The first law of thermodynamics states that the change in the internal energy of a system equals the net heat transfer into the system minus the net work done by the system. This is another way of saying that energy can neither be created nor destroyed, but it can be converted from one form to another form.
A tea kettle that is warmed on an electric stove is receiving heat energy, this heat energy increases the kinetic energy of the water particles in the kettle and makes them to move faster. As time goes on, the water begins to turn into vapors. The heat energy that is released into the system is been used to carry out the work of evaporation and the whistling of the kettle.
Answer:
An unmoving object will remain unmoving and a moving object in motion will continue to be in motion with the same velocity unless an external force acts upon it.
Answer: a) 14*10^3 V; b)2.4 *10^-3 m^2; c)6.07*10^-12 F
Explanation: In order to explain this problem we have to consider, the following expressions:
V=E*d the difference of potencial in a capacitor is equal to the electric field multiply the separacion between the plates then,
V= 4*10^6*3.5*10^-3=14*10^3 V
We also know that the electric field in a parallel plates capacitor is given by:
E=σ/εo where σ is Q/A ( charge/area)
E=Q/(A*εo)=85*10^-9/(A*8.85*10^-12) then
A=85*10^-9/(8.85*10^-12*4*10^6)=2.4 *10^-3 m^2
Finally, the capacitance is given by:
C= εo*A/d
C=8.85*10^-12*2.4*10^-3/3.5*10^-3=6.07*10^-12 F
The variable <span><span>xx</span>x</span><span> is often used to represent the horizontal position. The variable y</span> is often used to represent the vertical <span>The airplane passenger’s initial position is </span><span><span>x_0=6.0\text{ m}<span><span>x<span><span>0</span><span></span></span></span>=6.0<span> m</span></span></span>x, start subscript, 0, end subscript, equals, 6, point, 0, space, m</span><span> and his final position is </span><span><span>x_f=2.0\text{ m}<span><span>x<span><span>f</span><span></span></span></span>=2.0<span> m</span></span></span>x, start subscript, f, end subscript, equals, 2, point, 0, space, m</span>, so his displacement can be found as follows,<span>Δx=<span>xf</span>−<span>x0</span>=2.0 m−6.0 m=−4.0 m</span><span>. His displacement is negative because his motion is toward the rear of the plane, or in the negative x direction in our coordinate system.</span>position.
I think it’s when the sun explodes because since we need to the sun I think the human population will fall out. also a huge war, a meteoroid huge as the one that killed the dinosaurs comes down, there is so much ways on how the human population can stop growing. hope this help at least!
