The sound waves a bat releases hit an object and are_____ back to the bat.

Physics

2 answers:

irakobra [83]3 years ago

4 0

Your answer will be B) reflected

hope this helps

astraxan [27]3 years ago

4 0

Answer: The correct option is B.

Explanation:

Reflection of the sound is a process in which the sound bounces back after striking the object without getting absorbed in it.

The reflection of the sound phenomenon is used by a bat to detect its prey.

The bat emits ultraviolet wave and then this wave is reflected back to the ears of bat. In this way, a bat enables to detect how far its prey is.

Therefore, the sound waves a bat releases hit an object and are reflected back to the bat.

You might be interested in

State the difference between sensible heat and latent heat

Anna11 [10]

Latent heat is related to changes in phase between liquids ,gases and solids.

Sensible heat is related to changes in temperature of a gas or object with no change in phase.

6 0

3 years ago

A year 11 pupil with a mass of 55kg swinging back on their chair and falling off it at a speed of 0.6m/s. What is his kinetic en

posledela

Answer:

Uk = 9.9 J

Explanation:

To calculate the kinetic energie (Uk), you can make use of this formula:

Uk = 0.5 * m * v²

given m = 55 kg and v = 0.6 m/s

Substituting in the formula gives:

Uk = 0.5 * 55 * (0.6)²

Uk = 0.5 * 55 * 0.36

Uk = 9.9 J

Extra:

Now let's examine the formula in relation to the SI units. If you understand the following, it will give you great insight in how smart Phisics is inter twained by looking at formulas and their standard units. It will save you time in future to convert formulas, if you use the right standard units.

The formula for kinetic energie is:

Uk = 0.5 * m * v²

Standard SI unit for mass m is kg.

Standard SI unit for speed v is m/s.

So v * v = v² and therefore v² must have the standard SI unit of m²/s².

From the formula, you see that the unit of Uk must be kg*m²/s² and since Uk is normally given in J, these both forms must be the same !

The main unit for Uk is the Joule. Now please see the picture, which shows the relation between the J and other SI units. Please understand that you can construct your 'own' formulas based these units. Now here is the time saver:

Because almost always the right units are given in a question, or because sometimes you can look up a constant in a table with an exotic and seemingly complicated unit, but that says a lot about the formula which must have been some how involved!

By this, I hope you now understand the implication of using the right standard SI units and how that can help you figure out what formula is needed.