In the modern model of the atom nucleus is surrounded by a negatively charged

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

Whithin which type of system is neither the total mass nor the total energy conserved ? a. open b. connected c. isolated d. closed