The efficiency is the number of times a machine multiplies the input force

true or false

An alarm clock is placed in a sealed container without any air. Describe what you will observe concerning the mechanical waves and the EM waves when the alarm clock goes off.

Which of the following chemical symbols represents the element silver? a. s b. ag c. au d. si

Oxygen gas generated in an experiment is collected at 25.0°C in a bottle inverted in a trough of water. The total pressure is 1.000 atm corrected for atmospheric pressure.

What is the molar mass of (NH4) 2CO3

Can u make slime with takyglue, shavingcreame, Landry deterget mixed with baby oil, water

The first-order decomposition of n2o at 1000 k has a rate constant of 0.76 s-1. if the initial concentration of n2o is 10.9 m, what is the concentration of n2o after 9.6 s

When a catalyst lowers the activation energy of a reaction the rate of the reaction?

Liquids: A) must be contained to stay in one spot B) have a variable volume, but a fixed mass C) are usually more dense than solids and gases D) cannot be changed into gases

Given the following list from the activity series of metals (from most active to least active) K, Na, Al, Mn, Cr, Cd, Co, Pb, Hg which reaction would you NOT expect to occur? 1. Co²⁺ (aq) + Al (s) → Al³⁺ (aq) + Co (s) 2.

Chemical reactions that release energy A. will not occur. B. need catalysts to occur. C. will always explode. D. often occur spontaneously.