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Devhuti
Subject: Science
, asked on 16/1/18
RITWICK'S FAMILY RECEIVED A HEAVY ELECTRICITY BILL AND DECIDED NOT TO PAY IT. HIS FRIEND SUJOY EXPLAINED THEM THE IMPORTANCE OF PAYING ALL BILLS ON TIME AND SUGGESTED SOME METHODS TO REDUCE THE UNITS CONSUMED IN FUTURE.
A) WRITE THE COMMERCIAL UNIT OF ELECTRICAL ENERGY.
B) WHAT IS ITS RELATION WITH THE SI UNIT OF ENERGY?
C) WHAT VALUE OF SUJOY DO YOU OBSERVE FROM HIS SUGGESTIONS ?
D) LIST ANY TWO WAYS YOU PRACTISE AT HOME TO SAVE ELECTRICITY?
Answer
1
Son Ser
Subject: Science
, asked on 16/1/18
Plzz fast i have exams tomorrow. .show full calculation. Dont provide any link plzzz
Q). Find equivalent resistance.
Answer
2
Mohd Anas Khan
Subject: Science
, asked on 15/1/18
Solve this:
(1) a. Define kinetic energy
b. Give two example from your daily life where you can see kinetic energy is doing work.
c. The kinetic energy of an object of mass m, moving with a velocity of 5ms
^{-1}
is 25 J. What will be its kinetic energy if its velocity is double ?
(2) Write any one difference between annelids and arthropoda giving one example of each.
Answer
5
Harsh Agarwal
Subject: Science
, asked on 15/1/18
A light and a heavy object have the same momentum find out the ratio of their kinetic energies. Which one has a larger kinetic energy?
Answer
1
Rishika
Subject: Science
, asked on 14/1/18
Work and energy...ans asap please
Answer
1
Rishika
Subject: Science
, asked on 14/1/18
Q. A sound wave has a frequency of 2.5 KHz and 14 cm wavelength . How long will it take to travel 2 km?
Answer
1
Rishika
Subject: Science
, asked on 14/1/18
This question please...... Asap ... Thanks...
10.
A sound wave travels at a speed of 339 m
${s}^{-1}$
. If its wavelength is 1.5 cm. What is the frequency of the wave ? Will it be audible ?
Answer
3
Rishika
Subject: Science
, asked on 14/1/18
Q. The volume of a 500 g sealed packet is 350 cubic cm. Will the packet float or sink in water if the density of water is 1 g
$c{m}^{-3}$
?
Q. A stone of mass 2 kg is falling from rest from the top of the hill. What will be its kinetic energy after 5 seconds?
Answer
1
Rishika
Subject: Science
, asked on 14/1/18
an object of mass 1 kg possesses a kinetic energy of 4 jules if the speed is increased by 50% what is it new kinetic energy
Answer
2
Kamalika Bhowmik
Subject: Science
, asked on 13/1/18
what do u mean by the term pseudo force?
Answer
1
Devhuti
Subject: Science
, asked on 5/1/18
the linear momentum of a body of mass 2 kg is 16kg ms
^{-1}
what is its kinetic energy
Answer
1
Devhuti
Subject: Science
, asked on 5/1/18
find the velocity when a 2 kg ball is dropped from a height from 10 m (g=10ms
^{-1}
)
Answer
1
Devhuti
Subject: Science
, asked on 4/1/18
a 5 kg ball is thrown up with a speed of 10m/s.
a) find its kinetic energy at the time of throw
b) find its potential energy when it reaches the highest point
Answer
2
Devhuti
Subject: Science
, asked on 4/1/18
a billiards player hits a ball of mass m gram the ball acquires a velocity v . what is work done by the player on the ball
Answer
2
Devhuti
Subject: Science
, asked on 4/1/18
the body of mass 6 kg is now at height of 10 m find the work done
Answer
2
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What are you looking for?

A) WRITE THE COMMERCIAL UNIT OF ELECTRICAL ENERGY.

B) WHAT IS ITS RELATION WITH THE SI UNIT OF ENERGY?

C) WHAT VALUE OF SUJOY DO YOU OBSERVE FROM HIS SUGGESTIONS ?

D) LIST ANY TWO WAYS YOU PRACTISE AT HOME TO SAVE ELECTRICITY?

Q). Find equivalent resistance.

Solve this:(1) a. Define kinetic energy

b. Give two example from your daily life where you can see kinetic energy is doing work.

c. The kinetic energy of an object of mass m, moving with a velocity of 5ms

^{-1}is 25 J. What will be its kinetic energy if its velocity is double ?(2) Write any one difference between annelids and arthropoda giving one example of each.

Q. A sound wave has a frequency of 2.5 KHz and 14 cm wavelength . How long will it take to travel 2 km?

10. A sound wave travels at a speed of 339 m${s}^{-1}$. If its wavelength is 1.5 cm. What is the frequency of the wave ? Will it be audible ?

Q. The volume of a 500 g sealed packet is 350 cubic cm. Will the packet float or sink in water if the density of water is 1 g $c{m}^{-3}$?

Q. A stone of mass 2 kg is falling from rest from the top of the hill. What will be its kinetic energy after 5 seconds?

^{-1}what is its kinetic energy^{-1})a) find its kinetic energy at the time of throw

b) find its potential energy when it reaches the highest point