suyashankur09

In an experiment with a helium-neon laser which has a wavelegnth of 632.8 nm you iluminate a single slit that is positioned 0.50 m from a screen. If the width of the single slit is 0.15 mm, what would be the width of the central maximum you would expect to measure when it forms a diffraction pattern on the screen?

In a single-slit diffraction experiment, if the width of the slitincreases, what happens to the width of the central maximum(pattern) on the screen?

As the distance the spoon is pulled down (x) increases, what happens to the maximum height of the marshmallow (h)?  

How menstruation linked with ovulation?

What if we divide 2 and 0?

You placed a sample of a hydrate of calcium chloride (CaCl₂) in a weighed test tube, and weighed the filled test tube.
Then you heated it until no more water was evolved. After cooling, you weighed the test tube again.

Mass of empty tube (g) 13.5
Mass of filled tube before heating (g) 18.5
Mass after cooling (g) 16.2

Calculate the following:
1.Mass of hydrate originally taken

2.Mass of water evolved

3.Mass of anhydrous CaCl2 formed

4.Moles of anhydrous CaCl2

5.Moles of water evolved

6.Moles of water in the molecular formula of the hydrate (give your answer to 2 decimal places)

a sample of Vermilion - colored mineral was weighed in air , then weighed again while suspended in water. An object is buoyed by the mass of the fluid displaced by the object. In air, the mineral weighed 18.49g ; in water it weighed 16.21g . The densities of air and water are 1.205 g/L and 0.9982 g/cm^3 , respectively. What is the density of the mineral?

A student is given a crucible and asked to determine wheather it is made of pure platinum. The student first weighs the crucible in air and then weighs it suspended in water (density equals 0.9986 g/mL). The readings are 860.2 g and 820.2 g, respectively. Based on these measurements and given that the density of platinum is 21.45 g/cm³ , what should the students conclusion be? (hint: an object suspended in a fluid is buoyed yp the mass of the fluid displaced by the object, neglect the bouyancy of air).

please show work

A-(Please Show Work)

A Rock Weighs
143 g in air
82 g in H2O

What is the mass of H2O displaced?
Volume H2O displaced?
Density of the rock?

B-(Please Show Work)

A graduated cylinder weighs 28.102 g. A solution has been created which levitates a piece of PVC. The graduated cylinder containing 6.25 mL of that solution weighs 34.200 grams.

What is the density of the solution?

That of the PVC suspended in it?

Consider the following data for a rock:

Mass: 8.000 g

Initial Volume of Water in Graduated Cylinder: 50.0 mL

Final Volume of Water in Graduated Cylinder (after rock was added): 53.0 mL

Calculate the density of the rock

A. 13 g/mL

B. 0.38 g/mL

C. 2.7 g/mL

D. 3.0 g/mL

Volume of water (INCLUDING UNITS) in 10 mL graduated cylinder after pouring 1 tsp: 

 
Trial 1: _____________ Trial 2: _____________ Trial 3: _

What is an unknown compound?

f(x)= sin x + cos x , when x is between 0 and 2 pi

i found f ' (x) = cos x - sin x

how to find the x where cos x -sin x = 0 , in order to knowwhere is f increasing or decreasing between 0 and 2 pi

Please help,

What is the ph of 0.0333M. hno3?

What are [h3o=][oh-] and poh with of 9.85?

Let (S) be the paraboloid z=10-(x-1)^2-(y-2)^2 and let M be the highest point (relative to the plane Oxy) on (S ). Let (P) be the tangent plane to (S) at M. Which point from the following is on the plane (P) ? 

What is the difference between steam and boiling water?