Two identical particles, each of mass 1,410 kg, are drifting in free space along the same path, one directly in front of the other one. At one instant, their separation distance is 18.0 m, and the particles have the same velocity of 850î m/s. What are the velocities (in m/s) of the particles when they are 4.00 m apart? leading particle v = (850 + î m/s trailing particle 850 + Jî m/s

As stated in the pic

Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. If these two vectors are added together, the magnitude of the sum... A) is equal to 2.0 m. B) could be as small as 2.0 m or as large as 12 m. C) is equal to 12 m. D) is equal to 8.6 m

A good-quality measuring tape can be off by 0.58 cm over a distance of 23 m.What is its percent uncertainty?

Adv 02

Problem 1: Convert to Sl and write in scientific notation: a) 55 mph (miles per hour) to m/s b) 6.0 gallons to liters c) 1.282 light-seconds to m d) 1 acre to m²

answer in kA....

As stated in the pic

The answer is 28. How do you get it.

C, D, and E in pic.