Answer:
v = 8 [m/s]
Explanation:
Debemos determinar la velocidad promedio, esta velocidad se define como la relacion entre la distancia recorrida sobre un determinado tiempo.
De esta manera tenemos la siguiente expresion:
v = x/t
donde:
v = velocidad [m/s]
x = distancia = 400 [m]
t = tiempo = 50 [s]
v = 400/50
v = 8 [m/s]
We have to speed up the watch so we need to decrease time period of pendulum. So we hv to reduce the length.
Answer:
True.
Explanation:
Adding a non - volatile solute to solvent, decreases the tendency for water molecules to evaporate into gas phase i.e these non - volatile solute particles obstruct or reduce the rate of evaporation. Few water molecules in the vapour.
Therefore, Adding a nonvolatile solute to a solution decreases the vapor pressure of the solution while
Vapor pressure is a measurement of the likelihood of the molecules of a pure solvent to change from the liquid to the vapor phase.
Using Raoult's Law:
Psol = Xsolv * P°solv
where:
Psol = the vapor pressure of the solvent above the solution,
Xsolv = the mole fraction of the solvent in the solution, and
P°solv = the vapor pressure of the pure solvent.
Answer:
there's a link to answer
Explanation:
there's a link to answer in another's persons response it helps a lot just click on it
Answer:
Force between two charges is given as 143.3 N
Explanation:
As we know that electrostatic force between two point charges is given as
![F = \frac{kq_1q_2}{r^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7Bkq_1q_2%7D%7Br%5E2%7D)
here we know that
![q_1 = -5.3 \mu C](https://tex.z-dn.net/?f=q_1%20%3D%20-5.3%20%5Cmu%20C)
![q_2 = 5.3 \mu C](https://tex.z-dn.net/?f=q_2%20%3D%205.3%20%5Cmu%20C)
also we know that
![r = 4.2 cm](https://tex.z-dn.net/?f=r%20%3D%204.2%20cm)
so we have
![F = \frac{(9\times 10^9)(5.3 \times 10^{-6})(5.3\times 10^{-6})}{0.042^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B%289%5Ctimes%2010%5E9%29%285.3%20%5Ctimes%2010%5E%7B-6%7D%29%285.3%5Ctimes%2010%5E%7B-6%7D%29%7D%7B0.042%5E2%7D)
so we have
![F = 143.3 N](https://tex.z-dn.net/?f=F%20%3D%20143.3%20N)