Dolphins of the open ocean are classified as type ii odontocetes (toothed whales). these animals use ultrasonic "clicks" with a frequency of about 55.3 khz to navigate and find prey.
(a) suppose a dolphin sends out a series of high-pitched clicks that are reflected back from the bottom of the ocean 86 m below. how much time elapses before the dolphin hears the echoes of the clicks? (the speed of sound in seawater is approximately 1530 m/s.)
answer in seconds
(b) what is the wavelength of 55.3 khz sound in the ocean?
answer in mm

Part a)

Part b)

Explanation:

Part a)

As we know that the sound will go to the bottom of the sea and then come back to the dolphin

so here total distance moved by the whale is given as

Part b)

As we know that frequency and wavelength are related to the speed of the wave as

relativism, roughly put, is the view that truth and falsity, right and wrong, standards of reasoning, and procedures of justification are products of differing conventions and frameworks of assessment and that their authority is confined to the context giving rise to them. more precisely, “relativism” covers views which maintain that—at a high level of abstraction—at least some class of things have the properties they have (e.g., beautiful, morally good, epistemically justified) not simpliciter, but only relative to a given framework of assessment (e.g., local cultural norms, individual standards), and correspondingly, that the truth of claims attributing these properties holds only once the relevant framework of assessment is specified or supplied. relativists characteristically insist, furthermore, that if something is only relatively so, then there can be no framework-independent vantage point from which the matter of whether the thing in question is so can be established.

relativism has been, in its various guises, both one of the most popular and most reviled philosophical doctrines of our time. defenders see it as a harbinger of tolerance and the only ethical and epistemic stance worthy of the open-minded and tolerant. detractors dismiss it for its alleged incoherence and uncritical intellectual permissiveness. debates about relativism permeate the whole spectrum of philosophical sub-disciplines. from ethics to epistemology, science to religion, political theory to ontology, theories of meaning and even logic, philosophy has felt the need to respond to this heady and seemingly subversive idea. discussions of relativism often also invoke considerations relevant to the very nature and methodology of philosophy and to the division between the so-called “analytic and continental” camps in philosophy. and yet, despite a long history of debate going back to plato and an increasingly large body of writing, it is still difficult to come to an agreed definition of what, at its core, relativism is, and what philosophical import it has. this entry attempts to provide a broad account of the many ways in which “relativism” has been defined, explained, defended and criticized.

explanation:

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle