A DNA molecule is made up of a sugar backbone and four flavors of a molecule called al
These
nucleotides are arranged along the backbone in a unique
order. Moving up a level of organization, we have
Lare passed on from parents to
children in the form of genes. The next level up is the
chromosome. Humans have Lof these, arranged in
pairs. Chromosomes contain many!
along
with long stretches of DNA
tes

What formula  this one  (x_/

If the heat engine is a perfect carnot cycle engine, thenefficiency = (t2-t1)/t2   where t1=temperature of cold reservoir ( ° k) = 135            t2=temperature of hot reservoir ( ° k)   = 325thereforeefficiency = (t2-t1)/t2 = (325-135)/325 = 0.5846 = 58%  note: this is the theoretical maximum efficiency of a perfect heat engine.   real-life engines do not achieve this value.

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.