DESPERATE WILL GIVE BRAINLIST Consider the geologic time scale shown below. A scientist discovered two fossils. Fossil A is from the Triassic time period. Fossil B is from the Cambrian time period. Which one is older?

Question 10 options:

A is older.

B is older.

They are the same age.

We cannot determine which one is older.

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Describe uniform velocity and variable velocity in short