The average force is -212.4 N
Explanation:
We can solve this problem by using the impulse theorem, which states that the impulse exerted on the object (the product of the force exerted and the time) is equal to the change in momentum of the object:
where
F is the net force on the object
is the time
m is the mass
is the change in velocity
In this problem, we have:
m = 26.3 kg
Solving for F, we find
where the negative sign indicates that the direction of the force is opposite to the motion of the object.
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Answer:
a) conservation of the angular momentum
b) As a consequence of the interaction between particles.
Explanation:
A star is formed in a molecular cloud of gas and dust, mainly composed of hydrogen and helium. The Nebular Theory establishes, for the formation of the solar system, that the cloud starts to collapse under its own gravity when it receives a shock wave from a near event, for example, a supernova explosion. That results in the cloud breaking in small pieces, and those pieces constitute a possible future star.
Then it begins to accrete and rotate as a consequence of the angular momentum. In the center of that disk when it reaches the necessary temperature and pressure a protostar will born.
However, as the solar nebular condenses in the center due to its own gravity, the density increases, allowing more collisions between the particles that are in the nebula (atoms, free protons, etc), so the pressure rises and the temperature increases.
Answer:
83 protons 126 neutrons. Bismuth Atom
Explanation:
The largest number of stable nuclei which could ever exist is the bismuth atom. A nuclei which is higher than that 83 protons is unstable and the nucleus will eventually breakdown through radioactivity.
To solve this problem we will use the concept of the Doppler effect applied to the speed of blood, the speed of sound in the blood and the original frequency. This relationship will also be extrapolated to the frequency given by the detector and measured the change in frequencies through the beat frequency. So:
Where
= Frequency of the blood flow
f = Frequency of the original signal
= Speed of the blood flow
= Speed of sound in blood
Now calculating the beat frequency is
Replacing this latest value we have that,
Replacing we have,
Therefore the beat frequency is 136.36Hz