Mechanics | Relativity Answers

a laser fires at frequency of 40 hertz.. Using c=3x10 to the 8 meters per second,how far apart is each pules?

Determine the resultant of two vectors each of magnitudes 10m if the angle between them is 120 degree

Sound travels 4x faster in water than air, WHY ?

You are told that an object has zero acceleration. Which of the following is true: the object is at rest, the object is moving with constant velocity?

An ant craws on a table top. A position vector R locates the ant at a point with co-ordinates x=35mm and y=45mm relative to the origin of the co-ordinate system. Determine the magnitude and direction of this vector

if the teacher (mass 85kg) was walking instead of running and had a momentum of 350kgm/s while doing so,what was their walking velocity?

Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 23.0 m in a direction 60.0 ^\circ west of north. Jane walks 14.0 m in a direction 30.0 ^\circ south of west. They then stop and turn to face each other.
A: What is the distance between them?
B: In what direction should Ricardo walk to go directly toward Jane?

a picture is supported by two vertical springs; if the weight of the picture is 50N what is the force excerted by each string?

supertank of 1point5x10eight kg has exerting a 75x10three N Force against water drag at 40x10three, calculate tensions in tug cables
acceleration 2x10negative3 m/s

a 1350-kg vehicle moves with a velocity of 19.0 m/s. calculate the power required to reduce the velocity to 4.90 m/s in 20.0 s.