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A motorcycle drives from A to B with a uniform speed of 30km/hr and returns back with a speed of 20km/hr. Find the average speed. (Use two methods to solve)

Posted by Meena Tk 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Pt Arnav Sharma 2 years, 5 months ago

For this type of ques there are two formulas one is for same distance and another is for same time i ur ques distance is same and displacement is zero so formula for same distance is 2v1×2v2/v1+v2 here v means speed 2×20×30/20+30 1200/50 24 km/hr this is a trick formula dont use in exam use long method

Apeksha Sharma 2 years, 5 months ago

24km/h

ANSWER

Plan to go to a place by vehicle. Take readings of odometer and speedometer after every 5minutes till you reach your destination. Record these observations in tabular form; plot graphs between distance-time and speed time. State whether this motion is a uniform or non-uniform motion

Posted by Naitik Sharma 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Pt Arnav Sharma 6 months ago

This is activity based ques u need to perform by urself

Hasan Africawala 6 months ago

?

ANSWER

What is meant by the term chemical formula ?

Posted by Miss Mansi 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Saurabh Yadav 2 years, 5 months ago

The formula which is chemically obtained. Is called chemical formula

ANSWER

make a data of five train starting from delhi going to different states any five in india and find its distance cover and average speed of each train and average time take to reach the destinetoin full answer explanation

Posted by Saif Khan Ali 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Distance and displacement by figure all functions

Posted by Rajan Maurya Maurya 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

A man goes 5km North,turn left for 3km,again turn left for 9km find displacement

Posted by Riddhi Sharma 2 years, 5 months ago

CBSE > Class 09 > Science

4 answers

Pawan Yadav 2 years, 4 months ago

7km

Avanish A 2 years, 5 months ago

7 km

Apeksha Sharma 2 years, 5 months ago

Displacement is 5km

Prashant Namdev 2 years, 5 months ago

7km

ANSWER

If a body travels 3km towards east 4km towards south 5km towards west and finally 9km towards south-east

Posted by Prakhar Pandey 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

6. A train starting from a railway station and moving with uniform acceleration attains a speed of 20 m/s in 10 seconds. Find its acceleration.

Posted by Raushan Kumar 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Pt Arnav Sharma 2 years, 5 months ago

acceleration=final velocity-initial velocity/time given initial=0m/s final=20m/s time=10s a=v-u/t a=20-0/10 a=20/10 a=2m/s^2(2 metre per second square)

ANSWER

We see water droplets on the grass in winter because

Posted by Shambhavi Sukhadare 2 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Ishita Sharma 2 years, 5 months ago

Due to evaporation

Prakhar Pandey 2 years, 5 months ago

Fog

Swapnil Sahu 2 years, 5 months ago

Evaporation

ANSWER

What is the ( a) common unit of temperature and (b) si unit of temperature ?

Posted by Kasish Dubey 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Ishita Sharma 2 years, 5 months ago

Common unit-celcius SI unit - Kelvin

Prakhar Pandey 2 years, 5 months ago

( a) celcius

ANSWER

How is motion different from rest? Explain all the different types of motion ( uniform motion,non- uniform motion, accelerated and non- accelerated ).

Posted by Sakshi Sharma 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Pt Arnav Sharma 2 years, 5 months ago

Motion is the phenomenon is which the position of object changes with respect to fixed point taken as referrence point , time,observer rest means object position not changing uniform motion when object covers equal distance in equal time interval non uniform opposite accelerated motion the motion which is caused by acceleration non accelarated motion opposite of accelerated

ANSWER

Give one solution in which solid acts as a solvent and liquid act as a solute

Posted by Saksham Dhakad 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which of the following quantic is not an example for a focus

Posted by Gøpâl Kölãgäñï 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

How can we say that air is a matter?

Posted by Sakshi Sharma 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Ishita Sharma 2 years, 5 months ago

One more ex can be when we fill air in a balloons it occupies space and fills in the shape of the balloon so by this we can also say that air is a matter

Srishti Gupta 2 years, 5 months ago

we can say this because air is a mixture of many gases and all gases have different mass such as oxygen , nitrogen etc.

ANSWER

Explain multiple fission in plasmodium with well labelled diagram

Posted by Mehak Sukhman 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Sonu Thakur 2 years, 5 months ago

Pls tell me answer

Sonu Thakur 2 years, 5 months ago

3x^+19x+30

ANSWER

at a time when it is cloudy, there may be frequent thunder and lightning. the sound of thunder takes some time to reach you after you see the lightning. measure the time interval using a digital wrist watch or a stop watch

Posted by Shayaan Khan 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 2 years, 5 months ago

Both thunder and lightning takes place at the same time . When two clouds collide with each other lightning and Thunder occurs simultaneously. The speed of light is more than the speed of sound. The speed of sound in air is 346 metre per second whereas the speed of light in air is 299 792 kilometre per second. Hence, the speed of light is more then the speed of sound in air. And so for that in a cloudy day we can hear the sound of thunder after we see the crack of the lightening.

Sonu Thakur 2 years, 5 months ago

3x^+19x+30

ANSWER

Make a plan to go to a place by a vehicle .Take reading of odometer and speedometer after every 5 minutes till you reach your destination record this observation in tabular form .plot graph s between distance and time .state whether this motion is uniform of non uniform.please give ans with explanation according to class 9

Posted by Saif Khan Ali 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Please can you tell me this according to class 9 fully .I have to do complete ans with explanation

Posted by Saif Khan Ali 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Saif Khan Ali 2 years, 5 months ago

Please give me ans

Aditya Raj 2 years, 5 months ago

Yes Saif Khan Ali

ANSWER

Difference between homogeneous mixture and heterogeneous mixture(4 points)

Posted by Pratha Patel 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Every living organism performs three main life process what are the three

Posted by Teju Reddy 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

The scootenist covers a distance of 3 km in 5 minute calculate its speed in first metre per second and second km/h

Posted by Gargi Dhore 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Pratiksha Sweety 2 years, 5 months ago

First we convert m/s 3*1000= 3000m 5*60= 300 second Speed=Distance/time 3000/ 300= 10 m/s Then we convert km/h 3 km/ 0.083h= 36km/h

ANSWER

A Body moves 6 m north. 8 m east and 10m vertically upwards, what is its resultant displacement from initial position

Posted by Kavya Tiwari 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Juhee Mishra 2 years, 5 months ago

18

Gaurav Swarnkar 2 years, 5 months ago

10 underroot 2 = 10(2)^1/2 = 10× 1.414 = 14.14 N-E....

ANSWER

Make a plan to go to a place by a vehicle .Take reading of odometer and speedometer after every 5 minutes till you reach your destination record this observation in tabular form .plot graph s between distance and time .state whether this motion is uniform of non uniform

Posted by Saif Khan Ali 2 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Saif Khan Ali 2 years, 5 months ago

Please can you tell me this according to class 9 fully .I have to do complete ans with explanation

Tannu Yadav 2 years, 5 months ago

Express 2.36+ 0.23 as a fraction in simplest form

ANSWER

8. A ball starts from rest and rolls down 16m down an inclined plane in 4 s. (a) What is the acceleration of the ball? (b) What is the velocity of the ball at the bottom of the incline?

Posted by Lavi Chauhan 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Pt Arnav Sharma 2 years, 5 months ago

accelerated motion ques u=0 t=4s s=16m a=? v=? for accelaration using s=ut+1/2at^2 subsituting values 16=0×4+1/2a×4×4 16=0+8a a=16/8 a=2m/s^2 for final velocity using v=u+at subsituting values v=0+2×4 v=8m/s

ANSWER

starting from rest on a lake accelerates in a straight line at constant rate of 3M / sec 2 for 8 sec how far does the boat travel during this time

Posted by Kunal Singh 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

When s-t graph is parallel to x axis the body is

Posted by Siva Kumar 2 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Pt Arnav Sharma 2 years, 5 months ago

body have constant speed

ANSWER

State and drive all the three equation of motion for uniformly accelerated motion along a straight line with the help of graph

Posted by Kunal Singh 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Given reason for the following observation (a) natural girls disapped with time without lacing away sold (b) we can get the smell of perform sitting server metals away

Posted by Johnson Minj 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

To write the hundred chemical compounds with molecular formula

Posted by Fahad Afzal 2 years, 5 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Name scientist who discovered cell

Posted by Chetna Gautam 2 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Akshra Akshu 2 years, 5 months ago

Robert hook in 1665

Divyanshi Singh 2 years, 5 months ago

Robert Hooke in 1665

Harshitsingh Singh 2 years, 5 months ago

Robert Hooke (1665)

Pratiksha Sweety 2 years, 5 months ago

Robert hooke

Bhavya 🥰❤️💖 2 years, 5 months ago

Robert Hooke discovered cell in 1665

ANSWER

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