In an ecosystem, why can only one species fill an ecological niche?

A wave is approaching a barrier that has a small hole at the center. Which describes the change in the wave as it encounters the barrier? A. The wave will slow down B. The wave will bend or defract C.

What is a suitable material for radioactive shielding

Why is sun at horison small

Suppose you know only the position of an object at instants A and B. Is more than one displacement possible? Is more than one average velocity possible? Is more than one average speed possible?

The capacitance of a parallel-plate capacitor does not depend on: area of the plates medium between the plates distance between the plates the material of which the plates are made

A ladder placed up against a wall is sliding down. The distance between the top of the ladder and the foot of the wall is decreasing at a rate of 9 inches per second.

What number is neutrons protons electrons of helium

A pendulum is swinging back and forth with a period of 2.0 seconds here on Earth. This pendulum is then brought to the Moon. What will happen to the period of the pendulum, assuming everything else about it remains exactly the same? Explain.

A car drives 125 meters in 5 seconds. calculate the cars speed

A car speeds up as it rolls down a hill. Which is this an example of? A. positive acceleration B. negative acceleration C. relative velocity