Una caja de madera se desliza a velocidad constante sobre una mesa de trabajo; si la caja tiene una masa de 15Kg. y el coeficiente de fricción es de 0.2. Determina el valor de la fuerza que se le aplica a la caja de madera.

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?

What is the increase in density of a medium due to wave travel?

Bonds within one water molecule are examples of