Top answers

How do I express y=acosx+bsinx in the form y=Rcos(x-c)?

From the addition formula, we know that: Rcos(x-c) = Rcos(x)sin(c)+Rsin(x)cos(c) Therefore: acos(x)+bsin(x) = Rcos(x)cos(c)+Rsin(x)sin(c) If we equate the coefficients of cos(x) and sin(x) we see that: acos(...
DR
Answered by Daniel R. • Maths tutor
27768 Views

What are the 'rules' of oscillation?

-Velocity is largest at the centre -Acceleration is greatest at the Amplitude -Restoring Force is greatest at the amplitude -Elatsic Potential Energy is greatest at the amplitude -Kinetic Energy is greatest ...
KD
Answered by Katie D. • Physics tutor
9243 Views

How do I test for the presence of a carboxylic acid?

Add NaHCO 3 or K 2 CO 3 the reaction will produce CO 2 i.e Bubbles!
KD
Answered by Katie D. • Chemistry tutor
7832 Views

What is a chiral carbon?

A carbon atom bonded to 4 different groups.
KD
Answered by Katie D. • Chemistry tutor
7477 Views

What is the all or nothing principle?

Basically this means that if the threshold voltage of a neurone is reached -40mV, then a stimulus will be generated of always +40mV. If the threshold is not reached then there will be no signal.
KD
Answered by Katie D. • Biology tutor
10503 Views