Answer:
it depends if it is alpha ,beta or gamma
Explanation:
if alpha use paper
if beta use some clothing or aluminium
if it is gamma use lead
Answer:
0.36s, 2.3s
Explanation:
Let gravitational acceleration g = 9.81 m/s2. And let the throwing point as the ground 0 for the upward motion. The equation of motion for the rock leaving your hand can be written as the following:

where s = 4 m is the position at 4m above your hand.
is the initial speed of the rock when it leaves your hand. g = -9.81m/s2 is the deceleration because it's in the downward direction. And t it the time(s) it take to get to 4m, which we are looking for


t = 2.3 or t = 0.36
<u>Explanation of the properties of electron spin:</u>
Electron spin:
Electron spin is a quantum characteristic of electrons. It is a mode of angular momentum. The magnitude of this angular momentum is perpetual. If the electron spins clockwise on its axis, it is described as spin-up; counterclockwise is spin-down.
- Electron spin has representative s
- The electron spin quantum number has representative ms.
Electron pair:
Electron pair is also known as lewis pair. Lewis pair consists of two electrons that fill the same molecular orbital but have opposing spins. Gilbert N. Lewis introduced the electron pair idea in a 1916 article.
Answer:
1.507×10⁻⁴ T
Explanation:
a = 5 cm = 0.05 m
b = 7 cm = 0.07 m
j = 1 A/cm²
Distance from magnetic field = d = 10 cm = 0.1 m
μ₀ = Vacuum permeability = 4π×10⁻⁷ H/m
Magnetic of hollow cylinder

∴ Magnitude of the magnetic field at a distance d = 10 cm from the axis of the cylinder is 1.507×10⁻⁴ T
Answer:
This is a third class lever.
Explanation:
A third class lever is when the fulcrum is on one of the far ends, the load is on the other, and the effort is pushing up from the middle.