Answer:
Workdone W = 1465.1 J
Explanation:
The weight of the water = density × volume
weight of the water = 1000 kg/m³ × 100 cm³
weight of the water = 1000 kg/m³ × 0.0001 m³
weight of the water = 0.1 kg
weight of the bucket = 5 kg
weight of the rope =
=
Leakage =
=
Total weight =
=
Force = wg
Force = ()g
Force = 9.8 ()
Finally; the amount of work spent in lifting the bucket, rope, and water is calculated as follows:
H = mc∆T
where, H=heat energy
c = SHC
H = 2*921*(40-20)
H = 36840J
H = 36.84KJ
The energy transferred to it is 36.84KJ
Answer:
No
Explanation:
The supplied information about the object and train is incomplete. Acceleration is the rate at which the velocity of a body changes with time. Here the velocity and time is not given
The best method to use in prevention of self-demagnetization of a permanent magnet is by use of a keeper. Keepers were also commonly known as amateurs. They help in storing magnets safely, especially those that have low coercivity ( magnets that are extremely susceptible to stray fields).
Hope It Helps!
The last one is correct (D)