Recent content by hacker804

The only force is the frictional force F=-uk*mg

Actually I do not remember properly but I think the length of the block was L.

Homework Statement The following problem appeared in our test: A box of mass m is moving with a constant velocity v along a smooth frictionless surface.When the box passes the boundary the frictional force acts on the box.The coefficient of kinetic friction between the box and the surface is μk...

I have been asked to right an essay on how chemical engineering and chemical processes have played a role in the evolution of display devices and upto the new 4K TV.I searched for some ideas but could not find any specific materials.Can anyone provide some ideas?

I have never took notes in my life.I just listen to the lecture and read the material from the book but I have never jotted down anything during the lecture.Considering that I recently started university, is note taking really important or can I just study without it?

Hi. I want to ask a question that does the electric flux passing through a hollow surface depends on the nature of the surface?That is does it depend on the relative permittivity of the surface εr?? Please clear my confusion thanks .

Thanks for the help.

So it is 6m to the left from q1 which means it is not on the line between the two charges which is only 3m.

So its potential energy decreases?

If an electron is placed in a uniform electric field it moves from a lower potential to a higher potential.So does it's potential energy decrease.In other words,is PE_{f}-PE_{i}<0? This is confusing me.

Homework Statement Two charges of q1=4μC and q2=-1μC are separted by a distance of 3 m.Find and justify the zero field location. Homework Equations E=\frac{kQ}{r^{2}} The Attempt at a Solution Consider a point x to the right of charge q1 where the field is zero.The distance of x...

Yup.its actually 240W.i have an older edition of the textbook and its corrected in the newer edition.my teacher checked and told me.

No.its 240W.i asked my teacher and he said there was a typo in the question.

Homework Statement A motor,rated 100W,runs from a source voltage 120V.If 2A of current flows through it then calculate the mass of water pumped by it to a height of 10m in 5 seconds. Homework Equations P=IV P=E/t E=mgh The Attempt at a Solution P=IV P=mgh/t mgh/t=IV m=IVt/gh...

Need to ask a question. Weightlessness occurs when the net force acting on a body is zero.For example,consider a person in orbit.The centripetal force provided by gravity of the Earth is balanced by the outward centrifugal force therefore the net force on the person becomes zero and he becomes...