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.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

Match each scenario to the form of energy it represents

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.