Answer:
40 mm
Explanation:
=Proper Length of rod = 2.05 m
Speed of rod = 6.01×10⁷ m/s
Length contraction
Final Length will be 2.01 m
So length that is contracted is 2.05-2.01 = 0.04 m
The length is contracted by 40 mm.
Answer:
A) ΔV = 1.237 V
B) K.E = 1.237 eV
Explanation:
B)
The initial kinetic energy of the electron is given by the following formula:
where,
K.E = Kinetic Energy of electron = ?
m = mass of elctron = 9.1 x 10⁻³¹ kg
v = speed of electron = 660000 m/s
Therefore,
K.E = 1.98 x 10⁻¹⁹ J
K.E = (1.98 x 10⁻¹⁹ J)()
<u>K.E = 1.237 eV</u>
A)
The energy applied by the potential difference must be equal to the kinetic energy of the electron, in order to stop it:
where,
e = charge on electron = 1.6 x 10⁻¹⁹ C
Therefore,
<u>ΔV = 1.237 V</u>
Answer:
<em>The second drop is 3.75 m above the ground</em>
Explanation:
<u>Free Fall Motion</u>
A free-falling object falls under the sole influence of gravity without air resistance.
If an object is dropped from rest in a free-falling motion, it falls with a constant acceleration called the acceleration of gravity, which value is .
The distance traveled by a dropped object is:
If we know the height h from which the object was dropped, we can find the time it takes fo hit the ground:
When the first drop touches the ground there are two more drops in the air: the second drop still traveling, and the third drop just released from the tap.
The total time taken for the first drop to reach the ground is:
Half of this time has taken the second drop to fall:
It has fallen a distance of:
Thus its height is:
h = 5 - 1.25 = 3.75
The second drop is 3.75 m above the ground
The filament used in light bulb is Tungsten(W).. It's a metal with melting point of about 3300 °C.
Answer:
Enhanced Green house effect
Explanation:
The paradox describes the inconsistency between the faint young Sun and the temperate climate on the early Earth. Despite low radiation by the sun of the early year, the Earth still maintained a temperate climate.
This paradox can be resolved by instigating changes in the atmospheric concentrations of greenhouse gases like ammonia (NH3), CH4, or CO2. This is referred to as enhanced green house effect.