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wel
4 years ago
7

Dolphins communicate using compression waves (longitudinal waves).  Some of the sounds dolphins make are outside the range of hu

man hearing.
Upon spotting a hungry shark, dolphin A sends a message to dolphin B.  To send this message as effectively as possible, dolphin A would
Physics
2 answers:
White raven [17]4 years ago
8 0
The dolphin would send an underwater message because the water is denser than air and therefore the sound would be louder and would travel faster. The denser the object the faster the sound travels.
11Alexandr11 [23.1K]4 years ago
8 0

Explanation:

Sound is a longitudinal wave. Sound wave consists of compression and rarefaction. It needs a medium to travel. It can travel in solid, liquid and gas. It travels faster in solid in comparison to liquid.

Dolphins communicate with each other using higher frequencies which are outside the range of human hearing.

In the given problem Dolphin A sends a message to dolphin B. Sound will travel through the water. Dolphin A sends a message to dolphin B underwater. A denser medium produces a louder sound.

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A 5.0 A current is set up in a circuit for 6.0 min by a rechargeable battery with a 6.0 V emf. By how much is the chemical energ
Andre45 [30]

Answer:

The chemical energy of the battery was reduced in 10800J

Explanation:

The first thing to take into account is that the stored energy in a battery is in Watts per second or Joules (W\cdot s=J). It means that the battery provides a power for a certain time.

The idea is to know how much W\cdot s has been consumed by the circuit.

The first step is to know the power that is consumed by the circuit. It is P=V\cdot I. The problem says that the circuit consumes a current of 5.0A with a voltage of 6.0V. It means that the power consumed is:

P=V\cdot I=(6.0V)\cdot (5.0A)=30W

The previous value (30W) is the power that the circuit consumes.

Now, you must find the total amount of power that is consumed by the circuit in 6.0 minutes. You just have to multiply the power that the circuit consumed by the time it worked, it means, 6.0 minutes.

energy=P\cdot t=(30W)\cdot (6.0min)=180W\cdot min

You must convert the minutes unit to seconds. Remember that 1 minute has 60 seconds.

energy=P\cdot t=(30W)\cdot (6.0min) \cdot \frac{60s}{1min}=10800W\cdot s=10800J

Thus, the chemical energy of the battery was reduced in 10800J

8 0
4 years ago
The different between capactance wnd capacitor
velikii [3]

Answer:

The parallel plate capacitor is the simplest form of capacitor. ... The property of a capacitor to store charge on its plates in the form of an electrostatic field is called the Capacitance of the capacitor. Not only that, but capacitance is also the property of a capacitor which resists the change of voltage across it.

Explanation:

credits :- adultsscience

8 0
3 years ago
Read 2 more answers
Randomly assigning students to two different groups in an experiment on
Mars2501 [29]

Answer:c

Explanation:

8 0
4 years ago
Read 2 more answers
The potential energy between two atoms in a particular molecule has the form U(x) = 2.1 x 8 − 5.2 x4 where the units of x are le
a_sh-v [17]

Answer:

x\approx 0.948

Explanation:

The correct formula for the potential energy between two atoms in a particular molecule is:

U(x) = \frac{2.1}{x^{8}}-\frac{5.2}{x^{4}}

Where x is the distance.

According to the definitions of potential energy and work, as well as the Work-Energy Theorem and the Principle of Energy Conservation. The relation between that and related force is:

F = -\frac{dU}{dx}

The function is derived in terms of distance:

F (x) = \frac{84}{5\cdot x^{9}} -\frac{104}{5\cdot x^{5}}

Then, it is needed to find at least of x so that F(x) equals to 0.

\frac{84}{5\cdot x^{9}}-\frac{104}{5\cdot x^{5}}=0

\frac{84}{x^{4}}-104 = 0

84-104\cdot x^{4} = 0

x=\sqrt[4]{\frac{84}{104} }

x\approx 0.948

7 0
3 years ago
Watery clay soil slides down a mountain is an example of what
harkovskaia [24]
Erosion. Which is the transportation of sediment or any type of earth like material.
5 0
3 years ago
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