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Sai Krishna Nayak
Subject: Science
, asked 15 hours, 53 minutes ago
A heater of a power rating 1,000 W is used 1 hour everyday for 20 days. Find the cost of the energy consumed by the heater if the charge per unit of energy is Rs 2?
Hint:- 1 unit=1 kWh
P=1000 W= 1 KW
Time(t)= 1 x 20= 20 h
Answer
1
Sai Krishna Nayak
Subject: Science
, asked 15 hours, 56 minutes ago
An elevator weighing 1,000 kg is to be lifted up with a constant velocity of 0.10 m/s. What would be the power (in hp)delivered by the motor ?
Answer
1
Pavani Raju V S
Subject: Science
, asked 1 week, 2 days ago
The KE of a body moving with a speed of 10m/s is 30J. If its speed becomes 30m/s, its KE will be
a) 10 J
b) 90 J
c) 180 J
d) 270 J
Answer
2
Pavani Raju V S
Subject: Science
, asked 1 week, 3 days ago
work done when a force F=(i+2j+3k)N acting on a particle takes it from the point r1 = ( i+j+k) to the point r2= ( i - j + 2k) is
Answer
1
Praveena R.p.
Subject: Science
, asked 2 weeks ago
What is the difference between Potential Energy and Elastic Potential Energy?
Answer
2
Pavani Raju V S
Subject: Science
, asked 2 weeks ago
A ball is revolving in a horizontal circle by attaching it to a string. the velocity of a ball changes continuously. it means acceleration exist. can we say the tension force in string does not work on ball because acceleration exist? Explain.
Answer
1
Ayaansh Singh
Subject: Science
, asked 2 weeks, 2 days ago
Derive the formula for power delivered to a body. Prove that instantaneous power delivered to a body is given by the product of force and velocity of the body
Answer
1
Tavishi Khanna
Subject: Science
, asked 2 weeks, 2 days ago
Dear experts and friends,
I was just curious about something so I just wanted to ask a random question :)
Why do we say that we should switch on the geyser and warm up the water before taking a shower and when going to take the shower, we should switch off the geyser immediately before going in the shower as we could get electrocuted? (sorry for making the question so long xD) but I just wanted to ask that why is it possible that we MIGHT get electrocuted by going into the shower with the geyser ON?
Hope to get an answer soon!
Answer
1
Praveena R.p.
Subject: Science
, asked 2 weeks, 3 days ago
Sir there was a question in the work and energy's 1st class test..
And tht question was as follows:
Which of the following statements about work done by a force is incorrect?:
A) Work is done by a force only if the body moves towards the direction of the applied force.
B) Work done by a body is equal to the amount of energy gained or spent by the body.
C) Work done by a force can be 0 even if the object moves to a certain distance.
D) Work done by a force can be positive as well as negative.
Sir in this question the correct was (A) according to the test..
But it should be C ryt? coz work done by a force cannot be 0 even if the object moves to a certain distance!!
So C is the incorrect option..
But i didn't understand that how Option A is the correct ans..
Pls explain!!
Answer
1
Ms.arzin Qadri
Subject: Science
, asked 3 weeks, 4 days ago
convert 1kw to corresponding to joule
Answer
1
Ms.arzin Qadri
Subject: Science
, asked 3 weeks, 4 days ago
what is the work done by gravity on a ball rolling on horizontal ball experts please answer
Answer
1
Ms.arzin Qadri
Subject: Science
, asked 3 weeks, 4 days ago
calculate potential energy of an object of mass 20 kg thrown vertically up ward at 200m
Answer
3
Kingzang
Subject: Science
, asked 4 weeks, 1 day ago
How much work is done by a force of 5n in moving an object through a distance of 2m in the direction of the force slove the question
Answer
4
Ananya
Subject: Science
, asked on 30/8/20
find the speed of particle
Answer
1
Anushka Berwal
Subject: Science
, asked on 18/8/20
What does law of conservation of energy verify
Answer
3
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Next
What are you looking for?

Hint:- 1 unit=1 kWh

P=1000 W= 1 KW

Time(t)= 1 x 20= 20 h

a) 10 J

b) 90 J

c) 180 J

d) 270 J

I was just curious about something so I just wanted to ask a random question :)

Why do we say that we should switch on the geyser and warm up the water before taking a shower and when going to take the shower, we should switch off the geyser immediately before going in the shower as we could get electrocuted? (sorry for making the question so long xD) but I just wanted to ask that why is it possible that we MIGHT get electrocuted by going into the shower with the geyser ON?

Hope to get an answer soon!

And tht question was as follows:

Which of the following statements about work done by a force is incorrect?:

A) Work is done by a force only if the body moves towards the direction of the applied force.

B) Work done by a body is equal to the amount of energy gained or spent by the body.

C) Work done by a force can be 0 even if the object moves to a certain distance.

D) Work done by a force can be positive as well as negative.

Sir in this question the correct was (A) according to the test..

But it should be C ryt? coz work done by a force cannot be 0 even if the object moves to a certain distance!!

So C is the incorrect option..

But i didn't understand that how Option A is the correct ans..

Pls explain!!