MAKE ME...................................................................
F = ma
F 1500N
m = 100 kg
1500 = 100 * a
Solve for a.
Answer:
An electron in the third shell has more energy than an electron in the second shell and An electron in the first shell has more energy than an electron in the second shell.
Explanation:
- Calcium has 20 electrons.
- Calcium does not "borrow" electrons. Calcium "donates" 2 electrons.
- Calcium ion (Ca2+) has 18 electron
- Calcium has 2 valence electrons.
- The element Ca, so calcium, has 20 electrons (so it also has 20 protons) this means that it has 2 electrons in its outer orbit, its relative atomic mass is 40.
Answer:
the moment of inertia with the arms extended is Io and when the arms are lowered the moment
I₀/I > 1 ⇒ w > w₀
Explanation:
The angular momentum is conserved if the external torques in the system are zero, this is achieved because the friction with the ice is very small,
L₀ = L_f
I₀ w₀ = I w
w = w₀
where we see that the angular velocity changes according to the relation of the angular moments, if we approximate the body as a cylinder with two point charges, weight of the arms
I₀ = I_cylinder + 2 m r²
where r is the distance from the center of mass of the arms to the axis of rotation, the moment of inertia of the cylinder does not change, therefore changing the distance of the arms changes the moment of inertia.
If we say that the moment of inertia with the arms extended is Io and when the arms are lowered the moment will be
I <I₀
I₀/I > 1 ⇒ w > w₀
therefore the angular velocity (rotations) must increase
in this way the skater can adjust his spin speed to the musician.
Answer:
A because it is the most affective way to do it
Explanation: