This is a conservation of momentum question. Initial momentum of the system is the momentum of ball 1 plus the momentum of ball 2. The final momentum of the system should be 0 since the balls stand still after the collision.
mv + mv = 0
mv = -mv
(20)(20) = -(40)Vi
400 = -40Vi
Vi = -10
So ball 2 should travel at 10m/s to the left
The rate of energy radiated by the man is 3.86 x J/s. .
The amount of energy radiated by an object majorly depends on the area of its surface and its temperature. The is well explained in the Stefan-Boltzmann's law which states that:
Q(t) = Aeσ
where: Q is the quantity of heat radiated, A is the surface area of the object, e is the emmisivity of the object, σ is the Stefan-Boltzmann constant and T is the temperature of the object.
To determine the rate of energy radiated by the man in the given question;
= Aeσ
But A = 1.7 m², e = 0.4 and σ = 5.67 x J/s.
So that;
= 1.7 * 0.4 * 5.67 x
= 3.8556 x
= 3.86 x J/s.
Thus, the rate of energy radiated by the man is 3.86 x J/s. .
Learn more on energy radiation of objects by visiting: brainly.com/question/12550129
Answer:
Explanation:
We know that there is a relation between the speed of light ,frequency and wavelength.This relation can be given as where v is speed of light is frequency of light is wavelength of light
In first case we have given λ=655 nm
so using formula
Hz
In second case we have wavelength 515 nm so by using above formula
In third case we have wavelength 475 nm
so
The main resistive force that opposes the driving force when a vehicle is moving is Drag Force/ Air resistance. Air resistance is the frictional force exert by air on the moving body. Greater the velocity of the body, more it will experience air resistance. Air resistance tries to slow down the slow down the speed of the body. The force by engines tries to move it forward and drag force tries to move it in opposite direction. If the force by car engine is greater than the drag force, car will move forward.
This process is called a quantization error. It is the difference between the analog signal and digital values.
<h3>What is a quantization error?</h3>
Quantization error refers to the difference between analog signals and their closest digital values during the process of sampling.
This process (quantization error) involves an A/D converter, i.e., an analog to a digital converter (ADC).
The A/D converter is a type of converter that acts by capturing analog signals at given fixed time intervals.
Learn more about quantization error here:
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