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Describe how a crumple zone on a car reduces injury to the driver in a crash.

During a crash the velocity of the car is reduced to zero. The deceleration of the car exerts a force on the driver causing injury. Without a crumple zone the change in velocity is instantaneous therefore a ...
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Answered by Thomas L. • Physics tutor
3713 Views

Explain the trend in reactivity of group 1 metals.

Going down the 1st column of the periodic table the group 1 metal have increasing numbers of electrons.All group 1 metals have a single electron in their outer shell and with an increasing number of electron...
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Answered by Thomas L. • Chemistry tutor
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Find the antiderivative of the function f(x)=cos(2x)+5.

In order to find the antiderivative of the function we're given, we first have to study the general structure of the function. This function consists of a sum between cos(2x) and 5. Therefore, we have : F(x)...
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Answered by Tutor149135 D. • Maths tutor
5659 Views

Why are antibiotics not used to treat viral infections?

Antibiotics target a variety of sites on bacteria (disruption DNA or cell wall or protein synthesis). These are not found in viruses - viruses lack cell walls, ribosomes or cell membranes.Antibiotics would n...
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Answered by Karl L. • Biology tutor
4181 Views

Give one method of immobilising an enzyme. What are the benefits of using immobilised enzymes?

Methods:encapsulate in sodium alginate beadstrap in the pores of silica geladsorption onto glass or clay or resinwithin a polymer or microspheresby covalent bonding to a support material such as collagen Ben...
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Answered by Karl L. • Biology tutor
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