Answers edited by Oscar L.

Back to user's profile
Next
Why are the rocks on the moon older than those on earth?
What observation of seismic-wave travel led to the discovery of Moho?
How much oxygen is the earth made of?
Why do stellar parallax measurements work only with relatively nearby stars?
In the fourth dimension, is it possible to have a quadruple bond?
The smallest daily tidal range occurs during which type of tide?
What is the closest star to Earth besides the sun?
How do nonmetals react with acids?
What is the Mojo layer inside the earth? How far down is it inside the earth?
Which planet has a moon with active volcanoes?
If sides A and B of a triangle have lengths of 1 and 6 respectively, and the angle between them is $\frac{π}{2}$ $(pi)/2$ , then what is the area of the triangle?
What was Andrija Mohorovicic famous for?
How do I evaluate cos(pi/5) without using a calculator?
How many known satellites does Mars have?
Given the following, what is the tension in the string when the nearest mass is a distance of 686 km from the Black hole? $G = 6.673 \times 10^{- 11} m^{3} k g - 1 s - 2$ $G=6.673×10^-11 m^3kg-1s-2$
A 2% by weight aqueous solution of NaCl (MW= 58.45) has a boiling point of 100.31 °C. What is the van't Hoff factor for NaCl?
What is an example of a double displacement reaction?
How do you evaluate $cot (690)$ $cot (690)$ ?
What silicate mineral is the basic building block of many rocks?
How do you simplify $arcsin (sin (\frac{π}{8}))$ $arcsin(sin(pi/8))$ ?
Where does the production of Carbon-14 occur?
What do scientists learn about fossils by using carbon-14?
What happens when the sun becomes a Black Dwarf? When will this take place in the future?
How do you evaluate $sec ({sec}^{- 1} (\frac{1}{3}))$ $sec(sec^-1(1/3))$ ?
Question #3f6e6
How many AU are between Saturn's largest moon, Titan from the sun and the earth?
The respective masses in amu of the proton, the neutron, and the nckel-60 atom are 1.00728, 1.00867, and 59.9308. What is the mass defect of the nickel-60 atom in g?
What are the six strongest acids? What are the six strongest bases?
Question #19980
How do you evaluate $tan ({sin}^{- 1} (- \frac{1}{6}))$ $tan(sin^-1(-1/6))$ ?
How do you balance $Z n {(O H)}_{2} + C H_{3} C O O H \to Z n {(C H_{3} C O O)}_{2} + H_{2} O$ $Zn(OH)_2 + CH_3COOH -> Zn(CH_3COO)_2 + H_2O$ ?
If $sin θ = \frac{1}{3}$ $sintheta=1/3$ and $θ$ $theta$ is in quadrant I, how do you evaluate $sin 2 θ$ $sin2theta$ ?
Decomposition of a $97.1 \cdot g$ $97.1*g$ mass of potassium chlorate, $K C l O_{3}$ $KClO_3$ , yields what mass of dioxygen?
If there is a supermassive black hole at the centre of our galaxy, why is our galaxy so stable?
Is it possible for the earth to be sucked into a black hole? If so, what would happen?
What is the angle between $< - 8, - 5, 2 >$ $<-8,-5,2 >$ and $< 9, 1, - 3 >$ $<9,1,-3>$ ?
What is the moho and what is it made of?
How would you balance the following equation: $S + {HNO}_{3} \to H_{2} {SO}_{4} + {NO}_{2} + H_{2} O$ $"S" + "HNO"_3 -> "H"_2"SO"_4 + "NO"_2 + "H"_2"O"$ ?
How many molecules are in 165 g of carbon dioxide?
Question #f635a
Is the earth slowly getting closer to the sun as it orbits it? If not, what keeps it from being drawn into the sun?
What is the dominant mountain range on the East Coast?
How do you express $cos (\frac{π}{3}) \cdot sin (\frac{5 π}{8})$ $cos(pi/ 3 ) * sin( ( 5 pi) / 8 )$ without using products of trigonometric functions?
In the southern hemisphere, does the Moon appear to start its waxing phase in reverse?
Which planet experiences constant daylight or darkness for 42 years at its poles?
Question #bb58b
A man heats a balloon in the oven. If the balloon initially has a volume of 4 liters and a temperature of 20°C, what will the volume of the balloon be after he heats it to a temperature of 250°C?
Is the Solar Wind comprised of actual matter along with energy? If so, is there a point at which the gravitational attraction of the Sun overcomes the Solar Wind?
What is the integral of $\int {tan}^{5} (x)$ $int tan^5(x)$ ?
What is the standard form of $y = {(x - 3)}^{2} + 3$ $y=(x-3)^2+3$ ?
How do scientists determine when one layer of the earth begins and ends?
What is the moho discontinuity state of matter?
Question #bdf57
Boron has two isotopes, boron-10 and boron-11. Boron-10 has five protons and five neutrons. How many protons and neutrons does boron-11 have? Explain.
How could the freezing point depression of $C a C l_{2}$ $CaCl_2$ be smaller than $N a C l$ $NaCl$ ?
Is the outer core made of iron and nickel?
It is generally agreed that the earth's moon was formed when a Mars sized planet grazed the early earth. Is it possible that this planet was slightly bigger and that it not only formed the moon but the left over went on to end up as Mercury?
How do you find the square roots of $- 25 i$ $-25i$ ?
What are examples of transition metals and their uses?
What is the equation of the circle with a center at $(7, 1)$ $(7 ,1 )$ and a radius of $2$ $2$ ?
What is the net ionic reaction for the acid-base reaction of $HCl$ $"HCl"$ with ${NaNO}_{3}$ $"NaNO"_3$ ?
Question #f339c
Question #07d32
Question #7221f
What is earth's lower mantle made of?
Does special relativity affect biological processes, such as aging?
A triangle has sides A, B, and C. Sides A and B have lengths of 2 and 4, respectively. The angle between A and C is $\frac{7 π}{24}$ $(7pi)/24$ and the angle between B and C is $\frac{5 π}{8}$ $(5pi)/8$ . What is the area of the triangle?
22.4 L of hydrogen gas contains how many molecules?
Clive's paper was returned with the answer "barium ll carbonate" marked wrong for the formula $B a C O_{3}$ $BaCO_3$ . Why was his answer wrong?
What does Ksp mean in chemistry?
Question #69fd6
How do you simplify hyperbolic function $cosh (ln t)$ $cosh(lnt)$ ?
Jupiter has sixteen satellites. What were the four largest ones discovered by Galileo?
Question #39c68
How many significant figures are in the measurement 811.40 grams?
Question #f472a
Next