Answer:
he metastability of the standard model to which current data points implies that we live in a “false vacuum” and that there is a global minimum of the Higgs field at high energy. Our false emptiness, by tunnel effect, can travel to true vacuum.
Explanation:
The theory of the false vacuum has been used to explain what existed in the universe before the Big Bang was produced, since when this energy stored in a small region is released, the false emptiness is supposed to disintegrate.
It has been proposed that our universe is currently, in fact, in a state of false emptiness, which could be transformed, by means of a tunnel effect, into true or authentic vacuum.
If so, the transition to this would occur in the form of a bubble that would appear at any point in space and that would immediately begin to expand at the speed of light, turning the false vacuum into true vacuum, so that no one If you find out of that bubble, you may notice it.
The net force acting on the refrigerator is 400 N to the right.
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FURTHER EXPLANATION</h3>
The net force or resultant force is the sum of all the forces acting on a body or an object in x and y axes.
- Forces along the y-axis The forces that usually act on an object vertically (in the y-axis) are: gravitational force which is a downward force and the normal force which is an upward (perpendicular) force exerted by a surface on an object resting above it that keeps the object from falling.
- Forces along the x-axis These include the force or forces applied to cause a left or right motion of an object along the horizontal plane (called the Applied Force) and the force that opposes the motion or friction.
In this problem the forces acting on the x and y - axes can be determined:
Along the x-axis:
- gravitational force = -1960 N
- normal force = +1960 N
- Net force = -1960 N + 1960 N = 0
The gravitational force is the weight of the object obtained by multiplying the mass of the object (in kg) with the acceleration due to gravity, 9.8 m/s^2. It is given a negative (-) sign to indicate that it is a downward force.
Since the object is not falling through the surface, it can be assumed that the gravitational force and normal force are balanced. Hence, the size of the normal force is the same as the gravitational force but with the opposite direction indicated by the + sign for an upward force.
The forces along the x-axis are balanced (i.e. net force is zero) so the object neither moves upward or downward.
Along the y-axis
- applied force = +400 N
- friction = 0
- Net force = +400 N + 0 = +400 N
The applied force is +400 N. It is given a + sign to indicate that its direction is to the right.
The friction, as mentioned in the problem, is set to zero or "turned off".
The net force along the y-axis is +400. The forces are unbalanced so the object will move to the right as force is applied to it.
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Keywords: net force, resultant force
Answer:
Q = 25092 J
Explanation:
Mass of water is 2 kg
Water has cooled from 40 °C to 37 °C.
It is required to find the energy has left the water. The heat left by the water is given by :
c is specific heat capacity, c = 4182 J/kg°C
So,
So, the 25092 amount of heat has left the water.
The mass of a is smaller than the mass of b.