When particles in a substance slow down, we can infer that the object is getting colder. Why we can infer this:
1. Kinetic energy, is energy due to motion, therefore if there is no motion, there is no kinetic energy.
2. The colder an object get, the closer it becomes to having it's particles stopping completely, eventually at the absolute zero.
3. As kinetic energy increases, particles move faster. Kinetic energy usually increases when an object gets warmer. As kinetic energy decreases, particles move slower. Kinetic energy usually decreases when an object gets colder.
So, with this information, we now how and why the kinetic energy slows down.
Answer:
It is the best angular resolution the telescope could achieve with perfect optical quality and in the absence of atmospheric distortion.
Explanation:
When looking through a telescope or microscope due to imperfections of the lenses or misalignment, two sources may appear. The angular space between these two sources can be found by calculating the wavelength of the light observed divided by the diameter of the telescope.
Answer: 29.50 m
Explanation: In order to calculate the higher accelation to stop a train without moving the crates inside the wagon which is traveling at constat speed we have to use the second Newton law so that:
f=μ*N the friction force is equal to coefficient of static friction multiply the normal force (m*g).
f=m.a=μ*N= m*a= μ*m*g= m*a
then
a=μ*g=0.32*9.8m/s^2= 3.14 m/s^2
With this value we can determine the short distance to stop the train
as follows:
x= vo*t- (a/2)* t^2
Vf=0= vo-a*t then t=vo/a
Finally; x=vo*vo/a-a/2*(vo/a)^2=vo^2/2a= (49*1000/3600)^2/(2*3.14)=29.50 m
Answer:
= = 140 m / s
Explanation:
This is a projectile launch, in this case the components of the initial velocity are seen
Since there is no rice in the X axis, so the velocity is vx, it must be constant, at all times
= = 140 m / s
The vertical component of velocity changes due to having applied the gravity fiate
= - g t
Answer: the number protons stayed the same.
Explanation: an isotope has equal number of protons but different number of neutrons resulting in different atomic mass but the same chemical properties.