Rachna

Tajender

Asked: January 3, 2021In: Class 10 Science

Why some materials are not decomposed by the action of micro-organisms?

NCERT Solutions for Class 10 Science Chapter 15 Important Board Questions Our Environment NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Questions Questions No: 13

Tajender

Asked: January 3, 2021In: Class 10 Science

What is a food web? Explain with example.

NCERT Solutions for Class 10 Science Chapter 15 Important Board Questions Our Environment NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Questions Questions No: 14

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity.

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-144 Questions No-14

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-144 Questions No-17

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

In what direction does the buoyant force on an object immersed in a liquid act?

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-144 Questions No-19

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

Why does a block of plastic released under water come up to the surface of water?

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-144 Questions No-20

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

The volume of 50 g of a substance is 20 cm^3. If the density of water is 1 g cm^–3, will the substance float or sink?

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-145 Questions No-21

Nirav Jaiswal

Asked: October 28, 2020In: Class 9

The volume of a 500 g sealed packet is 350 cm^3. Will the packet float or sink in water if the density of water is 1 g cm^–3? What will be the mass of the water displaced by this packet?

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-145 Questions No-22

Taara Sharma

Asked: October 28, 2020In: Class 9

When do we say that work is done?

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-149 Questions No-1

Taara Sharma

Asked: October 28, 2020In: Class 9

Write an expression for the work done when a force is acting on an object in the direction of its displacement.

NCERT Solutions for Class 9 Science Chapter 11 Important NCERT Questions Work and Energy NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-149 Questions No-2

Rachna

Why some materials are not decomposed by the action of micro-organisms?

What is a food web? Explain with example.

A stone is released from the top of a tower of height 19.6 m. Calculate its final velocity.

A stone is allowed to fall from the top of a tower 100 m high and at the same time another stone is projected vertically upwards from the ground with a velocity of 25 m/s. Calculate when and where the two stones will meet.

In what direction does the buoyant force on an object immersed in a liquid act?

Why does a block of plastic released under water come up to the surface of water?

The volume of 50 g of a substance is 20 cm^3. If the density of water is 1 g cm^–3, will the substance float or sink?

The volume of a 500 g sealed packet is 350 cm^3. Will the packet float or sink in water if the density of water is 1 g cm^–3? What will be the mass of the water displaced by this packet?

When do we say that work is done?

Write an expression for the work done when a force is acting on an object in the direction of its displacement.

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