Avertical spring with spring constant 205 n/m vibrates with an amplitude of 28 cm when 0.26 kg mass hangs from it. the mass passes through the equilibrium point (y = 0) with positive velocity at t = 0. at what times will the spring have its maximum and minimum extensions?

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?