A force of 300N is used to stretch a horizontal spring with a 0.5kg block attached to it by 0.25m. the block is released from rest and undergoes harmonic motion. Calculate spring constant mechanical energy applied and velocity when x=15cm?​

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form