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Describe the cardiac cycle?

The blood enters the heart from the superior and inferior vena cava. It then enters the right atrium. When the atria fill with blood, it's known as atrial systole as they are relaxed. Once the atria have ...

Answered by Eva C. • Biology tutor

1882 Views

A child weighing 50kg is pushed down a 2m long slide (u=0.1), angled at 45 degrees from the horizontal, at 5m/s. At what speed does the child reach the bottom of the slide?

Change in GPE=Change in KE + ResistanceResistance = ForcexDistnaceForce=Friction= R u = masscos45g2 * 0.1Change in KE = 0.5m*(v²-25)Change in GPE = mg2Sin 45Can cance...

Answered by Matthew W. • Further Mathematics tutor

1589 Views

A new sports car accelerates using rockets at 5m/s for 30 seconds from some traffic lights and then decelerate for 45 seconds to a stop.

SUVAT Part (A) Part (B) S=? S=?U=0 U= Calc From A (V)V=? V= 0T=30s t=45sPart A: V=U+atV=0+530V= 150S=ut+at²S=0+530*30S=4500mPart B: S=(U+V)t/2S=7545S=3375mTotal Distance = 337...

Answered by Matthew W. • Maths tutor

2615 Views

Describe and explain how the mammalian respiratory system is adapted for efficient gas exchange.

The mammalian respiratory system is adapted for efficient gas exchange by increasing the rate of diffusion through targeted manipulations of Fick's law. These manipulations are centred around maximising s...

Answered by Ethan W. • Biology tutor

17159 Views

What is the difference between the verbs "ser" and "estar" in Spanish? (Both are "to be")

While both verbs mean "to be", and are used in descriptions, they are both used in different situations. "Ser" is used in the case of adjectives and descriptions that will not change i...

Answered by Sofia d. • Spanish tutor

1556 Views