Tesfahun melaku

A 30 kg child on swing 2m long is released from rest when the swing supports make an angle of 37 with the vertical a) neglecting friction, find the child's speed at lowest position b) if the speed of the lowest position is 2.2m/s, what is the energy loss...

A marble rolls is height h along a frictionless curved surface as shown in figure below. The projected as it reaches a height of h/4 and lands at point B. determine the maximum height reached.

A nozzle with diameter of 0.500cm is attached to a garden hose with radius of 0.900cm. the flow rate through hose and nozzle is 0.500L/s. Calculate the speed of the water a) in the hose and b) in the nozzle

A container filled with water and there are holes, as shown in the figure below. what is the ratio of x1 to x2?

You 25kj of work on a system consisting of 3.0kg of water by stirring it with a paddle wheel. During this time, 15kcal of heat is released by the system due to poor thermal insulation. What is the change in the internal energy of the system?

During thermodynamics process, a system moves from state A to state B, it is supplied with 400J of heat and does 100J of work. a) For this transition, what is the system's change in internal energy? b) If the system then moves from state B back to state A...

A 100cm long container filled with water and there is two holes, one is at 20cm from the top and the other is at 50cm from the bottom. what is the ratio of X1 to X2 ?, where X1 is distance between the drop of the first hole and the container and X2 is the...

A layer of oil with density 800Kg/m^3 floats on top of water with density 1000Kg/m^3. A block floats at the oil-water interface with 1/4 of its volume in oil and 3/4 of its volume in water. what is the density of the block?