Aparticle moves along the x axis from the origin. the magnitude of the position vector at time t is
f=32t^2-65t^4
1.) calculate the average velocity in time internal 6 secs to 12 secs
2.) determine the istanteneous velocity

frequency or wavelenth of em radiation in a vacuum

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.

the doppler effect is used by weather forecasters to measure 

moving clouds