What element are the cores of massive stars made of when a supernova occurs?

a. silicon

b. iron

c. oxygen

d. neon

You are discussing a material that has a strong resistance to the flow of electrons. This is a description of a A: Semi Insulator B: Semi Conductor C: Conductor D: Insulator

Which vessels have a tunica media with relatively more smooth muscle than elastic tissue, and an elastic membrane on each face of the tunica media?

2. A body starts with an initial velocity of 10 m s-1 and acceleration 5 m s2. Find the distance covered by it in 5 s.

A boat with an anchor on board floats in a swimming pool that is somewhat wider than the boat. Does the pool water level move up, move down, or remain the same if the anchor is (a) dropped into the water or (b) thrown onto the surrounding ground

Gymnasts often practice on foam floors, which increase the collision time when a gymnast falls. What effect does this have on collisions

These mystery elements are at the top of their families on the periodic table. An element that is in the same family as element C is likely to have which properties?

A short term affect of anorexia might include wight loss

True or false / the thermal energy of an object is the total energy of the particles in a material

A bucket of water of mass 16.0kg is suspended by a rope wrapped around a windlass, that is a solid cylinder with diameter 0.350m with mass 11.4kg. The cylinder pivots on a frictionless axle through its center.

Which principle explains how fiber optics can transmit data in the form of light pulses over large distances with little loss in signal strength? total internal reflection the index of refraction the index of reflection total internal refraction