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 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 09 > Science

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Posted by Minhazul Alom 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 09 > Science

2 answers

Jashwin Mn 1 year, 3 months ago

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Yashi Bhati 1 year, 3 months ago

Give me the answer

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In science first lesson which of the following are matter

Posted by Dhanvanth Dhanvanth 1 year, 3 months 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 1 year, 3 months ago

CBSE > Class 09 > Science

1 answers

Vinay Wagh 1 year, 2 months ago

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Define average speed.

Posted by Aman Kumar 1 year, 3 months ago

CBSE > Class 09 > Science

1 answers

Manish Patel 1 year, 3 months ago

A body cover total distance divided by total time taken

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100 neno miter

Posted by Shivam Yadav 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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Write the role of diffusion in living organism

Posted by 21 M.Naveen Reddy 1 year, 3 months ago

CBSE > Class 09 > Science

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Activity 1.5

Posted by Kirti Pandey 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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Define membrane biogenesis.

Posted by Ishaan Parihar 1 year, 3 months ago

CBSE > Class 09 > Science

4 answers

Mann Zunjarrao 1 year, 3 months 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 1 year, 3 months ago

Membrane biogenesis means the formation of plasma membrane.

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Shlok Ghule 1 year, 3 months ago

What is velocity in marathi

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Shlok Ghule 1 year, 3 months 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, 3 months ago

CBSE > Class 09 > Science

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'Osmosis is a special kind of diffusion'.Comment

Posted by Sanaj Dahiya 1 year, 3 months ago

CBSE > Class 09 > Science

2 answers

Tanvi Arora 1 year, 3 months 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 1 year, 3 months 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, 3 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

List the constituents of plasma membrane.

Posted by Ishaan Parihar 1 year, 3 months ago

CBSE > Class 09 > Science

2 answers

Gopal Paul 1 year, 3 months 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, 3 months ago

Bczbhj

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

Posted by Shaurya Gupta 1 year, 3 months ago

CBSE > Class 09 > Science

2 answers

Vaibhav Gupta 1 year, 3 months ago

Hope relateable

1Thank You

Vaibhav Gupta 1 year, 3 months 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, 3 months ago

CBSE > Class 09 > Science

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Blue question from text book

Posted by Devyani Karpe 1 year, 3 months ago

CBSE > Class 09 > Science

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24. Study the speed-time graph of a body shown in below figure and answer the following questions: (a) What type of motion is represented by OA? (b) What type of motion is represented by AB? (c) What type of motion is represented by BC? (d) Calculate the acceleration of the body. (e) Calculate the retardation of the body. (f) Calculate the distance travelled by the body from A to B.

Posted by Khushi Bondre 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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Sir isaac newton theories

Posted by Yogita Singh 1 year, 3 months ago

CBSE > Class 09 > Science

1 answers

Yogita Singh 1 year, 3 months ago

Give answer

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What are 🧬 genes ?

Posted by Anjali Verma 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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Write it in celcius scale :580k

Posted by Manish Patel 1 year, 3 months ago

CBSE > Class 09 > Science

2 answers

Sap An 1 year, 3 months ago

Temperature in celcius scale= Temperature in kelvin - 273 To convert 580k in °C, 580k-273= 307°C

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Manish Patel 1 year, 3 months ago

580- 273=307

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Why matter sorrounding

Posted by Ritushree Roy 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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Why Bacteria and Fungi Can survive in extreme condition?

Posted by Ashish Raj 1 year, 3 months ago

CBSE > Class 09 > Science

1 answers

Aradhya Sinha 1 year, 3 months ago

Archaea

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Name the phenomenon which causes one crystal of pottasium

Posted by Shalu Gupta 1 year, 3 months ago

CBSE > Class 09 > Science

1 answers

Yash Yash 1 year, 3 months ago

Diffusion

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Distance travelled by car and at regular time intervals graph

Posted by Dhruvi Palan 1 year, 3 months ago

CBSE > Class 09 > Science

0 answers

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