what is the function of count unit, control and grating unit, display unit in digital counter diagram​

A15,000 kg rocket traveling at +230 m/s turns on its engines. over a 6.0 s period it burns 1,000 kg of fuel. an observer on the ground measures the velocity of the expelled gases to be −1,200 m/s.

Why is the basic problem of economic,scarcity, a universal problem?

An object moves with an average speed of 3.0 m/s for 2.0 minutes. select the answer that best represents the distance traveled by the object. the distance traveled by the object in that time is closest a.) 6 m b.) 60 m c.) 180 m d.) 360 m