Answer:
a) KE = 0.0857Joules
b) height = 0.073m
Explanation:
The rotational inertia of the rod at an axis passing through the fixed end is given by:
I = Icm + my
I= 1/12 mL^2 + m(L/2)
I= 1/12 ×0.12×(0.75)^2 + 0.12× (0.75/2)^2
I = 5.625×10^-3 + 0.01688
I = 0.0225Kg/m^-2
a) KE = 1/2 Iw^2
Where I= rotational inertia
w= angular speed at lowest point
KE = 1/2 × 0.0225 ×(2.76)^2
KE= 0.0857 Joules
b) Ki + Ui = Kf + Uf
Ki = Uf - Ui = 0
mgh = K
0.0857= mgh
h = 0.0857/( 0.120× 9.8)
h = 0.0857/ 1.176
h = 0.073m
The time taken for the light to travel from the camera to someone standing 7 m away is 2.33×10¯⁸ s
Speed is simply defined as the distance travelled per unit time. Mathematically, it is expressed as:
<h3>Speed = distance / time </h3>
With the above formula, we can obtain the time taken for the light to travel from the camera to someone standing 7 m away. This can be obtained as follow:
Distance = 7 m
Speed of light = 3×10⁸ m/s
<h3>Time =?</h3>
Time = Distance / speed
Time = 7 / 3×10⁸
<h3>Time = 2.33×10¯⁸ s</h3>
Therefore, the time taken for the light to travel from the camera to someone standing 7 m away is 2.33×10¯⁸ s
Learn more: brainly.com/question/14988345
The transition zone between the crust and mantle is called as mohorovicic discontinuity.
The mohorovicic discontinuity was discovered by Andrija Mohorovicic in the year of 1909. The Moho lies at the depth of 35km beneath the continents and 8km beneath the oceanic crust. The Moho separates both the continental crust and the oceanic crust from underlying mantle. The Moho lies almost entirely within the lithosphere, only beneath the Mid Oceanic Ridge does it define lithosphere and asthenosphere boundary. Immediate above the Moho velocity of the P wave is 6km/sec and just below the Moho it becomes 8km/sec. Moho is characterised by up to 500km thick.
The Mohorovicic Discontinuity marks the lower limit of Earth's crust. It occurs at an average depth of about 8 kilometers beneath the ocean basins and 32 kilometers beneath continental surfaces. Mohorovicic was able to use his discovery to study thickness variations of the crust.
Mohorovicic discontinuity is the layer which is between the earth's crust and mantle. It's density ranges from 3.3 to 3.7.
learn more about mohorovicic discontinuity from here: brainly.com/question/2887207
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Energy comes from the Sun, plants and animals that we eat, to provide us with nutrients we need for energy.
