Recent content by Shehbaj singh

Everything in universe radiates heat except those with temperature of 0kelvin.

I know about general conduction but I am talking of process of transfer of heat from metal to air. How it happens at molecular level or it's just not conduction and is radiation.

Okay I am taking about rate of flow of heat. And it's in time limit like we put chairs from indoor to outside for five minutes. That's what I talking about why metal gets cold faster with only contact with air.

A typical example is a iron chair gets cold in winters and wooden chain not. We all know iron is more conductive but how this thing possible at molecular level of conduction of heat from metal to air. In general conduction I know it is possible due to vibration transfer of molecules but how it's...

A simple way is that x should be such that product is negative or zero. hence x should be such that only one of two multiples is negative. If number is greater than 7 product will surely be positive and less than -1 both will be negative. I always tell try to understand logically the equations...

Check Bernoulli s theorem. Decreasing pressure is wrongly said. You must have known about work-energy principle. Pressure of liquid do work to increase kinetic energy of itself and pressure gets decreased. Check google it's all explained with diagram.

Though there are many ways like integration but an easy way without mathematical calculations is the intersection of axis of symmetry. A simple way applicable for regular bodies of uniform density. If the things in body is to me concluded then take centre of mass of centre of mass of boat and...

I think I got a better definition. Complex numbers is the universal set of all the values in mathematics. Because if coefficient of I is zero, we get real numbers and rational numbers is a subset of real numbers and natural numbers is subset of it and so on.

Hello, You need to understand money is just trust of ours with government. Economy works on the principle of demand and supply. If demand for dollars is constant but supply is increased by printing more money, they subsequently lose their value. Now suppose value of pair of shoes is constant, if...

It will tell you exact intervals. Now if intervals of θ are not joining, there may be two intervals where in between is gap, it will also tell about it. Though, it's some long you can never forget it and it's applicable to many equations. And every solution from it is required and there are no...

sorry i thought it was position-time graph. Still I think what I said about the locus, I was right.

Hello, you see in this case weight mg have two componets along the plane and prependicular to plane. component along the plane tries to bring weight down the slide and the other component pushes the plane. As this component push plane, plane would also push it with same force unless plain would...

No i don't think that the locus you are telling would have single figure which has specific equation, but it would be mixture of two locus which we already know, parabola and straight line. a single equation is not possible. I can explain the reason that generally in a locus which as by you in...

There's much more easier way which is easy to apply and known by many. -4<3cosQ + 4sinQ<2 take anyone of inequality and have anyone cos or sin to other side and square. when you change one function sin²θ + cos²θ = 1 then you get a quadratic equation. Solve for it you will get intervals...

Hello, 1/cos(pi/4) is not equal to cos(-pi/4). Cos(-pi/4) is equal to cos(pi/4). It is because cos function is an even function and it produces same answer to negative and positive values. I can give you a simple reason that 0 and 2pi is same in angles and 0-pi/4 is same as 2pi-pi/4 if you see...