When the diaphragm moves downward, the lungs fill with air. True or False?

A particle moves along the x-axis with velocity given by v (t) = 3t2+6t for time tâ¥0. If the particle at position x=2 at time t=0, what is the position of the particle at time t=1? a) 4 b) 6 c) 0 d) 11 e) 12

Mary slides down a snow-covered hill on a large piece of cardboard and then slides across a frozen pond at a constant velocity of 2.40 m/s.

In which situations is heat flow present? Check all that apply. A substance feels warm. One substance does not have a temperature. Two substances have the same temperature. One substance transfers some of its thermal energy to another substance.

A spring is compressed between two objects with unequal masses, m and M, ad held together. The objects are initially at rest on a horizontal frictionless surface. When released, which of the following is true?

A siren produces waves in the air. If the frequency of the waves is gradually decreasing which of the following changes to the waves is most likely occurring?

Water is a compound. O A. True B. False

How do air quality scientists ensure the air is cleaned? What steps do they take?

Is a mirrors surface opaque or transparent or translucent?

Sound waves can combine to become bigger or smaller true or false

Archimedes supposedly was asked to determine whether a crown made for the king consisted of pure gold (density of gold is 19.3 * 103 kg/m3). According to legend, he solved this problem by weighing the crown first in air and then in water.