Substances that transfer heat better than others are called

Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis?

kherson [118]

To test if the hypothesis is correct, a good way is to think of it this way:
Density = mass/volume, right?
Calculate the mass and volume of each and do the equation; this will test your hypothesis.
You will be left with the density of each. But, make sure that the sample sizes are the same (controlled variable) otherwise it will be an unfair test.

5 0

4 years ago

A chemist identifies compounds by identifying bright lines in their spectra. She does so by heating the compounds until they glo

allsm [11]

Answer:

PART A: 412.98 nm

PART B: 524.92 nm

Explanation:

The equation below can be used for a diffraction grating of nth order image:

n*λ = d*sinθ $_{n}$

Therefore, for first order images, n = 1 and:

λ = d*sinθ $_{1}$ .

The angle θ $_{1}$ can be calculated as follow:

tan θ $_{1}$ = 9.95 cm/15.0 cm = 0.663 and

θ $_{1}$ = $tan^{-1}$ (0.663) = 33.56°

Thus: d =λ/sin θ $_{1}$ = 461/sin 33.56° = 833.97 nm

PART A:

For a position of 8.55 cm:

tan θ $_{1}$ = 8.55 cm/15.0 cm = 0.57 and

θ $_{1}$ = $tan^{-1}$ (0.57) = 29.68°

Therefore:

λ =d*sin θ $_{1}$ = 833.97*sin 29.68° = 412.98 nm

PART B:

For a position of 12.15 cm:

tan θ $_{1}$ = 12.15 cm/15.0 cm = 0.81 and

θ $_{1}$ = $tan^{-1}$ (0.81) = 39.01°

Therefore:

λ =d*sin θ $_{1}$ = 833.97*sin 39.01° = 524.92 nm

6 0

3 years ago

Which statements accurately describe Ernest Rutherford’s experiment? Check all that apply.

Sunny_sXe [5.5K]

Answer:

The positive particles were deflected due the concentrated positive charge of the atom

Explanation:

Rutherford concluded that the positive particles were deflected through an angle greater than 90 due to electrostatic force of repulsion between the particles and positive part of the atom.

3 0

3 years ago

Read 2 more answers

The approach most commonly used to measure metabolic rate is to measure the rate of O2 consumption. Although there are small err

In-s [12.5K]

Explanation:

Metabollic rate is the amount of energy expended from an organism at a given point in time.

Equation of how glucose (food) is broken down via respiration:

C6H12O6(s) + 6O2(g) --> 6H2O(l) + 6CO2(g)

The amount of energy produced for the types of food is roughly proportional to the amount of oxygen use, so that the metabolic rate can be measured by measuring the rate of oxygen consumption.

3 0

3 years ago

in an oversight in the experiment jamie did not add the 4-5 additional drop of 6M JNO3. as result, will the reported number of m

kaheart [24]

The reported number of moles will be too low since the additional amount of oxygen is not included. It may be 6 drops but the molarity of the solution is 6M. this meas that for every ml of the JNO3 solution there is 6 moles of JNO3. In every mole of <span>JNO3 there are 3 moles of oxygen. So in every drop of oxygen there are 18 moles of oxygen. </span>

6 0

3 years ago