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Calculate the resistance of a uniform wire of diameter 0.5mm, length 2m and resistivity 1.7x10^-8Ωm.

R=ρ L/AR= (1.7*10^-8 2)/(0.0005^2π/4)R=0.173Ω

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Explain what is meant when it is said that there are inefficiencies in the production of goods and the allocation of resources.

The economy achieves optimal allocation of resources when productive and allocative efficiency are attained: · Productive efficiency occurs when products are made using the least poss...

Answered by Blanca S. • Economics tutor

5628 Views

Explain the process of human digestion from the mouth to the stomach.

Food enters the mouth and is digested mechanically and chemically. Mechanical digestion is chewing (mastication) by the teeth and breaks the food into smaller pieces. Chemical digestion is by salivary amy...

Answered by Akash K. • Biology tutor

1861 Views

There are 2 green jelly beans, 5 are yellow and 13 are red. Sue picks one jelly bean. What is the possibility that sue pick a jelly bean that is not yellow?

Answer: 3/4 2 green and 13 red therefore 15 of the 20 is not yellow simplifying this probability gives you 3/4.

Answered by Ann P. • Maths tutor

2054 Views

Describe the structure of metal and its bonding and how its structure contribute to its properties.

Metals have a distinct bonding known as metallic bonds, where there is a sea of delocalised electrons and metal ions present. This is due to electrons leaving the atom forming a positive metal ion and a s...

Answered by Ann P. • Chemistry tutor

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