Recent content by Empirical Wizardry

The advice I'd offer is: (1) List out all the variables, and fill out the values for the variables you know and don't know. Write any equations relating the variables to each other. Specifically focus on writing equations relating unknown variables to known variables. Then... (2) Review your...

(1) Hi Alexandria, good answer for part (b)! Have a look at the water level in the container as well; how is the change in the container compared to the osmometer? Why do you think it's important to keep track of where all the water in the system goes before we say anything further? (2) The...

So we know that Vx, rain = 10 m/s, and θ = 40 degrees. Using the formula: tan(θ) = (vy, rain)/((vx, rain) - (vx, cart)) This equation relates the angle of the rain with respect to the car to the velocity components of the rain relative to the car. We should get 20*tan(40 degrees) = (vy, rain)...

To clarify you want the angle of the rain with the ground at this point right?

I thought only the rain is always moving in the same Vx in same direction (positive) as the cart would give 90o strike, isn't it? (1) Yep you're right, the rain moves with the same velocity as the cart in the 90 degree case. I may have made things more complicated than they need to be. So if...

Ok no problem. Good attempt! You have used 10cos(50) to get the horizontal velocity. This requires that the velocity of the rain vector to be 10 m/s. How did you determine the rain vector to be 10 m/s ? The diagram below shows what you have calculated: We don't know that the magnitude rain...

Hi Chloe, BvU is right, start by drawing a picture. In this picture: Define your ground as a stationary point of reference. The rain will strikes the ground at some angle which we need to solve. We first need to solve for the x and y velocity components of the rain relative to the ground (our...

Mathematics is like reading tea leaves, if you do it just right you might just predict the future. I started to appreciate just how awesome math can be during my 1st year chemistry courses (I completed a degree in Science at UNSW in 2016 majoring in neuroscience). The topic that did it for me...