Which cells in the immune system identify pathogens and distinguish one pathogen from another?

T cells

phagocytes

B cells

red blood cells

How do magnetics ruin electronic devices

When two waves undergo complete, constructive interference, which of the following increases? A. speed B. amplitude C. wavelength D. frequency

a particle with a charge of 5.5 x 10^-8 c is 3.5 cm from a particle with a charge of - 2.3 x10^-8 c. the potential energy of this two particle system relative to the potential energy at infinite separation is:

What does Newton's second law explain? A. Why the speed of the ride changes B. Why roller coasters have seat belts C. Why roller coasters do not have brakes D. Why roller coasters start with a big hill

How much time will elapse between seeing and hearing an event?

Order the colors of the rainbow starting with the color that is bent the least to the color that is bent the most (when it passes through a prism). Question 1 options: yellow blue indigo orange green red violet

Find the unit vector that has the same direction as the vector v = _12j

Why isn't the size of something considered a physical property?

A hunter is standing on flat ground between two vertical cliffs that are directly opposite one another. He is closer to one cliff than the other. He fires a gun and, after a while, hears three echoes. The second echo arrives 1.

A car going at 30 m/s undergoes an acceleration of 2 m / (s^2) for 4 seconds. how far did it travel while accelerating?