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What is action painting and where does it stand in modern art?

Action painting is an artistic style and technique consisting in the splashing, spilling and throwing of paint directly onto the canvas. It was developed in America in the middle of the 20th century (1940...

EP
2885 Views

Explain what is meant by tensile stress and tensile strain.

Tensile stress is the force exerted per unit cross-sectional area on an object.

Tensile strain is the extension per unit original length of an object.

PJ
Answered by Penelope J. Physics tutor
22965 Views

Given that z = a + bj, find Re(z/z*) and Im(z/z*).

By definition z*  = a - bj.

We can write z/z* = ((a+bj)/(a-bj))*(a+bj)/(a+bj).

We calculate this to be z/z* = (a^2-b^2)/(a^2+b^2) + j(2ab)/(a^2+b^2).

Therefore, Re(z/z*) = (a^2-b^2)/(...

PJ
5249 Views

State what is meant by isotopes?

Isotopes are atoms with the same number of protons, but a different number of protons. Therefore, isotopes have the same atomic number but a different mass number.

An example of an isotope is carbo...

CH
Answered by Charlie H. Physics tutor
5449 Views

Compare the advantages and disadvantages of the two methods of generating electricity (figure 1 in answer):

Figure 1 (AQA GCSE Science A Physics: Higher Tier):

The wind turbine costs £50 000 to buy and install.

The hydroelectric generator costs £20 000 to buy and install.

CH
Answered by Charlie H. Physics tutor
19235 Views

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