What are electromagnetic waves? what are its characteristics? how do we classify them?

Greg dropped a coin from the h meter tall building. If it takes t seconds to reach the ground, determine the position of the coin at the t/2 seconds

A spring-loaded pellet gun is designed to fi re 3.00-g projectiles horizontally at a speed of 45.0 m/s. (a) If the spring is compressed to its maximum design difference of 8.00 cm, what spring constant is required?

Find the difference in the pressure between the Dead Sea (400m below) and Amman (1000m above) the sea level. The density of the air = 1.29 kg/m3

Two stars of mass m and M, separated by a distance d, revolve in circular orbits about their center of mass. Show that each star has the same period and find it.

Which planet is associated with the great dark spot?

What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.5 mm and an eyepiece whose focal length is 2.9 cmcm? Follow the sign conventions.

Who was the first person to observe a sign of molecular motion?

sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed of 1.90 m/s. The coefficient of kinetic friction between sled and ice is 0.110. Use energy considerations to find the distance the sled moves before it stops.

Which of the following represents a heterygous genotype? A-YY B-yy C-Y^H Y^H D-Yy

How many photons are absorbed during the dental x-ray?