoor

Asked: November 4, 2020In: Class 9

Activity : Note the frequency of two-wheelers, three-wheelers and four-wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:285 Questions No:9

Geeta Kapoor

Asked: November 4, 2020In: Class 9

Activity : Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:285 Questions No:10

Geeta Kapoor

Asked: November 4, 2020In: Class 9

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg): 4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00 Find the probability that any of these bags chosen at random contains more than 5 kg of flour.

NCERT Solutions for Class 9 Maths Chapter 15 Important NCERT Questions Probability NCERT Books for Session 2022-2023 CBSE Board, UP Board and Other state Boards EXERCISE 15.1 Page No:285 Questions No:11

Name the scale on which the destructive energy of an earthquake is measured. An earthquake measures 3 on this scale. Would it be recorded by a seismograph? Is it likely to cause much damage?

Explain why a charged body loses its charge if we touch it with our hand.

Sometime, a crackling sound is heard while taking off sweater during winters. Explain.

When a glass rod is rubbed with a piece of silk cloth the rod

Which of the following cannot be charged easily by friction?

Refer to Example 5, Section 14.4, Chapter 14. Find the probability that a student of the class was born in August.

In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.

Activity : Note the frequency of two-wheelers, three-wheelers and four-wheelers going past during a time interval, in front of your school gate. Find the probability that any one vehicle out of the total vehicles you have observed is a two-wheeler.

Activity : Ask all the students in your class to write a 3-digit number. Choose any student from the room at random. What is the probability that the number written by her/him is divisible by 3? Remember that a number is divisible by 3, if the sum of its digits is divisible by 3.

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg): 4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00 Find the probability that any of these bags chosen at random contains more than 5 kg of flour.

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