Answer:
A) F = 1.09 10 5 N, b) Yes
Explanation:
Part A
For this exercise we need the number of free electrons in copper, as the valence of copper +1 there is a free electron for each atom. Let's use the concept of density to find the mass of copper in the sphere
ρ = m / V
.m = ρ V = ρ 4/3 π r³
The radius is half the diameter
r = 1.9 10⁻² / 2 = 0.95 10⁻² m
ρ = 8960 kg / m3
m = 8960 4/3 π (0.95 10⁻²)³
m = 3.2179 10⁻² kg
The molecular weight of copper is 63,546 g / mol which has 6,022 10²³ atoms
With this we can use a rule of proportions to enter the number of atom is this mass
#_atom = 6.022 10²³ 3.2179 10⁻² / 63.546 10⁻³
#_atom = 3,049 10²³
Therefore there is the same number of electrons, as they indicate that the charge of the protone and the electon differs by 1/10⁹ the total charge for each spherical is
q = e / 10⁹ #_atom
q = e / 10⁹ 3,049 1023
q = 3,049 10⁴ (-1.6 10⁻¹⁹)
q = -4,878 10-5 C
Electric force is
F = k q₁q₂ / r²
F = k q² / r²
Let's calculate
F = 8.99 10⁹ (4.878 10⁻⁵)²2 / (1.4 10⁻²)²
F = 1.09 10 5 N
This is a force of repulsion.
Part B
The magnitude of this force is in very easy to detect
Answer:
No
Explanation:
The fastest recorded time for a person to run 100 metres is 9.58 seconds, which is the equivalent of 10.4 metres per second
Answer:
ididate is a good one and
There are a variety of waves from light waves to mechanical waves. Waves can exhibit different effects like the Doppler Effect.
All light waves behave in a similar manner. They either get transmitted, reflected, absorbed, refracted, polarized, diffracted, or scattered based off of the composition of the object and the wavelength of the light.
According to Wikipedia, “One important property of mechanical waves is that their amplitudes are measured in an unusual way, displacement divided by (reduced) wavelength. When this gets comparable to unity, significant nonlinear effects such as harmonic generation may occur, and, if large enough, may result in chaotic effects.” Mechanical waves are chaotic and its “amplitudes” are measured unusually.
Diffraction is when light bends around objects and spread after passing out through small openings. “Diffraction occurs with all waves, including sound waves, water waves, and electromagnetic waves such as light that the eye can see.”-Wikipedia. Here is the formula to Diffraction: <em>d </em>sin <em>θ </em>= <em>nλ</em>
Doppler effect can occur for any type of wave like sound or water waves. An example of this is when we hear a police car with its sirens on, coming towards us. The closer you are to the police car, the higher the wavelength, but the farther away you are, the lower the wavelength.
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12.00 min = 0.2 hr
8.00 min = 0.15 hr
Total distance:
(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) + (20.0 km/hr) (0.2 hr)
= 8.25 km
Average speed:
(10.0 km/hr + 15.0 km/hr + 20.0 km/hr) / 3
= 15 km/hr
Change in position:
(10.0 km/hr) (0.2 hr) + (15.0 km/hr) (0.15 hr) - (20.0 km/hr) (0.2 hr)
= 0.25 km
Average velocity:
(10.0 km/hr + 15.0 km/hr - 20.0 km/hr) / 3
≈ 1.67 m/s
