Rick R.

04/26/19

What would happen if $F=m\\dot{a}$?

What would happen if instead of $F=m*d^2x/dt^2$, we had $F=m*d^3x/dt^3$ or higher? Intuitively, I have always seen a justification for $\\sim 1/r^2$ forces as the "forces being divided equally... more

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Trigonometry

04/23/19

How can you prove that y=x*sin(x) and y=cos(x) intersect at right angles?

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Accounting Financial Accounting Investing

04/23/19

Why Present Value and not Future Value?

This is a question in an online finance lesson, and I know what they want for the answer. But I'm not at all a novice at financial matters, so in my mind, I would do this differently. The question... more

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Physics

04/13/19

Why can't we ascribe a (possibly velocity dependent) potential to a dissipative force?

Sorry if this is a silly question but I cant get my head around it.

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Physics

04/09/19

a bear tries to push a tree with 900N of force, but the tree doesn't move. How much force did the tree exert in the opposite direction the bear was pushing?

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Algebra 1

03/19/19

The value of diamond is directly proportional to the square of its weight. A diamond breaks into 3 pieces with weight in ratio 3:4:5, thus a person loses 9400 $ . What is the actual value of diamond?

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Physics

03/16/19

Particles for all forces: how do they know where to go, and what to avoid?

Here's an intuitive problem which I can't get around, can someone please explain it? Consider a proton P and an electron E moving through the electromagnetic field (or other particles for other... more

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Geometry

02/24/18

The sum of the lengths of any two sides of a triangle

The sum of the lengths of any two sides of a triangle must be greater than the third side. If a triangle has one side that is 8 inches and a second side that is 4 inches less than twice the third... more

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Alegebra Homework

09/21/15