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Johnny take 4 hours 50 minutes to drive 213 miles to Manchester. He then takes the train to Liverpool. Liverpool is 37 miles from Manchester and the train travels at 90mph. Calculate Johnny's average speed for his total journey in mph.

Total journey average speed = (total distance travelled ÷ total time taken).Total distance travelled = 213 miles + 37 miles = 250 milesTotal time taken (hours) = 4 + (50÷...

Answered by Steven W. • Maths tutor

2940 Views

What is the difference between the imperfect and the perfect tense?

The perfect tense, or "passé composé" is used to demonstrate an action that is in the past and has been completed, for example "Yesterday, I went to the shop", "Hier,

Answered by Phoebe T. • French tutor

1777 Views

What is the derivative of y = (3x-2)^1/2 ?

Use the chain rule, u = 3x-2dy/dx = dy/du du/dxdy/du = d(u^1/2)/du = 1/2 u ^-1/2power down and minus 1du/dx = 3constants =0so, dy/dx = 3 1/2 (3x-2)^-1/2= 3/2 (3x-2)^-1/2

Answered by Chloe J. • Maths tutor

8970 Views

Explain: 1. Why butanoic acid has a higher boiling point than butan1-ol? 2. Why carboxylic acids of short chain length are more soluble in water than those with longer carbon chain length?

1.Butanoic acid has stronger intermolecular forces (hydrogen bonding) because it has two highly electronegative oxygen atoms in its structure, whereas butan-1-ol has only one. Therefore t...

Answered by Samuel L. • Chemistry tutor

21833 Views

Outline and explain the psychodynamic approach in psychology

The psychodynamic approach looks at the unconscious basis of behaviour. According to Freud, the personality is split into 3 parts: the ID satisfies selfish needs; the superego satisfies moral needs and th...

Answered by Daisy R. • Psychology tutor

22992 Views