Calculate the pressure exerted by a girl on the ground if her mass is 50 kg and the area of her shoes in contact with the ground is (a) 150 cm2 (high heels); (b) 400 cm2 (flat
soles). (Take gravitational field strength g= 10 N kg)

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 determines the amount of inertia an object has

In a good thermo flask the main cause of heat loss is