Answer:

Explanation:
As per first law of thermodynamics we know that
heat absorbed = change in internal energy + Work done
so we have


so work done is given as


now we know that at constant pressure the work done is given as




or we have

Answer:
<em>The object-Earth system is open</em>

Explanation:
<u>Accelerated Motion
</u>
When an object is released in free air (with no other forces than the gravity), it describes a free-fall motion and the formulas include the acceleration of gravity as part of the calculations. But when there is another external force, then the acceleration is not the gravity, but the result of the net force exerted on the mass of the object.
By definition, an open system includes the exchange of energy from and to the surroundings, that is why all systems surrounding our planet are considered as open systems. In our case, the object is interacting with the planet's gravity and there is some other external force, which will be computed later. The object-Earth system is open.
If the object starts from rest, its initial speed is zero, and

where a is the acceleration and t is the time. The distance traveled is given by
:

From the two above equations, we find that:

Solving for a



It means the net force is

The object's weight is

This means there is some external force acting upwards delaying the object's fall of a magnitude of

Answer:
A. Zero
Explanation:
The force on a coil of N turns, enclosing an area, A and carrying a current I in the presence of a magnetic field B, is :
F = N * I * A * B * sinθ
Where θ is the angle between the normal of the enclosed area and the magnetic field.
Since the normal of the area is parallel to the magnetic field, θ = 0
Hence:
F = NIABsin0
F = 0 or Zero
My answer is in the picture
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Answer:
v = 6.95 m/s
Explanation:
Given that,
A diver is on a board 1.80 m above the water, s = 1.8 m
The initial speed of the diver, u = 3.62 m/s
Let v is the speed with which she hit the water. It will move under the action of gravity. Using the equation of motion as follows :

So, she will hit the water with a speed of 6.95 m/s.