15. Describe how the speed of sound would change as it first travels through a

Solid:

Liquid:

Gas:

(2pts)

As an object falls to the ground, what happens to its energy? Ignore air resistance in this scenario. A) energy is converted from gravitational potential energy to kinetic energy.

A 76-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 840 N. What is the acceleration of the elevator? 1.25 Correct: Your answer is correct. m/s2 upward

Atoms are the smallest portions of an element that retain the original characteristics of the element. True or false

A 25.5 kg child swings on a swing set. At the top of the swing's arc, the child reaches a height of 1.50 m from the ground. What are the child's PE and KE at the top of the arc? 188 J and 1883 OJ and 375) 375 J and OJ

3. One atom of silicon can properly be combined in a compound with A. One atom of chlorine. B. Three atoms of hydrogen. C. Two atoms of oxygen. D. Four atoms of calcium.

The equation e = mc2 relates mass and a. energy b. force c. work d. gravity

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable

If a sample of gas is heated at a constant pressure what will happen to the volume of the gas

1. What is the speed of sound in air that has a temperature of 90.0 °C?

What effect does a doubling of the mass have upon the acceleration of the object? Be quantitative.