3 years ago

What makes a question able to be answered by science?

2 answers:

5 0

I dont understand exactly what the question is but the main things in science will be a hypothesis, or theory things like that

Rainbow [258]3 years ago

4 0

hypothesis,observation,experimenting basically stuff like that

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What does the second law of thermodynamics say about entropy apex?

sesenic [268]

The entropy of the universe is increasing

8 0

3 years ago

Read 2 more answers

A material having an index of refraction of 1.35 is used as an antireflective coating on a piece of glass (n = 1.50). What shoul

exis [7]

Answer:

103.70 nm

Explanation:

The minimum thickness of the film is given by $t=\frac{\lambda }{4n}$ where $\lambda$ is the wavelength and n is the index of the refraction

We have n =1.35

Wavelength $\lambda =560nm$

So the minimum thickness of the film $t=\frac{\lambda }{4n}=\frac{560}{4\times 1.35}=103.70\ nm$

3 0

3 years ago

Which elements has the smallest first ionization energy?

Setler [38]

Answer:

Cesium has smallest ionization energy.

Explanation:

Ionization energy is the energy that an atom at ground state must be absorb to release an electron to form a cation. for eg.

H ⇒ $H^{+} + e^{-}$

The unit of ionization energy is $\frac{KJ}{mol}$ .

The ionization energy is minimum for cesium & maximum for fluorine.

Ionization energy depends upon the radius of atom. cesium has smallest radius so it has low Ionization energy.

Therefore the cesium has smallest ionization energy.

8 0

4 years ago

When a 40-n force, parallel to the incline and directed up the incline, is applied to a crate on a frictionless incline that is

Genrish500 [490]

<span>F= ma force is directed on the working surface so 40 = m x 2 hence m must be 20 units needed are probably kg</span>

8 0

3 years ago

A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building.

Tpy6a [65]

Answer:

2.4s

Explanation:

The length of the pendulum = 75ft

Diameter d = 12 inches

The time period of the pendulum is given as

T = 2pi(L/g)^1/2

Then the time it takes to move from displacement to equilibrium is given as:

t = T/4

= (Pi/2)*(L/g)^1/2

= pi/2 x [(75x0.3048)/9.81]^0.5

= 1.57x[22.86/9.81)^0.5

= 2.4s

2.4 seconds is the least amount of time that it would take.

5 0

3 years ago