Answer:
D. the third law of thermodynamics
Explanation:
As per third law of thermodynamics we know that entropy of a perfect crystal comes to zero when the temperature of the crystal reaches to absolute zero.
So as per the theory of entropy we know that entropy of a system cannot be zero as it will reach zero then system will not exist.
So here we can say that
As per third law it is not possible to achieve zero kelvin or absolute zero temperature because at that temperature the entropy will become zero and then the system will not exist in that case.
So here we can say the correct answer will be
D. the third law of thermodynamics
B).force
C).gravity
D).distance
An increase in the velocity of an object will increase the momentum of the object.
The momentum of an object is determined from the product of mass and velocity of an object.
P = mv
where
Thus, an increase in the velocity of an object will increase the momentum of the object.
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Answer:
a. velocity. PLATO USERS
Explanation:
Answer:
12 A
Explanation:
Voltage, V = 120 V
Resistance, R 10 ohm
By using ohm's law
V = i x R
where, i is the current
i = V / R
i = 120 / 10
i = 12 A
thus, the current is 12 A.
Gravitational potential energy increases; kinetic energy increases.
B.
Kinetic energy equals gravitational potential energy.
C.
Kinetic energy increases; gravitational potential energy decreases.
D.
The mass of the ball is required to answer this.
The ball originally contains potential energy and no kinetic energy, therefore we can use the theory of conservation of mechanical energy. Its total energy, which is made up of the KE and PE, is constant and equal to its starting PE as it falls. Thus, option C is correct.
As the ball falls toward the ground, its gravitational potential energy is transformed into kinetic energy. The kinetic energy of the ball will increase as it accelerates until it collides with something. The ball's collision generates kinetic energy, which is transformed into several forms of energy.
As it rises, the ball's speed slows until the very apex of its motion, where it briefly pauses. At the peak, it accelerates at -9.8 m/s2.
Therefore, A ball is thrown up into the air, yet although though it rises into the air, the direction, and velocity of the ball are actually downward.
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Mechanical waves are oscillation of matter, they are important because they all transfer energy from one place to another. There are 2 types of mechanical waves. A transverse wave where the particles vibrate perpendicular to the direction of energy travel and a longitudinal wave where particle vibrations are parallel to the direction of the energy transfer.
I hope it helps, Regards.
B. The teeth on both the pinion and the rack are helical gears
C. A large pinion means the number of turns of the steering wheel is increased
D. The steering ratio is the same on all vehicles
Answer:
ω = √(2T / (mL))
Explanation:
(a) Draw a free body diagram of the mass. There are two tension forces, one pulling down and left, the other pulling down and right.
The x-components of the tension forces cancel each other out, so the net force is in the y direction:
∑F = -2T sin θ, where θ is the angle from the horizontal.
For small angles, sin θ ≈ tan θ.
∑F = -2T tan θ
∑F = -2T (Δy / L)
(b) For a spring, the restoring force is F = -kx, and the frequency is ω = √(k/m). (This is derived by solving a second order differential equation.)
In this case, k = 2T/L, so the frequency is:
ω = √((2T/L) / m)
ω = √(2T / (mL))