Which of the following is not an example of a communication channel?

a. television

b. Internet

c. letters

d. traveling

Where would you find the element with the least mass?

You are given two rectangular blocks of shiny metal, Block A and Block B, and are asked to determine which one will float in a bath of mercury (a metal that is liquid at room temperature).

What is the best description of sound waves? a. A source vibrates up and down, causing air molecules to move up and down perpendicular to the direction the wave is transmitted . b.

Describe what it means to view a moving object from a frame of reference. Give an example to illustrate your explanation.

Consider a cylindrical nickel wire 1.6 mm in diameter and 2.5 * 104 mm long. Calculate its elongation when a load of 320 N is applied.

What happens to the resistance of a wire as its length increases? A. The resistance decreases. B. The resistance is not affected by a change in wire length. C. The resistance alternates between high and low values. D. The resistance increases.

What is true about molecular compounds that dissolve in water

What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy with a smooth brightness profile, lacking the central bulge and disk of a spiral galaxy A spiral galaxy with fuzzy and

Which process causes wells on land to become saline, making them unusable for drinking water? A. Erosion B. Echo sounding C. Eutrophication D. Groundwater infiltration

A farmer uses a tractor to pull a 150 kg bale of hay up a 15∘ incline to the barn at a steady 5.0 km/h. The coefficient of kinetic friction between the bale and the ramp is 0.40. Part A What is the tractor's power output?