Answer:
1879.33J
874.1W
Explanation:
Given parameters:
Distance covered = 2.91m
Time taken = 2.15s
Mass of Bart = 65.9kg
Unknown:
Work done = ?
Power rating = ?
Solution:
Here, the work done is related to the the potential energy in climbing this flight of stairs.
Work done = Potential energy = mgH
where m is the mass
g is the acceleration due to gravity
H is the height
Work done = 65.9 x 9.8 x 2.91 = 1879.33J
Power is defined as the rate at which work is being done.
Power = 
= 
= 874.1W
1) dc
2) ac
Because my dad said so
Answer:
The number of revolutions turned by the centrifuge is 8250 revolutions.
Explanation:
Given;
number of revolution per minutes, ω = 15000 rpm
time of motion, t = 330 s = 5.5 minutes
The number of revolutions turned by the centrifuge is given by;
Therefore, the number of revolutions turned by the centrifuge is 8250 revolutions.
Answer:
It would take 30 turns
Explanation:1.1 times 30=33
<h2>
C. 20 T</h2>
The strength of the magnetic field is equal to 20 Tesla.
<h3>
Explanation:</h3>
Given:
Induced potential difference = V = 12 V
Length of wire = L = 0.20 m
Speed of the moving wire = V = 3.0 m/s
Magnetic field strength = B = ?
A conductor, placed in a uniform magnetic field; when moved at a constant speed with respect to the field, leads to a changing magnetic flux, generating an electromotive force (EMF). Using, Faraday's law of magnetic induction, a moving conductor's induced EMF in terms of the magnetic field strength is given by :
......................(1)
where
E = Induced potential difference (EMF)
L = Length of the conductor
V = Speed of the conductor moved with respect to the magnetic field
B = Strength of uniform magnetic field
Rewriting equation (1) for B, we get
The strength of magnetic field is equal to 20 Tesla.
