Name the conditions required for 2 waves to interfere constructively

5. A balloon is ascending at the rate of 4.9m/s. A pocket is dropped from the balloon when situated at a height of 245m. How long does it take the packet to reach the ground? What is its final velocity?

A thermometer measures its own temperature? What does it mean?

Which statement best describes copper? A. It has a low resistance and prevents charges from moving freely. B It has a high resistance and allows charges to move freely. C. It has a high resistance and prevents charges from moving freely. D.

A helium nucleus contains two protons and two neutrons. The mass of the helium nucleus is greater than the combined masses of two protons and two neutrons because binding energy has been added. True False

Due to the doppler effect when moving away from the source of a sound

An example of objects the move in revolution

How many hops does a kangoroo do in 1 day

What are the average velocity and average acceleration of the tip of a 2.4 cm long hour hand of a clock?

What is the number one and most important rule to remember in soccer?

Why are convection currents; why are they hotter and colder parts of earth