Rudy is playing a review game with his classmates. He gives them a set of clues and his friends have to guess what type of animal he is describing. These are the clues he gives them:
•Live on land and in the water
.They have scales, but breathe air through their lungs.
•Usually lay eggs with leathery shells
•Some give birth to live young.
Which type of animal did Rudy describe?

Which feature of a heating curve indicates a change ofn state

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.