what percent of the 80 kcal of heat q needed to change one kilogram of ice at 0°c to water at 0 °c is involved in doing work w? is w positive or negative? the density of ice and water are 917 kg m-3 and 1000 kg m", respectively.

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?