Answer to group of organisms that share similar characteristics and can reproduce among themselves producing fertile offspring

Simple planetary gearsets are being discussed. Technician A says any one of the three members can be used as the driving or input member. Technician B says the ring gear is always the driving or output member. Who is correct?

What is the period of Earth spinning on its axis? what is its frequency?

If an object increases speed from 4 meters per second to 10 meters per second in 3 seconds, what is the acceleration of that object

Which of the following is the best definition of gravity?

A gremlin is a tiny mythical creature often blamed for mechanical failures. Suppose for a moment that a shrewd physicist catches one such gremlin and makes it work for her instead of against her.

A small 25 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?

A car traveling on a flat (unbanked), circular track accelerates uniformly from rest with a tangential acceleration of 1.85 m/s2. The car makes it one quarter of the way around the circle before it skids off the track.

A train travels 120 km in 2 hours and 30 minutes what is the average speed

How many constellations are there?

What units are given to the right of the equals sign