Restriction enzymes are used in DNA profiling because they cleave DNA molecules at or near a specific sequence of bases that are called restriction sites. <span>Gel electrophoresis is a method of separating DNA and RNA and proteins based on molecular sizes. It works by pushing the molecules with an electric field through a gel that has pores that separates them.</span>
To answer, we determine the velocity of the flea when it leaves the ground. Using the given value for distance, the velocity can be determined through the equation,
2a d = (Vf)² - (Vi)²
where a is the acceleration due to gravity, d is distance, Vf is the final velocity which is equal to zero and Vi is the initial velocity. Substituting the known values,
2(9.8 m/s²)(40cm/100cm) = (Vi)²
The value of Vi from the equation is 2.8 m/s.
The equation for determining the kinetic energy is:
KE = 0.5mv²
Substituting,
KE = 0.5(0.60 x 10^-3g)(1 kg/1000g)(2.8 m/s)²
KE = 2.352 x 10^-6 J
Speed and direction are the two scientific componets that make up velocity.
