CBSE > Class 09 > Science | CBSE Board | Homework Help

(GIVEN) Distance = 100 km Speed while traveling= 60km /h (1) Speed while returning= 40km/h(2) To find time T= D/S Case 1 : 100/60 5/3 hrs Case 2:100/40 5/2hrz *Average speed* = total distance / total time = 100+100/5/3+5/2 200/(l.c.m) 10/6+15/6 200/25/6 200×6/25 8×6 ===✓48 km/h is your answer

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A car travels 100km at a speed of 60km/h and returns with a speed of 40 km/h.Calculate the average speed for the whole journey

Posted by Sanvitti Kalkonde 11 months, 4 weeks ago

CBSE > Class 09 > Science

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Put an unlit incense stick in a corner of your class. How close do you have to go near it so as to get its smell? • Now light the incense stick. What happens? Do you get the smell sitting at a distance? • Record your observations (Diagram)

Posted by Minhazul Alom 11 months, 4 weeks ago

CBSE > Class 09 > Science

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Posted by Minhazul Alom 11 months, 4 weeks ago

CBSE > Class 09 > Science

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Plan go to a place by vehicle. Take reading of odometer and speedometer after everyfive minutes till you reach your destination. Record these observations in tabular form then plot graph between distance- time. State whether this motion is uniform or non uniform2. Make a data of any five trains starting from Delhi and going to different states ( any five) inIndia

Posted by Yashi Bhati 11 months, 4 weeks ago

CBSE > Class 09 > Science

2 answers

Jashwin Mn 11 months, 3 weeks ago

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Yashi Bhati 11 months, 4 weeks ago

Give me the answer

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In science first lesson which of the following are matter

Posted by Dhanvanth Dhanvanth 11 months, 4 weeks ago

CBSE > Class 09 > Science

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A body is moving with a velocity of 12 m second and it comes address in 18 m what was the acceleration

Posted by Ishika Malik 11 months, 4 weeks ago

CBSE > Class 09 > Science

1 answers

Vinay Wagh 11 months, 1 week ago

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Define average speed.

Posted by Aman Kumar 11 months, 4 weeks ago

CBSE > Class 09 > Science

1 answers

Manish Patel 11 months, 4 weeks ago

A body cover total distance divided by total time taken

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100 neno miter

Posted by Shivam Yadav 11 months, 4 weeks ago

CBSE > Class 09 > Science

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Write the role of diffusion in living organism

Posted by 21 M.Naveen Reddy 11 months, 4 weeks ago

CBSE > Class 09 > Science

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Activity 1.5

Posted by Kirti Pandey 1 year ago

CBSE > Class 09 > Science

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Define membrane biogenesis.

Posted by Ishaan Parihar 1 year ago

CBSE > Class 09 > Science

4 answers

Mann Zunjarrao 11 months, 3 weeks ago

1)SER helps in the manufacturing of fat molecules or lipids. 2)RER helps in the manufacturing of proteins. 3)Some of this proteins and lipids help in building the cell membrane. 4)This process is known as membrane biogenesis.

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Gopal Paul 11 months, 4 weeks ago

Membrane biogenesis means the formation of plasma membrane.

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Shlok Ghule 1 year ago

What is velocity in marathi

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Shlok Ghule 1 year ago

What is velocity

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What is the work to be done to increase the velocity of a car from 30 km h-1 to 60km h-1 if the mass of the car is 1500kg

Posted by Jyoti Singh 1 year ago

CBSE > Class 09 > Science

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'Osmosis is a special kind of diffusion'.Comment

Posted by Sanaj Dahiya 11 months, 4 weeks ago

CBSE > Class 09 > Science

2 answers

Tanvi Arora 11 months, 3 weeks ago

“Osmosis is the term used to refer specifically the diffusion of water across a differentially or selectively permeable membrane.” Yes, osmosis is a special type of diffusion because in both cases there is a movement of particles from a higher concentration region to a lower concentration region.

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Sanaj Dahiya 11 months, 4 weeks ago

Osmosis is diffusion through semipermeable membrane. Diffusion can take place in all 3 states (solid, liquid, gas) but osmosis take place only in liquid. And in diffusion, the movement of either solute or solvent occurs in both directions whereas in osmosis there is only undirectional flow of solvent. Hence, osmosis is a special kind of diffusion.

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difference between chromaplast and leucoplast

Posted by Ishaan Parihar 1 year ago

CBSE > Class 09 > Science

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List the constituents of plasma membrane.

Posted by Ishaan Parihar 1 year ago

CBSE > Class 09 > Science

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Gopal Paul 11 months, 4 weeks ago

It is made up of 75 percent phospholipids. There r many ither constituents like cholestrol, proteins abd polysaccharides.

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Vijay Chavan 1 year ago

Bczbhj

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Give two reasons to justify that- Water is liquid at room temperature

Posted by Shaurya Gupta 1 year ago

CBSE > Class 09 > Science

2 answers

Vaibhav Gupta 1 year ago

Hope relateable

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Vaibhav Gupta 1 year ago

Reason 1:- the room temperature is not enough that it boil water and convert it into (gas) Reason 2:- the room temperature is not enough that it freezes (solid) water

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Oh chp 1

Posted by Devyani Karpe 1 year ago

CBSE > Class 09 > Science