Aspace probe with a rest mass of 8.1×10^7 kg and a speed of 0.49c smashes into an asteroid at rest and becomes embedded within it. if the speed of the probe-asteroid system is 0.26c after the collision, what is the rest mass of the asteroid? answer in 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?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

The amount of potential energy possessed by an elevated object is equal to what?