02/15/24

Unsure how to set this up because of the E

A supertanker (mass = 1.60E+8 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.54E+5 N. Determine the magnitude of the resistive force exerted on the tanker by the... more

02/14/24

Does a solid, like a night stand, vibrate macroscopically because the atoms and molecules that make up the solid vibrate?

We know particles that make up solids vibrate, but do the solids vibrate themselves because of that? Like a structure or object like a night stand, does that night stand vibrate macroscopically... more

Does an athlete's proficiency at luge depend on his mass?

I was watching the men's [luge](http://en.wikipedia.org/wiki/Luge) ride with my dad. My dad said, the mass of the athlete must be at an optimum level so that he wins. I said, his volume should be... more

Relativistic equivalent of a spring-force?

Usually what helps me understand a concept better in physics is to write a simulation of it. I've got to the point where I'm competent in the basics of special relativity, but, I can't figure out... more

Physics behind the flow of gas coming out of a balloon?

I'm working with stratospheric balloons (latex ones) and I want to put a valve on it so it can float for a longer time. I'm trying to define which valve I should use, which demands I estimate the... more

difference between dot product and inner product?

I was wondering if a dot product is technically a term used when discussing the product of $2$ vectors is equal to $0$. And would anyone agree that an inner product is a term used when discussing... more

Does juggling balls reduce the total weight of the juggler and balls?

A friend offered me a brain teaser to which the solution involves a $195$ pound man juggling two $3$-pound balls to traverse a bridge having a maximum capacity of only $200$ pounds. He explained... more

03/27/19

Can you jump higher if you run? If so, why? (High jumping)?

I have often wondered why high jumpers can jump higher if you run. The way I see it is that you only build up horizontal speed, and since you're running on a plane, I cannot see how this speed can... more

Why does Coriolis determine the rotation direction of a cyclone but not my drain?

It is a common misconception that Coriolis is responsible for the direction the water swirls down a toilet, tub or sink drain. E.g. does a toilet flush the other way in the southern hemisphere? (If... more

Geometrical Interpretation of Cauchy Riemann equations?

Differentiation has an obvious geometric interpretation, and the Cauchy Riemann equations are closely linked with differentiation. Do the Cauchy Riemann equations have a geometric interpretation?

What is vector division?

My question is: We have addition, subtraction and muliplication of vectors. Why cannot we define vector division? What is division of vectors?

03/22/19

What does it mean when my friend comes up to me and says "Na"?

I think it means something like "Hello" or "How are you?", am I right?

03/15/19

Gravitational force when standing on an infinite disc?

If a person were to stand on a flat disc of thickness 1 meter but infinite diameter, would they experience finite or infinite downward force? There is an infinite amount of mass, all of which... more

How do you graph f(x) = ||x|-3|+4?

differential equations

Hi, can somebody help me to solve these differential equations.   1. Da*(ex+sqrt(a))/sinx   2. D[e2xcos(3x)]   3. D*1/sqrt(1+x2)   4. m(t)= In (t/t0)2   5. du(t)/dt, when u(t)= u... more

02/10/16

define universal gravitational constant?

physics  

01/25/16

what is the slope intercept form (-1,6),(7,-10)

slope intercept form

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