What is the lowest level of sound that can be detected by human hearing? 0 decibels 10 decibels 20 decibels 100 decibels

Is light a wave like or a particle like or both and why is it so

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.

What is the Hypothesis for force and fan carts

Atoms contain charged particles called protons and electrons. Each proton has a charge of + 1, and each electron has a charge of - 1. A sulfur ion has 16 protons and 18 electrons. Find the net charge. -34 +2 34 -2

Write three characteristics of particulate of natuere of matter

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called