Top answers

What's the difference between inertial and gravitational mass?

Like charges repel and different charges attract, i.e. charges feel an electromagnetic (EM) force. Electrons (fundamental particles that 'orbit' around the nuclei of atoms) carry a negative charge of -1.6 10...
YB
Answered by Yassine B. • Physics tutor
2526 Views

Solve the simultaneous equations: 3x+4y=19, x-6y= -23.

In order to solve these simultaneous equations we first want to eliminate one of the variables (x or y) and find a solution to the variable remaining (y or x) and then use this solution to find the second va...
NL
Answered by Nathalie L. • Maths tutor
4406 Views

Explain how enzymes work.

Worth four marks Enzymes are biological catalysts which are used in reactions. A reaction will typically involve an enzyme and a substrate. Enzymes are complementary to the substrate they combine to form an ...
MK
Answered by Moyo K. • Biology tutor
4008 Views

Summarise what is meant by Classical Conditioning.

Classical conditioning refers to a type of learning in which a biologically reactive stimulus is paired with a stimulus which was previously neutral. The result of this process is learning a response to a pr...
CM
Answered by Clare M. • Psychology tutor
3207 Views

How does acidic buffer work?

Acidic buffer is solution which containing high concentration of weak acid and its conjugate base. Its pH would remain relatively constant when adding small amount of acid or base.i.e. CH 3 COOH = H + + CH 3...
XH
Answered by Xin H. • Chemistry tutor
3369 Views