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Deduce the expression for the electric field E due to a system of two charges q1 and q2 with position vectors r1 and r2 at a point r with respect to common origin.
How to find the ground state for electron that is in harmonic potential when the potential is given. I know that you use schödingers equation and wave function, but thats all. Otherwise cant solve it!
I understand the concept of electricity well but I'm not able to understand what is exactly going on inside a magnet. I don't understand what creates the magnetic effect of a magnet. How can electricity be generated from magnet and magnet be generated from electricity? What is really going on in terms of atoms and charges and everything?
Carol eats a regular hamburger and drinks a glass of cow's milk for breakfast. Suppose that energy content of the hamburger and the milk are 2115 kJ and 565kJ respectively. What % of energy from the food does Carol use to push a sack of rice along a horizontal distance of 4.75 m? Her hands exerted a force of 50N applied 20° down with the horizontal.
Without using your spring scale, estimate the order of magnitude of the mass of your calculator in grams from what you judge to be its size, using the fact that the density of water is 1 g/cm3. Assume that the density of water is about the same as the density of your calculator. 1 g 102 g 104 g 106 g
Falling objects drop with an average acceleration of 9.8m/sec/sec. If an object falls from a tall building, how long will it take before it reaches a speed of 7m/s?
A roller coaster car with a mass of 250kg starts from a height of 100m above the ground just before rolling down the frictionless track. Find the speed of the car as it reaches the ground
A 100N girl rides a 50N bicycle a total of 150m at a constant speed. The frictional force against the forward motion of the bicycle equals 25N. How much work does the girl do? Explain your answer.
An object of mass 20kg is falling in air and experiences a force due to air resistance of 40N. Determine the net force acting on the object and calculate the acceleration of the object.