Answer:
In the gold foil experiment, Rutherford fired alpha particles (which are nuclei of helium) at a thing gold foil, and then he observed the angular distribution of the scattered alpha particles beyond the foil.
He made the following observations:
- Most of the alpha particles passed through the foil mostly undeflected
- Some of the alpha particles were instead deflected at very large angles
- A few of the alpha particles were even reflected back to the original direction
According to these observations, he made the following conclusions:
- The vast majority of the space in an atom is empty, as most of the the alpha particles pass undeflected
- The atoms have a central nucleus containing a large positive charge, to explain the large deflections of some alpha particles
- The nucleus of the atom is very tiny and contains most of the mass of the atom, to explain the alpha particles reflected back
This experiment therefore contribute to improve the model of the atom: the previous model was the Thomson model (plum-pudding model), but the experiment proved that this was not the right model, and the experiment lead to a new model, in which the atom is believed to consists of a tiny, positive nucleus surrounded by negatively charged electrons orbiting around the nucleus at a very large distance from it.
Answer:
C
Explanation:
A Tsunami is usually the result of an earthquake under the sea
What
is the maximum distance the train can travel if it accelerates from
rest until it reaches its cruising speed and then runs at that speed for
15 minutes?
d = vo*t + 0.5*a*(t**2) ..........................(vo= initial speed = 0; a= acceleration; t=time, d = distance)
Vf = vo + a*t (final speed, in this case it will be the cruising speed)
Since vo = 0 (starts from rest)
t = Vf/a
d = 0 + 0.5*a*((Vf/a)**2)
d = (0.5/a)*(Vf)**2
a = 24545 miles/h2 = 10ft/s2
d1 = (0.5/24545 miles/h2)*(120 mi/h)**2 = 0.293 miles
From cruising speed, distance traveled after 15 minutes (0.25h)
v = d/t ...................> d2 =v*t = <span>120 mi/h (0.25h)</span> = 30 miles
Maximum distance the train can travel,
D = d1 + d2 = 0.293 + 30 miles = 30.293 miles
Answer:
Force is applied to the point where the can can't handle it and starts to get crushed
Explanation:
Answer:
Speed- 48m/s..........................................
