The human immune system fights infection by releasing

1. ATPs

2. Antibiotics

3. Antibodies

4. Antigens

How does the speed of a sound wave change as the medium through which it traveks changes?

Which field of psychology intertwines with law enforcement and criminology? A). educational psychology B). forensic psychology C.) industrial psychology D). developmental psychology

What is the speed of sound for a noise that travels 2km in 5.8s?

Which statement best describes the relative conductivity of semiconductors? a. They are the most conductive elements. b. They are the least conductive elements. c. They are more conductive than metals but less conductive than nonmetals. d.

According to the collision theory, all collisions do not lead to reaction. Which choice gives both reasons why not all collisions between reactant molecules lead to reaction? 1.

The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor.

Stress is a factor that contributes to heart disease risk. true or false

What is the difference between cementation and compaction?

Is it possible for a baseball to have as large a momentum as a much more massive bowling ball

A simple pendulum with length 1.6 m and mass 21 kg is pulled 20◦ from the vertical and released. If it is allowed to swing until it comes to rest, how much energy was converted into heat? The acceleration of gravity is 9.8 m/s 2.