Search our library of homework questions

Top answers

All subjects

All levels

How does increasing interest rates affect inflation?

What are interest rates? Interest rates are the rate of return offered on any kind of loan or investment. In reference to monetary policy and manipulation, the interest rate refers to the rate set by the ...

Answered by Oscar B. • Economics tutor

1343 Views

Explain the lock and key model of enzyme action, including how they are denatured

The lock and key model refers to an analogy used to describe the specific action of an enzyme with a substrate . During this process, the enzyme is acting as the lock and has a section called the active s...

Answered by Hannah F. • Biology tutor

40646 Views

Explain why the stability of a car can be improved by widening the wheel base and lowering the centre of gravity.

A car will topple over when it is tilted so far that the line of action from the centre of gravity falls outside of the wheel base, causing a resultant moment around the side being tilted. Extending the b...

Answered by Tim H. • Physics tutor

1616 Views

There are two stable isotopes of Bromine, Br-79, Br-81. If a sample of Br2 is fed into a mass spectrometer, how many peaks would be observed in the spectrum?

There should be five peaks. In the process of bombarding the Br2 molecule with electrons to charge it, the molecule can fragment into 2 Br atoms. We should therefore expect to see peaks at 79 and 81 m/z. ...

Answered by Tim H. • Chemistry tutor

10862 Views