How much energy must be added to a 1 kg piece of glass with a specific heat of 644 J/kgC to increase its temperature from 20 c to 100c

Aparticle initially moving east with a speed of 20.0 m/s, experiences an acceleration of 3.95 m/s, north for a time of 8.00 s. what was the speed of the particle after this acceleration, in units of m/s? give the answer as a positive number.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Could we see a galaxy that is 20 billion light-years away?