A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up ? Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate. Take g = 9.8 ms−2 :
Option 1)
2.45×10−3 kg |
Option 2)
6.45×10−3 kg |
Option 3)
9.89×10−3 kg |
Option 4)
12.89×10−3 kg
|
Find out the correct meaning of the following phrase
Bite off more than you can chew
To take a huge and difficult task
To eat more than you can digest
To let the expenditure exceed the resources
To work very hard
Find out the appropriate words to fill in the blank:
The drunken man teased women and was consequentially ___ by them
Pacified
Appeased
Neglected
Castigated
The supply voltage to a room is 120 V. The resistance of the lead wires is 6 . A 60 W bulb is already switched on. What is the decrease of voltage across the bulb, when a 240 W heater is switched on in parallel to the bulb?
10.04 Volt
Zero Volt
2.9 Volt
13.3 Volt