Which particle rarely interacts with matter?

a. proton

b. photon

c. positron

d. neutrino

When two or more pure substances are blended together the result is a?

Find the wavelength of a 26 Hz sound wave traveling through air at 20ºC. Hint: speed of sound at 20ºC = 343 m/s

What happens when a vector is multiplied by a scalar? a) It gets rotated in the plane b) It gets longer c) It turns into a scalar d) It gets either longer or shorter, but does not change direction

Which of these is an example of a mechanical wave? Ocean waves Microwaves used to heat food X-ray Light from a flashlight

You have an appliance that requires 1.0 amps and runs off a standard ac (120 v outlet. if you run the device for 2 hours a day for every day in a year, and electricity costs 11.

Projectile motion is an example of what kind of motion

What can change scientific knowledge?

6. What is ductility?

During practice, a baseball player hits a very high fly ball, and then runs in a straight line and catches it. Which had the greatest displacement during the time period from the hitting of the ball to its catching

Why are glass fibers stronger than bulk glass?