What is the saying for natural selection?

When a 2.60-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.86 cm. (a) What is the force constant of the spring? N/m (b) If the 2.60-kg object is removed, how far will the spring stretch if a 1.

What type of force can be thought as either a push or pull?

A car travels around a racetrack at aconstant speed. During what parts of the coursedoes the car experience acceleration?

A cup of hot water cannot melt a large block of ice. However, the same block melts when dropped into a lake. This is because

what must be the distance between source of sound and mountain to give an echo in 5 seconds?, (speed of sound at 0°c=33m/sec

Taking the direction west to be positive, and east to be negative, what is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 seconds? A. 2.5 m/s2 B. 0.4 m/s2 C. - 0.4 m/s2 D. - 2.5 m/s2

One consequence of turbulence is mixing. Different layers of fluid flow cross over one another very easily, and get blended together.

If you were going to describe the relationship between current, voltage, and power, you could say:? A "If there is a decrease in power, there must have been an increase in either current or voltage.

Green light shines through a 130-mm-diameter hole and is observed on a screen. if the hole diameter is increased by 20%, does the circular spot of light on the screen decrease in diameter, increase in diameter, or stay the same?

Which forces do not require contact between objects in order to exert a push or pull? select all that apply gravitational force between the earth and an object tension force between an object and a rope magnetic force between two magnets frictional