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2 years ago

Most scientists, inventors and engineers do not come up with their ideas all on their own but rather

Physics

1 answer:

Natalka [10]2 years ago

6 0

Answer:

Benjamin Franklin, Thomas Edison

and Robert Anderson, Thomas Davenport

Explanation:

Edison was Franklin's idol in studying electricity (Edison's electric light bulb, and Franklin's metal key string kite static experiment)

Anderson and Davenport for the first electric car

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What does Inert mean? Why are Noble Gases Inert? Include an explanation of atomic structure and electrons.

iren2701 [21]

Depending on what way you are trying to use it electrons connect to almost anything just like little balls of magnetics think of it that way. of it being able to just force and charge into any thing.

7 0

3 years ago

Read 2 more answers

Suppose that you make a series RC circuit with a capacitor and a known resistor that has a 5% tolerance: R= 5.20 ± 0.26kΩ. You p

Masja [62]

Answer:

correct answer is C

Explanation:

The time constant of an RC circuit is

τ = RC

so to find the capacitance

C = τ/ R

C = 2.150 / 5.20 10³

C = 4.13 10⁻⁴ F

to find the error we use the worst case

ΔC = | $|\frac{dC}{d \tau }| \ \Delta \tau + | \frac{dC}{dR} | \ \Delta R$

the absolute value guarantees that we find the worst case, we evaluate the derivatives

ΔC = 1 /R Δτ + τ/R² ΔR

the absolute values of the errors are

Δτ = 0.002 s

ΔR = 0.3 kΩ

we substitute

ΔC = 0.002 /5.20 10³ + 2.150/(5.20 10³)² 0.3 10³

ΔC = 3.8 10⁻⁷ + 1.74 10⁻⁵

ΔC = 1.77 10⁻⁵ F

the uncertainty or error must be expressed with a significant figure

ΔC = 2 10⁻⁵ F

the percentage error is

Er% = $\frac{\Delta C}{C} \ 100$

Er% = $\frac{2 \ 10^{-5} }{ 4.13 \ 10^{-4} } \ 100$

Er% = 4.8%

the correct answer is C

3 0

3 years ago

What are the differences between convex lens and convex mirrors ?

MaRussiya [10]

Answer:

The mirror is opaque while the lens is transparent

Explanation:

The lens is transparent throughout (lets light pass through), while the mirror reflects light. You are basically asking for the difference between a lens and a mirror

But how about the the behaviors of the convex mirror and convex lens? The convex lens will let light pass through and focus it on the other side of it. If you stand on one side of the lens, you can see what is on the other side of it. Think about a camera lens that's just curved!The convex mirror will reflect the light on the same side of it you'll basically will just see yourself but you'll look funny.

4 0

3 years ago

what frequency of light must an electron in hydrogen absorb to jump from the n=2 state to the n=5 state? (a) 2.86 Hz (b) 4.08 Hz

Ostrovityanka [42]

Answer:

Explanation:

Find the level energy of n=2 and n=5, using the formula:

$E = -E_0/n^2$

where $E_0=13.6eV$

$E_2 =\frac{-13.6}{2^2}=-3.4eV$

$E_5 =\frac{-13.6}{5^2}=-0.544eV$

To jump from n=2 to n=5 the electron absorbs a photon with energy equal to $(-0.544) - (-3.4)=2.856eV$ , using the next formula to find specific wavelength $\lambda$ to that energy