A girl pulls a sled with a force of 40 N. The weight of her sled is 80 N. A boy pulls a different sled with a force of 39 N. The weight of his sled is 70 N. Which sled exerts the force of greater magnitude on the child dragging it? A. The girls sled exerts the force of greater magnitude.
B. The boys sled exerts the force of greater magnitude.
C. The forces exerted by the sled are of equal magnitude
D. not enough information has been provided to answer the question.

For this car, predict the shape of a graph that shows distance (x) versus time (t). note that time is the independent variable and will be on the bottom axis. need asap

Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?