Answer:
https://engineering.oregonstate.edu/momentum/k12/july04/index.html
Explanation:
read that it will help u (:
Answer:
a)52.58 m/s
b)56.13°
Explanation:
assume the upward direction as positive
x-component of the velocity = 29.3×cos33.6°=24.40 m/s (remain constant)
y-component of the velocity which is -29.3sin33.6°= -16.21 m/s
time of flight = 68.3/24.40= 2.7991 seconds
now, we can obtain final velocity in y-direction
![v_f_y= v_i_y-gt](https://tex.z-dn.net/?f=v_f_y%3D%20v_i_y-gt)
![v_f_y=-16.21-(-9.8)×2.7991](https://tex.z-dn.net/?f=v_f_y%3D-16.21-%28-9.8%29%C3%972.7991)
=43.66 m/s
![v_0=\sqrt{29.3^2+43.66^2}](https://tex.z-dn.net/?f=v_0%3D%5Csqrt%7B29.3%5E2%2B43.66%5E2%7D)
=52.58 m/s
for direction
![tan^{-1}\frac{43.66}{29.3}](https://tex.z-dn.net/?f=tan%5E%7B-1%7D%5Cfrac%7B43.66%7D%7B29.3%7D)
56.13° from the horizontal
As per Newton's II law we know that
![F = \frac{dP}{dt}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7BdP%7D%7Bdt%7D)
rate of change in momentum is Net outside force on the object
now here we will have if net outside force will be zero
then we can say
![F = 0 = \frac{dP}{dt}](https://tex.z-dn.net/?f=F%20%3D%200%20%3D%20%5Cfrac%7BdP%7D%7Bdt%7D)
so from above equation we can say
![dP = 0](https://tex.z-dn.net/?f=dP%20%3D%200)
and hence we have
![P = constant](https://tex.z-dn.net/?f=P%20%3D%20constant)
so the correct answer will be
<em>3.) in the absence of outside forces</em>
Answer:
it probs gos fast then it was it would be easy if u asked us if their was any mass or friton
Explanation:
Answer:
sodium and chlorine have a large difference in electronegativity (the ability of an element to pull on electrons), resulting in a big difference in electron sharing, producing a molecule with a large “dipole moment” or polarity. The polarity means that the components (ions, in this case) are REALLY attracted to each other, and are so attracted that they stick together (in this case, in a crystal lattice). It takes a LOT of energy to get them to loosen this lattice and melt. All that energy = high temperature.
hydrogen and chlorine don’t have such a large difference in electronegativity, therefore
not as much polarity
the parts aren’t as attracted to each other
takes less energy to melt the solid
lower mP.Explanation: