Tuesday
July 29, 2014

Posts by Duane


Total # Posts: 34

Science
a jogger with a mass of 60.0kg is moving at a speed of 3.0m/s. what is the jogger's kinetic energy? KE=270 joules Can you show me the steps to this answer please.

science
why should you not attempt to take a picture of fluorine?

science
homogenized milk is composed of microscopic globules of fat suspended in a watery medium. is homogenized milk a true solution?

science
element 118 was reportedly synthesized in 1999, but the claim was later retracted. as a consequence of that experiment, element 116 was discovered. to what period and group would each of these two elements belong, and what known elements should each resemble?

science
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 47.997 /84.015 /84.015 /84.015 /84.015 .2737 .0120 .1430 .5713 *100 *100 *100 *100 27.37% 1.2% 14.3% 57.13% did i do this correctly?

science
what is the correct number of protons, neutrons and electrons in a neutral Cadmium-112 atom?

science
Name the ionic compound form when a Magnesium reacts with chlorine?

science
how would you go about locating the magnetic north pole assuming it were still on land?

science
what happens when you cut a bar magnet in half? if it were continually cut in half, then would it finally yield two magnetic monopoles?

science
Why when you look at a window from the inside at night, two similar images, one behind the other, are often seen?

science
if the Moon's spherical surface gave specular reflection, what would it resemble at full moon?

science
why do the tones sound full and rich when you sing in the shower?

science
how fast would a "jet" fish have to swim to create an "aquatic" boom?

science
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 wind?

science
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 present after 93 hours?

science
Is this balanced correctly NaOH + H2SO4 = Na2SO4 + H2O? In this equation, Sodium (Na) and Hydrogen (H) atoms are not balanced. There are 2 atoms of Sodium (Na) on Right Hand Side, so we can multiply NaOH with 2 on Left Hand Side. This balances the Sodium (Na) atoms. Now, Hydro...

science
Explain the process of reflection.

science
A car traveling about 50km/h collides head-on with something solid. The car crumples, slows down and stops. Use the law of inertia to explain why a crash dummy not restrained by a seat belt in the car slams into the steering wheel.

science
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 dating techniques. Aft...

science
Explain why radioactivity can be used as a "clock" to measure the march of geologic time.

science
What is the Molarity of a solution formed by mixing 10.0g H2SO4 with enough water to make 100.0mL of solution?

science
What is the Molarity of a solution formed by mixing 10.0g H2SO4 with enough water to make 100.0mL of solution?

science
Sodium hydrogen carbonate NaHCO3, also called baking soda, is an active ingredient in some antacids used for the relief of indigestion. Determine the percent composition of sodium hydrogen carbonate.

science
A student expends 9.6W of power lifting a textbook 0.50m in 3.0s with a constant velocity. How much work is done?

science
How much heat must be removed from 0.20kg of water at 10.0oC to form ice at 0oC?

science
In the construction of bridges and skyscrapers, gaps must be left between adjoining steel beams to allow for the expansion and contraction of the metal due to heating and cooling. The temperature of a sample of iron with a mass of 10.0g changed from 50.4oC to 25.0oC with the r...

Science
All of these are correct. Thank you

2nd Math
My daughter is learning about comparison problems. I would like to know how to write one and solve it.

Physics
A car is traveling due east at 25.0 m/s. If it accelerates at 0.750 m/s^2 due east find it's velocity after 8.50 s have elapsed.

Chemistry
A student reacts 0.1212 g of an Mg/NaCl mixture with hydrochloric acid. The volume of hydrogen saturated with water vapor collected at 20.0C was measured to be 42.7 ml. The column of water that remained in the buret was 10.3 cm high. If vapor pressure of water = 17.5 mmHg at t...

Physics
If 60 Cal. are added to 6 g. of iron at 20 degrees Celsius what is the final temp.

Math-Trigonometry
Master Chief is trapped on an island with a Scorpion Tank as his only means of defense. An enemy Covenant jet fighter just landed on a smaller island across the water. Master Chief would like to fire a shell across the water directly at the jet. However, as the Scorpion Tank c...

math
How do I figar out the third of a amount of money

science
If a cube of Jello is cut into two pieces, what property of the pieces did not change?

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