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What is the significance of performing mouth-to-mouth breaths during CPR?

Exhaled air contains a higher percentage of CO2 than inhaled air, due to it being a waste product of respiration. By breathing excess CO2 into the patient, the blood acidity will decrease and will be detecte...
PD
Answered by Phoebe D. • Biology tutor
3520 Views

'The lives of the Russian peasants were transformed in the years 1928 to 1964.' Assess the validity of this view

The years 1928-1964 were a time in which Russia as a nation, faced a total transformation. From changes in economic and political structure, to a complete shift in social order, most aspects of an average ci...
JB
Answered by Jasmine B. • History tutor
4998 Views

What is the difference between 'ser' and 'estar'?

Both ser and estar mean 'to be', but they are used in different contexts. Ser is generally used for permanent states, including nationalities, genders and professions. It can also be used for physical featur...
FL
Answered by Florine L. • Spanish tutor
2078 Views

Describe your best friend

Il mio migliore amico si chiama Pietro. E' un ragazzo moro e alto. Ha gli occhi verdi e piccoli. Gli piace molto il calcio, tifa la Roma e non si perde mai una partita della sua squadra del cuore. Gli piace ...
MC
Answered by Matteo C. • Italian tutor
4642 Views

Express 4sin(x)+6cos(x) in terms of Rsin(x+a) where R and a are constants to be determined (a should be given in rad).

R=sqrt(42)=6.48...a=arcos(4/sqrt(42))=0.905...Rsin(x+a)=6.48sin(x+0.905)
BU
Answered by Benjamin U. • Maths tutor
4685 Views