Answer:
V= 1.2m/s
Explanation:
Since both spheres fall to an equidistant center, both spheres travel a distance of 0.4m
This is:
The 0.05kg sphere falls 0.4m while the 0.02kg sphere goes up 0.4m
The decrease in Potential Energy is given by:
The moment of inertia for the entire system is given by:
In this way the kinetic energy is given by
Answer:
Second Option: it suddenly drops to zero
Explanation:
Superconductors are resistance free materials that enable (allow) <u>electricity conduction (i.e. electron transportation between atoms)</u>.
As the superconductor temperature is gradually lowered, eventually a Critical Temperature is reached, where the <u>superconductor electrical resistivity</u> suddenly drops to zero. Such drop is so fast, that can be described as a complete matter-phase transition. This is in contrast with typical conductors,<em> where with gradually decreasing temperature there is also a gradually decreasing resistivity (which is also true at temperatures of near absolute zero). </em>
Thus the correct answer is the Second Option: it suddenly drops to zero
Answer:
is weaker than the electromagnetic force
Explanation:
The weak force or weak nuclear force acts between elementary particles.
Weak nuclear force is important in the reaction speed of some nuclear reactions that occur in stars. It is also present at the origin of volcanic explosions.
The weak force is a short-range force, less than a billionth of a millimeter: 10-13mm. At a greater distance, the intensity of this force is already negligible.
If the weak force had a value of 1,
the electromagnetic force would have a value of 1,000
and the strong force would be worth 100,000,000,000
Although it is vastly weaker than the other two nuclear forces, the weak force is important in that it enables the Sun and stars to produce light and energy.
The weak force causes a type of radioactive decay called "beta decay." An example of beta decay is the decay of the neutron when it becomes 1 proton + 1 electron + 1 neutrino
Answer:
V = 7.5 m/s
Explanation:
Projectile motion is a two dimensional motion experienced by an object or particle that is subjected near the surface of the Earth and moves along a curved path under the influence of gravity only. The path followed by projectile motion is called projectile path.
As the cat followed the projectile path, and we know that in projectile motion the horizontal component of the velocity remains constant throughout its motion. So there is no acceleration along horizontal path.
Given data :
Height = y = 0.65 m
Horizontal distance = x = 2.7 m
Gravitational acceleration = g = 9.81 m/s²
Velocity when cat slid off the table = V = ?
As the cat slides off horizontally, So there is no vertical component of velocity or vertical component of velocity is zero.
Using 2nd equation of motion
y = 0.5 gt²
0.65 = 0.5*9.8*t²
t² = 0.1326
t = 0.36 s
Velocity when cat slid off the table = V = x / t
V = 2.7 / 0.36
V = 7.5 m/s
The angular momentum of a rotation object is the product of its moment of inertia and its angular velocity:
L = Iω
L is the angular momentum, I is the moment of inertia, and ω is the angular velocity.
Apply the conservation of angular momentum. The total angular momentum before disks A and B are joined is:
L_{before} = (3.3)(6.6) + B(-9.3)
L_{before} = -9.3B+21.78
where B is the moment of inertia of disk B.
The total angular momentum after the disks are joined is:
L_{after} = (3.3+B)(-2.1)
L_{after} = -2.1B-6.93
L_{before} = L_{after}
-9.3B + 21.78 = -2.1B - 6.93
B = 4.0kg·m²
The moment of inertia of disk B is 4.0kg·m²
