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Ultrasound is used to scan unborn babies but X-rays are not used to scan unborn babies.

Ultrasound is not ionising as it is a longitudinal wave whilst X-rays are ionising as they are transverse waves and have very high frequency hence can 'knock' electrons out of their orbit. Doing this can cau...
SA
Answered by Saram A. • Physics tutor
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To what extent was Lenin a 'Red Tsar'?

The way in which government was structured and organised under Lenin is indicative of more continuity than change, suggesting that he was in fact a 'Red Tsar'. When Lenin came to power in October 1917, he of...
XR
Answered by Xanthe R. • History tutor
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Can you give me 3 examples of when the subjunctive must be used in Spanish

The subjunctive is used for a change of subject in a sentence eg. Quiero que tu no tengas frío The subjunctive is used with the conjunction 'para que'eg. Debes llevar una chaqueta para que no tengas fríoThe ...
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Answered by Sarah E. • Spanish tutor
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A 1000 cm3 container of ammonia (NH3) has a mass of 20.7g, it is stored at room temperature (298 K). When empty the container has a mass of 20.0 g, calculate the pressure inside the container in kPa to an appropriate number of significant figures.

Using PV = nRT, make a note of the information you have, what you can calculate and what you need to find. P <-- need to find this V = 1000 cm 3 n <-- can be calculated from mass = mr X mol since we kn...
NB
Answered by Natalie B. • Chemistry tutor
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‘King Lear is a play which brings us closer to the apocalypse than to resolution’ Discuss

(I think essay plans are the most effective)First consider if you agree with the statement.Apocalypse is shown through the collapse of justice. This is exemplified through King Lear's actions (love test etc)...
ZM
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