Answer:
rhastuutse5r says he n and happiness of
Explanation:
UKDIAMOND is a great place to live and live and live in the world best friend tum jio hjaro and happiness of the day and the day of the day of the day of the day of the day of the day of 2nd century and the day of the day of
They both are produced by two kinds of charges
Answer:
Correct answer: V = 18.43 m/s
Explanation:
Let be initial velocity (speed) V₀ and the current speed at some point V
At start, the box had kinetic energy which is equal to the total energy.
Ek₁ = E = m v₀²/2 = 40 · 20²/2 = 8,000 J
At the ramp point 3m high the box had potential energy:
Ep = m · g · h = 40 · 10 · 3 = 1,200 J we took that g= 10 m/s²
The total energy at any time is equal :
E = Ek + Ep ⇒ Ek = E - Ep = 8,000 - 1,200 = 6,800 J
Ek = m V²/2 ⇒ V = √2 · Ek/m = √ 2 · 6,800/40 = √340 = 18.43 m/s
V = 18.43 m/s
God is with you!!!
Answer:
The formation of a rainbow is more a demonstration of the wave-like behavior of light.
Explanation:
A rainbow is caused by the interaction of sunlight with atmospheric conditions. A rainbow formation results from the refraction and reflection of light due to changes in the light's wavelength direction. Naturally, light enters a water droplet, slowing down and bending as it goes from air to denser water in a refraction as if "bent." Then light reflects off the inside of the droplet, separating into its component wavelengths or colors. With light exiting from the droplet, a rainbow is formed.
<span>5020 Joules.
The maximum theoretical efficiency of an heat engine is
e = 1 - Tc/Th
where
e = efficiency
Tc = cold temperature (absolute)
Th = hot temperature (absolute)
So let's convert the temperatures from C to K.
Tc = 20 + 273.15 = 293.15 K
Th = 600 + 273.15 = 873.15 K
And substitute the values into the formula.
e = 1 - 293.15/873.15
e = 1 - 0.335738418
e = 0.664261582
Since our engine is only operating at 30% of this efficiency, the actual efficiency is
0.3 * 0.664261582 = 0.199278474
So in order to do 1000 J of work, 1000 J / 0.199278474 = 5018.103448 J of energy must be extracted from the hot reservoir. Rounding to 3 significant figures gives 5020 Joules.</span>
