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Algebra e.g. 2x + 14 = 18. what is x?

2x + 14 = 18Whatever you do on one side, e.g. LHS, you do the same on the RHS.-14 from both sides 2x + 14 (-14) = 18 (-14)2x = 4To get x by itself you need to divide it by 2. so you divide LHS and RHS by ...

Answered by Sonam T. • Maths tutor

3650 Views

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 ...

Answered by Saram A. • Physics tutor

11333 Views

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...

Answered by Xanthe R. • History tutor

8226 Views

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 fríoT...

Answered by Sarah E. • Spanish tutor

643 Views

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 thisV = 1000 cm³n <-- can be calculate...

Answered by Natalie B. • Chemistry tutor

2086 Views