When is a model used in science?

A) to demonstrate something that would otherwise be too complex to study in real life

B) to demonstrate something that is too large or too small in real life

C) both of the above

The transmission coefficient of the hypothetical disease dumas fever is 0.2. if the combined death and recovery rate is 0.4, what is the threshold density for dumas fever?

What force acts on a projectile in the horizontal direction?

A coin is tossed upward with an initial velocity of 32 feet per second from a height of 16 feet above the ground. The equation giving the object's height h at any time t is h = 16 + 32 t - 16 t 2. Does the object ever reach a height of 32 feet?

Assuming that voltage remains constant, what happens to the current in a wire if the length of the wire increase?

Convection A) is energy similar to radiant heat from the sun. B) is the result of conductive heat loss to the air that overlies the surface of the body. C) is the direct transfer of energy through physical contact. D) changes a liquid to a vapor.

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

A ship leaves the island of Guam and sails a distance 255 km at an angle 49.0 o north of west. Part A: In which direction must it now head so that its resultant displacement will be 125 km directly east of Guam?

What is the molecular geometry of a methane (CH4) molecule?

Why do scientist use radioactive decay to figure out how old stuff is