Ernest Rutherford was the first scientist to develop the planetary model of the atom.
Answer:
Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2).
Answer:
v = 3.7 m/s
Explanation:
As the swing starts from rest, if we choose the lowest point of the trajectory to be the zero reference level for gravitational potential energy, and if we neglect air resistance, we can apply energy conservation as follows:
m. g. h = 1/2 m v²
The only unknown (let alone the speed) in the equation , is the height from which the swing is released.
At this point, the ropes make a 30⁰ angle with the vertical, so we can obtain the vertical length at this point as L cos 30⁰, appying simply cos definition.
As the height we are looking for is the difference respect from the vertical length L, we can simply write as follows:
h = L - Lcos 30⁰ = 5m -5m. 0.866 = 4.3 m
Replacing in the energy conservation equation, and solving for v, we get:
v = √2.g.(L-Lcos30⁰) = √2.9.8 m/s². 4.3 m =3.7 m/s
Answer:
B=1.89*10^{-4} T
Explanation:
First we have to calculate the electric force on the electron, and then we have to take into account that this force is equal to the force generated by the magnetic field.
The formula is
q: charge of the electron = 1.6*10^{-19}C
V: potential
d: separation between plates
This force must equal the Lorentz's force
But before we have to calculate the speed of the electron by using (me=9.1*10^{-31}kg)
Hence, we have
hope this helps!!
Answer:
I think thats the correct answer
Explanation:
