Which is the goal of science?

A. to develop new technology

B. to test hypotheses

C. to expand knowledge

D. to apply information

This is the reduction in the density of a medium

Which is a major threat to biodiversity? A. Red-billed oxpeckers eat ticks off of impalas' coats in the grasslands of East Africa. B. Mining in the Guinean Forests of West Africa to provide diamond and gold jewelry for humans. C.

A pair of narrow parallel slits are separated by a distance of 0.250 mm and illuminated by a green light with wavelength 5.461 x 10-4mm.

What is speed and what is velocity?

A baseball bat contacts a 0.145-kg baseball for 1.3*10-3 s The average force exerted by the bat on the ball is 8900 N.

Can a body be in equilibrium if only one external force act on its? explain

When sugar is poured from the box into the sugar bowl, the rubbing of sugar grains creates a static electric charge that repels the grains, and causes sugar to go flying out in all directions. If each of two sugar grains acquires a charge of 1.

You rub a clear plastic pen with wool, and observe that a strip of invisible tape is attacted to the pen. Assuming that the pen has a negative charge, which of the following could be true? Select all that apply.: A.

Magnet a has twice the magnetic field strength of magnet b and at a certain distance pulls on magnet b with a force of 100 n. the amount of force that magnet a exerts on magnet b is

A heavy sled and a light sled, both moving horizontally with the same speed, suddenly slide onto a rough patch of snow and eventually come to a stop.