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Questions (23)

which of the two system in figure 4 do you think will need the largest motor
1. 4 answers
2. 1,398 views
why should you not attempt to take a picture of fluorine?
1. 0 answers
2. 462 views
homogenized milk is composed of microscopic globules of fat suspended in a watery medium. is homogenized milk a true solution?
1. 1 answer
2. 563 views
element 118 was reportedly synthesized in 1999, but the claim was later retracted. as a consequence of that experiment, element
1. 1 answer
2. 959 views
Determine the percent composition of sodium hydrogen carbonate.Na H C O3 1*22.999 1*1.008 1*12.011 3*15.999 22.999 1.008 12.011
1. 0 answers
2. 580 views
what is the correct number of protons, neutrons and electrons in a neutral Cadmium-112 atom?
1. 0 answers
2. 661 views
Name the ionic compound form when a Magnesium reacts with chlorine?
1. 1 answer
2. 597 views
how would you go about locating the magnetic north pole assuming it were still on land?
1. 1 answer
2. 386 views
what happens when you cut a bar magnet in half? if it were continually cut in half, then would it finally yield two magnetic
1. 3 answers
2. 889 views
Why when you look at a window from the inside at night, two similar images, one behind the other, are often seen?
1. 1 answer
2. 534 views
if the Moon's spherical surface gave specular reflection, what would it resemble at full moon?
1. 1 answer
2. 635 views
why do the tones sound full and rich when you sing in the shower?
1. 1 answer
2. 545 views
how fast would a "jet" fish have to swim to create an "aquatic" boom?
1. 1 answer
2. 1,326 views
the speed of sound in air is given for still air. how would wind affect the speed? what would happen if you shouted into the
1. 1 answer
2. 511 views
A half-life of mercury-195 is 31 hours. If you start with a sample of 5.00g of pure mercury-195, how much of it will still be
1. 2 answers
2. 3,431 views
Is this balanced correctly NaOH + H2SO4 = Na2SO4 + H2O?In this equation, Sodium (Na) and Hydrogen (H) atoms are not balanced.
1. 1 answer
2. 879 views
Explain the process of reflection.
1. 2 answers
2. 502 views
A car traveling about 50km/h collides head-on with something solid. The car crumples, slows down and stops. Use the law of
1. 1 answer
2. 938 views
Explain why radioactivity can be used as a "clock" to measure the march of geologic time.
1. 2 answers
2. 545 views
What is the Molarity of a solution formed by mixing 10.0g H2SO4 with enough water to make 100.0mL of solution?
1. 3 answers
2. 1,785 views
What is the Molarity of a solution formed by mixing 10.0g H2SO4 with enough water to make 100.0mL of solution?
1. 1 answer
2. 1,236 views
Sodium hydrogen carbonate NaHCO3, also called baking soda, is an active ingredient in some antacids used for the relief of
1. 0 answers
2. 1,039 views
In the construction of bridges and skyscrapers, gaps must be left between adjoining steel beams to allow for the expansion and
1. 2 answers
2. 2,361 views

Answers (2)

I want to become teacher
While the moment in time at which a particular nucleus decays is unpredictable, a collection of atoms of a radioactive nuclide decays exponentially at a rate described by a parameter known as the half-life, usually given in units of years when discussing

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