A proton initially moves left to right long the x axis at a speed of 9.0 × 10^3 m/s. It moves into an electric field, which points in the negative x direction, and travels a distance of 0.8 m before coming to rest. If the proton's mass and charge are 1.67 × 10^?27 kg and 1.60 × 10^?19 C respectively, what is the magnitude of the electric field?
a. 4.3E+1 N/C
b. 5.3E–2 N/C
c. 5.3E–1 N/C
d. 6.6E–1 N/C
e. 1.1E+0 N/C
c
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In a Newtonian fluid, the plastic shear strain rate is equal to the applied shear stress divided by the _________.
Fill in the blank(s) with the appropriate word(s).
When light goes from one material into another material having a HIGHER index of refraction,
A) its speed, wavelength, and frequency all decrease. B) its speed and wavelength decrease, but its frequency stays the same. C) its speed decreases but its wavelength and frequency both increase. D) its speed decreases but its frequency and wavelength stay the same. E) its speed increases, its wavelength decreases, and its frequency stays the same.
What evidence suggests that small galaxies in our Local Group have undergone two or more starbursts in the past?
A) We observe several small galaxies currently undergoing massive star formation. B) We see small galaxies in which many stars have one age and many others have another age that is billions of years older. C) We see evidence that small galaxies in our Local Group have experienced several collisions in the past. D) We see evidence that several small galaxies were shot out of larger galaxies in our Local Group during an age of starburst activity. E) We do not have any evidence that galaxies in our Local Group were once starburst galaxies.