If the same net force is applied to a 7 kg object and a 21 kg object, then the 21 kg object accelerates three times faster than the 7 kg object. the 7 kg object accelerates three times faster than the 21 kg object. both objects accelerate at the same rate because the force is the same neither object will accelerate because there is a net force on the objects. what is the acceleration due to gravity on mars?

Ascientific blank must be testable and capable of being proven false?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)