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An infared wave has a wavelength of 1.5 x10^–6 m. The speed of this wave is 2.2 × 10^8 m/s. Calculate the frequency of the wave. Give your answer in standard form and to 2 significant figures.

First, I would highlight the numbers you need to use for this question and label them as v and λ. This makes them easier to find once you start inputting them into the calculator. Find the equation you need ...
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Answered by Megan H. • Physics tutor
3331 Views

Explain the difference between a real and a virtual image.

Real images are formed where two real rays cross, and they can be projected onto a screen. Whereas virtual images are seen where virtual rays intersect, they are imaginary and therefore cannot be projected o...
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Answered by Ellen W. • Physics tutor
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What is the law of conservation of energy?

The law of conservation of energy states that energy cannot be created or destroyed it can only be transferred from one form to another. An example of this is when an object is falling: its gravitational pot...
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Answered by Jared R. • Physics tutor
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A circuit with a cell of voltage 6V and two resistors of resistance 6 Ohms each connected in parallel. What is the current through the Cell?

Step 1 - draw the circuit. Step 2- Finding total resistance of resistors in parallel, 1/Rt = 1/R1 + 1/R2 where Rt is the total resistance of the circuit. Step 3- Use Ohms laws V=IR and rearrange for I to fin...
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Answered by Robyn S. • Physics tutor
3129 Views

What is the actual difference between the weight and the mass of an object?

Weight and mass are related to each other, but not the same thing. When you step onto a weighing scale and it gives you a number (this could be in kilograms, or pounds, etc), this is your mass- it is telling...
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Answered by Amy S. • Physics tutor
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