Answer:
Co(cobalt) is the answer
Explanation:
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Answer:
Explanation:
So lead has a density of 11.34 g/cm^3 according to a quick google search. If this is not the value you are using, just replace what you do use where I put 11.34
knowing the density, if we knew the volume we could find the mass by unit conversion since g/cm^3 * cm^3 = g, so we would multiply the density by the volume. And the question gives us the means to find the volume.
Volume of a cylinder is area of its base times the height. Area of its base, a circle (since it's a cylinder) is π*r^2 where r is the radius and π is roughly 3.14. I will leave π as the symbol until the end so it's easier to deal with.
So volume = area * height = πr^2*h = π4^2*10 = 160π (I moved pi to the back). It's units are cm^3 since both measurements were in cm. You can feel free to multiply π by 160 now if you like. Anyway, now that we have the volume we multiply it by the density. so 160π cm^3 * 11.34 g/cm^3 = 1814.4π g. If you multiply that by 3.14 for π you get 5697.216 g. And there's the mass. Let em know if there was something you didn't understand.
Answer:
the independent variable (sometimes known as the manipulated variable )
Explanation:
is the variable whose change isn't affected by any other variable in the experiment
Answer:
Final pressure of light bulb is 2.03 atm.
Explanation:
Given data:
Initial pressure = 1.34 atm
initial temperature = 26 °C
Finial temperature = 179 °C
Final pressure = ?
Formula:
P1/T1 = P2/T2
Solution:
First of all we will convert the °C into kelvin.
179 +273 = 452 K
26 +273 = 299 K
P2 = P1×T2/T1
P2 = 1.34 atm . 452 K / 299 K
P2 = 605.68 atm/ 299
P2 = 2.03 atm
The quality or state of being volcanic.
