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A mass of 2kg is dropped from rest at a height of 10m. i) What is the initial GPE of the mass? ii) What is the final velocity of the mass when it hits the ground?

Part iGravitational Potential Energy (GPE) = mass x gravitational acceleration constant x heightGPE = 2 x 9.81 x 10 = 196.2JPart iiConservation of energy states that the sum of the GPE and K...

Answered by Zaakir S. • Physics tutor

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n is an integer greater than 1. Prove algebraically that n^2-2-(n-2)^2 is always an even number

We want to show that this gives an even number, so we need to get it into a form that it is 2 multiplied by some positive integer. We start by expanding the (n-2)²out, remember that (n-2)^...

Answered by Jacob C. • Maths tutor

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Give an advantage of hard water.

Hard water tastes better.

Answered by Angus B. • Chemistry tutor

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Nancy is driving and makes a wrong turn. The satnav indicates that her journey will take an extra 7 minutes. Nancy drives at an average speed of 60km/h to the nearest 5km/h. What's the greatest possible distance traveled in this detour in km to 2.d.p?

Start by selecting useful information in the text.time = 7 minutesspeed = 60km/h to the nearest 5km/hmaximum possible distance travelled = ? kmWe know a time and speed and want to know a distance. So we c...

Answered by Louis G. • Maths tutor

3065 Views

How should I properly inflect a noun in Polish?

Polish grammar is much more complicated than in English, every noun in Polish has 7 different grammatical cases. Declension is the changing of the form of a word, generally to express its syntactic functi...

Answered by Agnieszka M. • Polish tutor

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