Answer:
"h" signifies Planck's constant
Explanation:
In the equation energy E = h X v
The "h" there signifies Planck's constant
Planck's constant is a value, that shows the rate at which the energy of a photon increases/decreases, as the frequency of its electromagnetic wave changes.
It was named after Max Planck who discovered this unique relationship between the energy of a light wave and its frequency.
Planck's constant, "h" is usually expressed in Joules second
Planck's constant = 
First law of motion<span>- sometimes referred to as the </span>law<span> of inertia. An object at rest stays at rest and an object in </span>motion<span> stays in </span>motion<span> with the same speed and in the same direction unless acted upon by an unbalanced force.</span>
Answer:
v = 158 m / s
Explanation:
In this kinematic problem they give us the acceleration of the body, the position and speed of the initial moment, let's use the definition of acceleration
a = dv / dt
dv = a dt
We integrate
∫ d v = ∫ (2t + 1) dt
v = 2 (2t²) + 1t
We evaluate between the initial time t = 0 that has speed (vo) 8 m/s and the final time t with speed v
v -8 = 4t2 + t
We already have the velocity formula as a function of time, let's calculate for t = 6 s
v = 8 + 4 6² +6
v = 158 m / s
