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What is the mass of an object travelling at 15 m/s with a kinetic energy of 100 J?

Kinetic Energy (Ek) = 1/2(mv2).This can be rearranged such that, m = (2Ek)/v2we know from the question that E= 100 J and we know that v = 15 m/sso ...

TD
3318 Views

Dipen and Nisha are planning their wedding reception. Nisha says, “I want to invite 70 guests.” Dipen says, “If we invite one-fifth fewer guests, we will save more than £500” Is Dipen correct? (Taken from Nov 2014 AQA Unit 2)

Need to calculate two things in order to answer the question:

1) Total cost of Nisha's 70 guests.

2) Total cost of Dipen's 'one-fifth fewer' guests.

For Nishen...

AN
Answered by Alex N. Maths tutor
5545 Views

What's the difference between distance and displacement

Distance is a scalar, meaning it only has a magnitude. Displacement is a vector, meaning that it has both magnitude and direction. For instance, distance can state that I am "x" metres away f...

EG
Answered by Emma G. Physics tutor
16708 Views

Differentiate y=x*ln(x^3-5)

We can immediately see that more than differentiation rule will be needed here. The expression in question is the product of two smaller expressions, so the product rule may be useful. But to apply the...

NN
Answered by Nat N. Maths tutor
6636 Views

Why do you want to be a doctor rather than a nurse?

This is a commonly asked question in medical interviews, however several people struggle to come up with a strong answer. 

MS
Answered by Molly S. UCAT tutor
3610 Views

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