When should students practice netiquette in an online course? Check all that apply.
when sending texts to friends
when sending e-mails to classmates
when collaborating in library study groups
when participating in online discussion boards
when collaborating as part of a digital team

ek = (m·v2) / 2

v - velocity of system after the collision

m = m1 + m2

ek = (m1 + m2) ·v2/2

ek = (200 + 250) ·2,32/2 = 450·5,29/2 = 1190,25 j

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answer is d. graphite coatings.

some connecting rods have _graphite coatings_ to lubricate the cylinder wall or piston pin.