A) how fast must a meter stick be moving if its length is observed to shrink to 0.6 m? b) with what speed will a clock have to be moving in order to run at a rate that is one-half the rate of a clock at rest?

A)

0.8 c

B)

0.87 c

Explanation:

A)

L₀ = Original length of the meter stick = 1 m

L = Length observed = 0.6 m

= speed of the meter stick

Using the equation

= 0.8 c

B)

T₀ = Time of the clock at rest = t

T = Time of the clock at motion = (0.5) t

= speed of the clock

Using the equation

v = 0.87 c

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.