8a. The mass of a girl is 40 kg. Calculate her weight. (g = 9.8 m/s)

b. The weight of a stone is 98 N. Calculate its mass. (g = 9.8 m/s)

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 sort of waves exhibit the doppler effect?

Did anyone do 1.06 lab: cloud formation i need with it i go to k12 lavcame i need to get it done quick