Recent content by Stroodle

Hi there, I have a question that I'm not sure to go about solving: A car of mass 700kg is towing a trailer of mass 500kg, on an incline of 30 degrees to the horizontal. Friction on the trailer is 400N, friction on the car is 600N. If the engine provides a driving force of 700N, what is the...

Hi there, For this question, I've been asked to calculate the maximum energy a spring can store when compressed by 8cm. I've already found the spring constant to be 5.0\times 10^5\ Nm^{-1} (which is correct), so I thought it was just a simple matter of pluggung the values into the formula...

(2)^2=4 and (-2)^2=(-2)(-2)=4 \therefore if x^2=4, x can be \pm 2

Nope. Unfortunately i don't :(

Hi, I'd just like to know why fertiliser producers refer to "the percentage by mass of sulfur present as sulfate" in their fertilisers? Thanks!

Hi, I'd just like to know why fertiliser producers refer to "the percentage by mass of sulfur present as sulfate" in their fertilisers? Thanks!

Hi there. I'm just wanting to know the most important reason why barium chloride is chosen over lead chloride as the precipitation agent when trying to determine, by gravimetric analysis, how much sulfate is in a sample. I think it's probably due to BaCl2 having a higher solubility, but...

Thanks for that Inutard. I really appreciate your help.

anyone?

Homework Statement Hi there, I'm doing a practical investigation to see how the centripetal force required for circular motion varies with the frequency of rotation, and I was just wondering which is the independent variable, and which is the dependent one. The investigation involves...

Ahh. Awesome. Thanks for your help!

What's the minimum number of objects required for a force to be present? I assume it's 2, because you'd need one object to be moved and the other to apply the force. Is this correct? Thanks

Awesome. I've got it now. Thanks for your help.

z=x+yi determine the values of x and y such that z=\sqrt{3+4i} I'm not even sure where to start with this one, so any help would be greatly appreciated

A girl at the bottom of a 100\ m high cliff throws a tennis ball vertically upwards. A boy at the very top of the cliff drops a golf ball so that it hits the tennis ball while both balls are still in the air. The acceleration of both balls can be assumed to be 10ms^{-2} downwards. With what...