Tiwari Academy Discussion

Asked: October 27, 2020In: Class 9

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s–1 to 8 m s–1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-129 Questions No-16

Krisha Prasad

Asked: October 27, 2020In: Class 9

How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 m s–2.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-129 Questions No-18

pooja banerjee

Asked: October 21, 2020In: Class 10

Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-156 Questions No-2

Poll

pooja banerjee

Asked: October 21, 2020In: Class 10

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-159 Questions No-1

Arjun Nagpal

Asked: October 20, 2020In: Class 10

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-143 Questions No-1

Arjun Nagpal

Asked: October 20, 2020In: Class 10

How does the creation of variations in a species promote survival?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-143 Questions No-2

Arjun Nagpal

Asked: October 20, 2020In: Class 10

How do Mendel’s experiments show that traits may be dominant or recessive?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-147 Questions No-1

Arjun Nagpal

Asked: October 20, 2020In: Class 10

How do Mendel’s experiments show that traits are inherited independently?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-147 Questions No-2

Arjun Nagpal

Asked: October 20, 2020In: Class 10

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-147 Questions No-3

Arjun Nagpal

Asked: October 20, 2020In: Class 10

How is the sex of the child determined in human beings?

NCERT Solution for Class 10 Science Chapter 9 Heredity and Evolution NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-147 Questions No-4

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s–1 to 8 m s–1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm? Take its downward acceleration to be 10 m s–2.

Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?

A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as

If a trait A exists in 10% of a population of an asexually reproducing species and a trait B exists in 60% of the same population, which trait is likely to have arisen earlier?

How does the creation of variations in a species promote survival?

How do Mendel’s experiments show that traits may be dominant or recessive?

How do Mendel’s experiments show that traits are inherited independently?

A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?

How is the sex of the child determined in human beings?

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