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Why are some electromagnetic waves harmful to humans?

Electromagnetic (EM) waves form the electromagnetic spectrum with a range of wavelengths. EM waves that have wavelengths shorter than those of visible light include ultraviolet light, X rays and gamma rays, ...
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Answered by Keval H. • Physics tutor
9420 Views

Prove algebraically that the straight line with equation x = 2y + 5 is a tangent to the circle with equation x^(2) + y^(2) = 5

If a line is a tangent to a circle, it will have exactly one point where the line intersects the circle. Therefore, when we set the equation of the straight line equal to the equation of the circle, we shoul...
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Answered by Rawdah H. • Maths tutor
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¿Qué haces en tu tiempo libre?

Soy una persona muy creativa así que mis pasatiempos sean la misma. Me encanta bailar especialmente en estilo urbano o hip hop. Sólo empezó con bailar en mi universidad y el año pasado bailé en un concurso e...
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Answered by Saima A. • Spanish tutor
2273 Views

Why shouldn't you take antibiotics for a cold?

You may remember that there are broad categories of microorganisms that cause diseases, such as bacteria, viruses and fungi which all have different properties and ways of causing disease. Antibiotics are ma...
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Answered by Paulo L. • Biology tutor
2840 Views

I am having difficulty conjugating irregular verbs in future tense. How should I approach this?

Conjugating irregular verbs in Spanish may appear difficult at first but don't let this discourage you! With some revision of conjugation tables and short 5 minute quizzes at the start of every session we ca...
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Answered by Sofia K. • Spanish tutor
3424 Views