Answer:
H = 54.37
Explanation:
given,
lead ball attached at = 1.70 m
rate of revolution = 3 revolution/sec
height above the ground = 2 m
circumference of the circle = 2 π r
= 2 x π x 1.7
= 10.68 m
v = 32.04 m/s
using conservation of energy
H = 54.37
the maximum height reached by the ball is equal to H = 54.37
Answer:
As the skydiver falls to the Earth, she experiences positive acceleration only due to gravity.
Explanation:
As the skydiver falls to the Earth, she experiences friction in the form of air resistance which tries to slow her down and is proportional to the her velocity. So it cannot have a positive acceleration as it acts in opposite direction to slow her down.
Inertia during skydiving is experienced when we open an parachute, the parachute slows down the speed of are descent hence changing our inertia of motion with a velocity.
Only the Earth's, gravitational field has an positive acceleration as it pulls us towards the Earth, hence increasing our velocity.
Answer:
The number is
Explanation:
From the question we are told that
The wavelength is
The length of the glass plates is
The distance between the plates (radius of wire ) =
Generally the condition for constructive interference in a film is mathematically represented as
Where t is the thickness of the separation between the glass i.e
t = 0 at the edge where the glasses are touching each other and
t = 2d at the edge where the glasses are separated by the wire
m is the order of the fringe it starts from 0, 1 , 2 ...
So
=>
=>
given that we start counting m from zero
it means that the number of bright fringes that would appear is
=>
=>
The correct is 72 watt
We know that formula of power is
so putting the value of Voltage and Resistance in Formula of power so we get
What is Power?
Electric power is the rate at which an electric circuit transfers electrical energy per unit time.
Typically, electricity is generated by generators, but it can also be supplied by sources such as electric batteries. The electric power industry typically distributes it via an electric power grid to businesses and homes (as domestic mains electricity).
Transmission lines allow electric power to be delivered over long distances and used for high-efficiency applications such as motion, light, or heat. Electric charges are converted to other forms of energy when they pass through an electric potential difference (voltage).
To learn more about Power from the given link:
brainly.com/question/2333114
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Answer:
The formula for induced EMF is ε = BLv
The B is the magnetic field of the earth. I will solve this problem with a value of 1 X 10-4 T for the accepted value of the earths magnetic field. However, with that said, your book may use a different value. If that is the case, this answer will be wrong, but the formula works. All you will need to to is find the value for the earth's magnetic field that your book wants you to use, and substitute for 1 X 10-4 T.
ε = BLv
ε = (1 X 10-4)(1.8 X 104)(7.8 X 103) = 14040 V
Again, if your book does not like this answer, use this equation
ε = (B)(1.8 X 104)(7.8 X 103) and just plug in a different value for B found in your text