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A bat emits a sound wave with a frequency of 25.0 kHz and a wavelength of 0.0136 metres. Calculate the speed of this sound wave.

In this question you are given frequency and wavelength of the wave and you are asked for the speed. You need to use the formula on you sheet that uses these three properties : v = f x λ, where v is the s...

Answered by Libby D. • Physics tutor

17322 Views

Ill give a name of an animal.

Show pictures of four animals and allow them to choose the correct one.

(can also be done for food, clothes, weather, time, places etc.)

Answered by Ines R. • Spanish tutor

1895 Views

Simplify: 2x + 6y + 2y - x

To answer this question you need to group the different terms to form the shortest equation possible. It is easiest to treat the x terms and the y term as seperate, so you have:

2x - x and ...

Answered by Libby D. • Maths tutor

3261 Views

Form a grammatically correct sentence with the following words: 'Klaus', 'der Hund' 'heute Morgen', 'mit', und 'spazieren'. Also Identify what kind of words they are.

One option for a correct sentence: Heute Morgen ging Klaus mit dem Hund spazieren. Heute Morgen- Adverb Klaus- Subjekt mit- Präposition der Hund- Objekt spazieren- Prädikat/ Verb

Answered by Laura B. • German tutor

1747 Views

If a ball of mass 5kg is dropped from rest, how far will it travel in the 3 seconds after it reaches 150m from it's original position? Write down the change in it's total energy after the 3 seconds. (ignoring air resistance)

Calculate the speed the ball is travelling at when it reaches 150m using v²= u²+ 2ax. 2) Calculate the distance travelled in 3 seconds by an object with a speed of that found...

Answered by Dafydd O. • Physics tutor

2144 Views