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Describe the processes in the formation of a coastline.

headlands and bays: differences in rock strength and resistance to erosion, different erosion rates = headlands and bays.cracks and caves forming from erosion, both sides of the headland.An arch forms.Roof c...
PR
Answered by Polly R. • Geography tutor
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An electromagnetic wave has a wavelength of 3.0m and a speed of 3x10^8 m/s. State what type of radiation this wave is and calculate the period of the wave.

For the first part we know that the wavelength is over 1.0 m so it is a radio wave.To find the period we first find the frequency as the period is the reciprical of the frequency. (T = 1/f).To find the frequ...
AP
Answered by Anna P. • Physics tutor
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Solve the following simultaneous equations. x^2+y^2=25. y-3x=13

The key to solving simultaneous equations is trying to reduce them into one equation. You can see that one of these equations is quadratic, so you should be thinking there will be 2 answers for x and y. You ...
BW
Answered by Ben W. • Maths tutor
6232 Views

Solve these two simultaneous equations.

eq.1 4x+3y=7eq.2 3x+7y=16 You want to eliminate one of the variables (either x or y) reducing the problem to just one equation with one variable which can be solved. This can be done by multiplying each equa...
TH
Answered by Tobias H. • Maths tutor
4956 Views

Two students are provided with a starting pistol, a stopwatch and a long measuring tape. The starting pistol produces a loud sound and a puff of smoke. Describe how the students use the apparatus to calculate the speed of sound.

The students stand at a distance of 200 m from each other (measured with the measuring tape). Student 1 fires the pistol, Student 2 starts the stopwatch when they see smoke from the pistol and stop it when t...
JM
Answered by Josh M. • Physics tutor
15846 Views