The drill used by most dentists today is powered by a smallair-turbine that can operate at angular speeds of 350000{\rm rpm}. These drills, along with ultrasonic dental drills, are the fastest turbines in the world-far exceeding the angularspeeds of jet engines. Suppose a drill starts at rest and comes upto operating speed in 1.9 s.
Find the angular acceleration produced by thedrill, assuming it to be constant.
α=
How many revolutions does the drill bit makeas it comes up to speed?
\Delta \theta=

α = 3070rev/s^2

θ = 5541.66 revolutions

Explanation:

Given;

Operating angular speed w = 350000 rpm

time t = 1.9s

Angular acceleration = change in angular speed/time

Angular acceleration=350000rpm×1/60 min/sec ÷ 1.9s

Angular acceleration α = 3070rev/s^2

Number of revolutions θ = 1/2 × α × t^2

Since initial angular speed is zero

Substituting the values;

θ = 1/2 × 3070 × 1.9^2

θ = 5541.66 revolutions

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

both the fifth and fourteenth amendments of the united states contain a due process clause. while the fifth amendment describes a legal obligation of the federal government to not deprived of life, liberty or property without due process of law, the fourteenth amendment applies the same obligation to the states to guarantee that all of the states provide fair procedures as well.